views

Embracing all the joy in Mudville

Rachel Sauer — Thu, 03 Apr 2025 17:16:36 +0000

Embracing all the joy in Mudville Rachel Sauer Thu, 04/03/2025 - 11:16

Jared Bahir Browsh

Even though Major League Baseball faces an uncertain future entering its 150th season, Opening Day still holds a special place in the culture and fans’ hearts

As Rockies fans make their way to Denver for the team's 33rd home opener Friday, we are reminded of the excitement and hope that accompanies every team starting the season and looking toward the World Series. Why does opening day mean so much to so many?

For many, spring and summer are marked by the cracking of bats and the camaraderie of the tailgate as fan hope is renewed and the losses of seasons past are replaced by visions of the World Series. Even as baseball faces a less-than-certain future, with viewership down and ticket prices way, way up, Opening Day remains deeply rooted in our collective memories. Why?

Jared Bahir Browsh is the Critical Sports Studies program director in the CU �鶹ӰԺ Department of Ethnic Studies.

This tradition has been nearly 150 years in the making, with the first National League Opening Day occurring on April 22, 1876, in Philadelphia, with the Athletics defeating the Boston Red Caps. Since that first opener, the tradition and pageantry has only grown, with cities recognizing the day with parades and fans awakening from their winter hibernation to celebrate what has become an unofficial holiday in many cities.

One city where this tradition is strongly rooted is Cincinnati, home of the first recognized all-professional team in baseball, the Red Stockings. Manager John Joyce, who organized the original team in 1866, updated the Cincinnati franchise in 1875, and the team then joined the newly established National League (NL) in 1876.

Though beer has become a baseball tradition, in 1880 the Cincinnati Reds were kicked out of the NL for selling beer and playing on Sundays. Previous to that, William Hulbert, who had overseen the organization of the league after the National Association of Professional Base Ball Players (NA) disbanded, took several of the financially successful teams from the NA and established the NL with a number of strict rules, including a ban on alcohol sales and a ban on Sunday games, to address the negative reputation of baseball at the time—which included drinking, gambling and debauchery. The Cincinnati franchise ignored these rules, partly as an effort to attract German immigrants to the game, and was expelled, leading the team to go bankrupt and fold.

In spite of these challenges, professional baseball continued in Cincinnati, with Opening Day growing in prominence. The Reds have played almost every opening day at home since 1876, a tradition most likely rooted in their position as one of the southernmost charter members in the NL. The newly re-established Cincinnati Reds played in the American Association before joining the NL again in 1890 with the Brooklyn Bridegrooms (now Dodgers), expanding the NL to eight teams. Reds’ business manager Frank Bancroft began to intensely market Opening Day after he joined the team in 1892, establishing a tradition for not only the Queen City, but baseball as a whole, which just so happened to be the same year the NL allowed beer sales and games on Sunday.

Snow on Opening Day

An illustration of Opening Day at New York's Polo Grounds on April 29, 1886. (Illustration: Greater Hartford Twilight Baseball League)

The Opening Day tradition continued to grow after the turn of the 20th century, although weather, and sometimes even the fans, did not always cooperate. After the New York Giants went down 3-0 in their Opening Day game against the Philadelphia Phillies at the historic Polo Grounds in 1907, Giants fans threw snowballs on the field—including one that hit the home plate umpire, leading him to call the game in favor of the Phillies.

Attention on Opening Day increased when baseball fan President William Howard Taft threw out the ceremonial first pitch for the Washington Senators in their home opener in 1910. Twelve presidents have thrown out the ceremonial first pitch of the season, and many franchises have invited team legends and celebrities to welcome in the new season.

In 1920, the tradition of the Findlay Market Parade began in Cincinnati to celebrate Opening Day after the team won the 1919 World Series in spite of rumors that the Chicago White Sox had fixed the series—rumors that were later confirmed. Other teams built their own Opening Day traditions over time, like the Anheuser-Busch Clydesdale circling the field in St. Louis.

Opening Day continued despite two world wars and the Great Depression, with a number of milestones being established by the unofficial holiday. In the Brooklyn Dodgers’ Opening Day game on April 15, 1947, Jackie Robinson broke the color line in baseball, scoring the winning run against the Boston Braves. In 1974, while playing for the same Braves—who had relocated from Milwaukee to Atlanta in 1966—Hank Aaron tied Babe Ruth’s home run record at 714. The following season, Frank Robinson debuted as the first African American manager in baseball history.

Major League Baseball has maintained the tradition of Opening Day, even creating a unique logo in 2001, in spite of changes in the schedule. ESPN began broadcasting “opening games” the night before the official Opening Day in 1994, further establishing the noteworthy aspects of the day. On Opening Day in 1999, the first regular-season game outside of the United States was played in Monterrey, Mexico, with the Rockies beating the San Diego Padres 8-2.

The Colorado Rockies will play their 2025 home opener Friday at Coors Field in Denver. (Photo: Visit Denver)

The first regular season to open outside of North America occurred the next year in Tokyo; however, the games between the New York Mets and Chicago Cubs were scheduled the week before the official Opening Day, establishing the precedent that these early season international opening games would not be considered Opening Day games. The 2025 Tokyo Series took place between the Dodgers and Cubs on March 18 and 19, following several exhibition games in Japan—more than a week before the officially recognized Opening Day.

Opening Day traditionally took place on a Monday through the 2011 season, when MLB split the Opening Days of its 30 teams across two days to the last Thursday and Friday of March to avoid the World Series extending into November, as it had the previous two seasons. After returning to a Monday start in 2013, the league made the change to start the season on a Thursday permanent in 2018, with all 30 teams scheduled to play on Thursday, March 29.

As Major League Baseball begins its 150th season, many questions remain regarding the future of the sport. Two teams are playing in minor league stadiums due to the pending relocation of the Athletics and the Tampa Bay Rays, and MLB and ESPN will end their media rights deal following the 2025 season, after the network tried to reduce its rights payments from $550 million to $200 million.

MLB continues to try to make games more attractive to younger fans by speeding up pace of play and by highlighting top stars like the L.A. Dodgers’ Shohei Ohtani and the Mets’ Juan Soto. In spite of this transitional period for the sport, however, one thing remains constant: the hope and excitement that Opening Day inspires.

Jared Bahir Browsh is an assistant teaching professor of critical sports studies in the CU �鶹ӰԺ Department of Ethnic Studies.

Did you enjoy this article? Subscribe to our newsletter. Passionate about critical sports studies? Show your support.

Even though Major League Baseball faces an uncertain future entering its 150th season, Opening Day still holds a special place in the culture and fans’ hearts.

Off

Traditional

White

How March went mad … for basketball

Rachel Sauer — Wed, 19 Mar 2025 17:12:17 +0000

How March went mad … for basketball Rachel Sauer Wed, 03/19/2025 - 11:12

Jared Bahir Browsh

The big business of the annual college basketball tournament, continuing with the second day of First Four games today, has been more than a century in the making

Every year, as the seasons shift from winter to spring, college basketball fans throughout the country prepare to watch 136 men’s and women’s basketball teams battle for their respective national championships.

Although the tournament starts with the “First Four” games for the men’s and women’s tournaments, respectively, the first two rounds that are played during the first weekend of the tournament have become an unofficial holiday marked by billions of dollars in decreased productivity as fans watch the first 48 games played in each tournament—during which teams vie to extend their seasons another week into the “Sweet 16.”

In the modern media age, this has become a tradition in our sports calendar, but it took several developments over the last half century for March to truly become mad.

Jared Bahir Browsh is the Critical Sports Studies program director in the CU �鶹ӰԺ Department of Ethnic Studies.

Basketball’s roots grew out of the college game, with James Naismith inventing the game in December 1891 to keep young men at the YMCA International Training School, which is now Springfield College, fit and occupied in the winter months. The game was soon introduced to women at Smith College, and by 1893 colleges and universities began forming teams—first playing against local amateur clubs before intercollegiate games began in 1894.

During this time, teams played under different rules, with some games featuring as many as nine players per side. By the turn of the 20th century, five-on-five became standard for men’s games, whereas women played six-on-six through most of the 1960s, with the last high school six-on-six tournament occurring in 1995 in Oklahoma.

The National Collegiate Athletic Association (NCAA) was formed in 1906 as the Intercollegiate Athletic Association of the United States (IAAUS) before taking its current name in 1910. The NCAA was formed in response to the prevalence of injuries in college football; President Theodore Roosevelt called for two conferences comprising top college football programs to address the injuries and deaths occurring in the game. The establishment of the NCAA led to a decades-long power struggle with the Amateur Athletic Union (AAU) for control of intercollegiate sports.

As the NCAA wrested control over football from the AAU, basketball continued to be loosely organized under the AAU, which organized the first tournament in 1898. Although the tournament did not happen annually until after World War I, the AAU did organize several tournaments for the 1904 Olympics, during which basketball debuted as a demonstration sport. There was an amateur tournament, a separate college tournament and several tournaments for high school and elementary school players.

A battle for control

The battle for control between the AAU and NCAA continued through the early 1900s, although the latter’s commitment to basketball was questionable through the 1930s. However, the NCAA did begin organizing rules committees and established its first championship, in track and field, for the 1921 season.

The first annual college basketball tournaments were organized in successive years with the NAIA tournament, organized by Naismith, starting in 1937, the National Invitation Tournament (NIT) in 1938 and the NCAA tournament in 1939. Coincidentally, the term “March Madness” was coined by Henry V. Porter, a noted coach and inventor of basketball equipment, in reference to the Illinois high school basketball tournament the same year as the first NCAA tournament. Sports commentator Brent Musburger first used the term in reference to the men’s tournament in 1982.

The NIT, which took place at Madison Square Garden, was seen as the premiere tournament through the 1940s due to the national media presence in New York City. Temple University defeated the University of Colorado in the first NIT championship, with the Buffaloes returning to the championship and winning in 1940 over Duquesne University. Because the NIT occurred before the NCAA tournament, Colorado and Duquesne competed in both.

Clemson players celebrate a win over Arizona in the Sweet 16 round of the 2024 NCAA Tournament. (Photo: TigerNet.com)

The early 1950s featured two developments that further isolated each tournament, both involving the City College of New York (CCNY). CCNY became the first team to win both tournaments in the same year, with the championships of both tournaments occurring in Madison Square Garden in 1950. This double win led the NCAA to ban teams from competing in both tournaments in the same year.

Soon after, that CCNY team was implicated in a wide-ranging point shaving scandal, which involved bribery and match fixing. The school’s presence in New York provided bettors easier access to bookies and bookies greater access to players.

The NCAA held its finals in New York all but one year between 1943 and 1950, but after the scandal the championship never returned to Madison Square Garden, even as the NIT continued to call New York City home.

A growing NCAA

The next big developments occurred in the late 1960s and 1970s as the NCAA further established its control over the basketball postseason. In 1968, UCLA and Houston played in the “Game of the Century” in front of more than 52,000 fans in the Houston Astrodome. This game was a follow-up to the previous year’s semifinal matchup between the two teams, which pitted star players Lew Alcindor (now known as Kareem Abdul-Jabbar), who was recovering from an eye injury, and Elvin Hayes. The game was nationally televised and accelerated college basketball’s transition from a regional to a national sport.

In 1970, Marquette declined an invitation to the NCAA tournament after it was placed in the Midwest Region, where games were played in Fort Worth, Texas, rather than the Mideast Region, where games were played in Dayton, Ohio—significantly closer to Marquette’s campus in Milwaukee, Wisconsin. In 1971, the NCAA declared that any team that is offered a bid to the NCAA tournament could not accept a bid to any other postseason tournament.

In 1975, after several top-ranked teams missed out on bids due to not winning their conferences, the tournament expanded from 25 teams to 32 teams to accommodate at-large bids from conferences, establishing a selection process and the anxiety of the “bubble.”

UCLA player Lew Alcindor (now Kareem Abdul-Jabbar), right, snags a rebound as Houston’s Elvin Hayes (44) makes a leaping rebound attempt in what was called the “Game of the Century.” (Photo: Associated Press)

Four years later, in 1979, the tournament expanded to 40 teams but conferences were still limited to two total teams in the tournament. The 1979 tournament championship pitted Magic Johnson’s Michigan State team and Larry Bird’s Indiana State team and is still the most-viewed championship in tournament history.

The tournament continued to grow in 1980, adding eight teams and removing the conference limits. At the time, the Big Ten, Atlantic Coast Conference (ACC), Pac-10 and Southeastern Conference (SEC) were college basketball’s power conferences, with teams in the Northeast and New England playing in the amorphous Eastern Collegiate Athletic Conference (ECAC), which operated four regional tournaments between 1975 and 1981.

Providence coach Dave Gavitt saw an opportunity to organize a new conference with teams connected to major media markets, leveraging the growth of television through cable and syndication to form the original Big East. As the Big East began play in the fall of 1979, a small Connecticut network—the fledgling ESPN—began broadcasting nationally; soon the conference and ESPN became partners in each other's growth. As ESPN sought programming, it also began airing the early rounds of the tournament, which previously aired only locally as national broadcasters refused to pre-empt their regular programming for the early-round games.

The Big East increased college basketball’s media visibility on cable television, particularly during the week in prime time, and aided in recruiting as it became one of the top conferences in college basketball. When the tournament expanded to 64 teams in 1985, three of the Final Four teams were from the Big East, with the eighth-seeded Villanova University defeating defending champion Georgetown University in the championship game.

Expanding tournaments

The first NCAA-sponsored women’s tournament occurred in 1982, with 32 teams facing off. Previously, the Commission on Intercollegiate Athletics for Women (CIAW) had established the first tournament in 1969, when women’s games were still under six-player rules. The last CIAW tournament featured five-on-five rules before the Association for Intercollegiate Athletics for Women (AIAW) took control of the tournament in 1971. Title IX, passed in 1972, accelerated the growth of women’s college sports well before the NCAA finally recognized the profitability of women’s basketball—10 years after the educational amendment was passed.

Kamilla Cardoso was named the NCAA Tournament Most Outstanding Player in 2024 after helping lead South Carolina to an 87-75 victory over Iowa, clinching the championship title. (Photo: Erik Drost/Wikimedia Commons)

Throughout the rest of the 1980s and 1990s, the men’s tournament remained fairly static even as the NCAA continued to evolve. After the 1984 Supreme Court decision NCAA v. Board of Regents of the University of Oklahoma, which found that the NCAA’s television plans violated antitrust laws, the NCAA was no longer able to limit how often football teams could appear on television, ultimately allowing conferences to sign their own media contracts with broadcasters and leading to a massive conference realignment that continues today. This, in turn, led to the NCAA basketball tournament becoming the most valuable media property overseen by the association.

The women’s tournament expanded to 64 teams in 1994, and the last men’s Final Four to take place in a basketball venue was played in 1996; subsequent events have taken place in domed football stadiums. The tournament expanded to 65 teams in 2001 to accommodate the Mountain West Conference receiving an automatic bid reintroducing play-in games to the tournament.

A century of madness

As the tournament approached the new millennium, fans were offered new ways to watch it. In 1999, DirecTV offered a premium package allowing fans to watch all the games through the satellite service, a feature previously only available in sports bars. The same year, CBS broadcast the Final Four in high definition for the first time.

In 2003, work productivity took another hit as CBS partnered with Yahoo! to stream tournament games for the first time through the latter’s platinum service. CBS launched its own March Madness OnDemand Service the following year, giving fans access to games outside of the CBS broadcast for $9.95.

Seven years later, in 2010, the NCAA announced it was exploring expanding the tournament, even announcing it wanted to expand to 96 teams. At the same time, the NCAA began negotiations with several media networks on a new media deal. The association settled on expanding to 68 teams, establishing the “First Four” games in which the four lowest-ranked teams that earned automatic bids and the four lowest at-large teams facing off in play-in games. This accompanied a new combined television deal in which CBS and Turner Sports agreed to broadcast all games on CBS, TNT, TBS and TruTV.

In 2021, after Texas Christian University center Sedona Prince, who at the time was playing for the University of Oregon, posted pictures on social media highlighting the disparity between the fitness facilities for the women’s tournament compared to the men’s, the NCAA conducted a gender equality review. This led to the women’s tournament expanding to 68 teams and the March Madness branding being extended to the women’s tournament. Many still feel the women’s tournament is undervalued, especially after the 2024 Women’s Championship earned higher ratings than its male counterpart.

So, every March hope springs eternal for 136 teams, but for dedicated fans, the madness has been more than a century in the making.

Jared Bahir Browsh is an assistant teaching professor of critical sports studies in the CU �鶹ӰԺ Department of Ethnic Studies.

Did you enjoy this article? Subscribe to our newsletter. Passionate about critical sports studies? Show your support.

The big business of the annual college basketball tournament, continuing with the second day of First Four games today, has been more than a century in the making.

Traditional

White

Communities working together for better air

Rachel Sauer — Thu, 06 Mar 2025 19:32:50 +0000

Communities working together for better air Rachel Sauer Thu, 03/06/2025 - 12:32

Jenni Shearston

Colorado is tackling air pollution in vulnerable neighborhoods by regulating five air toxics

The Globeville, Elyria-Swansea and Commerce City communities in metro Denver are choked by air pollution from nearby highways, an oil refinery and a Superfund site.

While these neighborhoods have long suffered from air pollution, they’re not the only ones in Colorado.

Now, Colorado is taking a major step to protect people from air pollutants that cause cancer or other major health problems, called “air toxics.” For the first time, the state is developing its own state-level air toxic health standards.

CU �鶹ӰԺ researcher Jenni Shearston studies chemical exposure and health, measuring and evaluating the impact of air pollution on people’s well-being.

In January 2025 Colorado identified five air toxics as “priority” chemicals: benzene, ethylene oxide, formaldehyde, hexavalent chromium compounds and hydrogen sulfide.

The state is in the process of setting health-based standards that will limit the amount of each chemical allowed in the air. Importantly, the standards will be designed to protect people exposed to the chemicals long term, such as those living near emission sources. Exposure to even low amounts of some chemicals, such as benzene, may lead to cancer.

As a researcher studying chemical exposure and health, I measure and evaluate the impact of air pollution on people’s well-being.

Colorado’s new regulations will draw on expert knowledge and community input to protect people’s health.

Communities know what needs regulation

In your own community, is there a highway that runs near your house or a factory with a bad odor? Maybe a gas station right around the corner? You likely already know many of the places that release air pollution near you.

When state or local regulators work with community members to find out what air pollution sources communities are worried about, the partnership can lead to a system that better serves the public and reduces injustice.

For example, partnerships between community advocates, scientists and regulators in heavily polluted and marginalized neighborhoods in New York and Boston have had big benefits. These partnerships resulted in both better scientific knowledge about how air pollution is connected to asthma and the placement of air monitors in neighborhoods impacted the most.

In Colorado, the process to choose the five priority air toxics included consulting with multiple stakeholders. A technical working group provided input on which five chemicals should be prioritized from the larger list of 477 toxic air contaminants.

The working group includes academics, members of nongovernmental organizations such as the Environmental Defense Fund – local government and regulated industries, such as the American Petroleum Institute.

There were also opportunities for community participation during public meetings.

At public hearings, community groups like GreenLatinos argued that formaldehyde, instead of acrolein, should be one of the prioritized air toxics because it can cause cancer.

Additionally, formaldehyde is emitted in some Colorado communities that are predominantly people of color, according to advocates for those communities. These communities are already disproportionately impacted by high rates of respiratory disease and cancer.

Other members of the community also weighed in.

“One of my patients is a 16-year-old boy who tried to get a summer job working outside, but had to quit because air pollution made his asthma so bad that he could barely breathe,” wrote Logan Harper, a Denver-area family physician and advocate for Healthy Air and Water Colorado.

How is air quality protected?

At the national level, the Clean Air Act requires that six common air pollutants, such as ozone and carbon monoxide, are kept below specific levels. The act also regulates 188 hazardous air pollutants.

Individual states are free to develop their own regulations, and several, including California and Minnesota, already have. States can set standards that are more health-protective than those in place nationally.

Four of the five chemicals prioritized by Colorado are regulated federally. The fifth chemical, hydrogen sulfide, is not included on the U.S. Environmental Protection Agency’s hazardous air pollutant list, but Colorado has decided to regulate it as an air toxic.

State-level regulation is important because states can focus on air toxics specific to their state to make sure that the communities most exposed to air pollution are protected. One way to do this is to place air pollution monitors in the communities experiencing the worst air pollution.

For example, Colorado is placing six new air quality monitors in locations around the state to measure concentrations of the five priority air toxics. It will also use an existing monitor in Grand Junction to measure air toxics. Two of the new monitors, located in Commerce City and La Salle, began operating in January 2024. The remainder will start monitoring the air by July 2025.

When Colorado chose the sites, it prioritized communities that are overly impacted by social and environmental hazards. To do this, officials used indexes like the Colorado EnviroScreen, which combines information about pollution, health and economic factors to identify communities that are overly burdened by hazards.

The Commerce City monitor is located in Adams City, a neighborhood that has some of the worst pollution in the state. The site has air toxics emissions that are worse than 95% of communities in Colorado.

Air toxics and health

The five air toxics that Colorado selected all have negative impacts on health. Four are known to cause cancer.

When state or local regulators work with community members to find out what air pollution sources communities are worried about, the partnership can lead to a system that better serves the public and reduces injustice.

Benzene, perhaps the most well known because of its ability to cause blood cancer, is one. But it also has a number of other health impacts, including dampening the ability of the immune system and impacting the reproductive system by decreasing sperm count. Benzene is in combustion-powered vehicle exhaust and is emitted during oil and gas production and refinement.

Ethylene oxide can cause cancer and irritates the nervous and respiratory systems. Symptoms of long-term exposure can include headaches, sore throat, shortness of breath and others. Ethylene oxide is used to sterilize medical equipment, and as of 2024, it was used by four facilities in Colorado.

Formaldehyde is also a cancer-causing agent, and exposure is associated with asthma in children. This air toxic is used in the manufacture of a number of products like household cleaners and building materials. It is also emitted by oil and gas sources, including during fracking.

Hexavalent chromium compounds can cause several types of cancer, as well as skin and lung diseases such as asthma and rhinitis. A major source of hexavalent chromium is coal-fired power plants, of which Colorado currently has six in operation, though these plants are scheduled to close in the next five years. Other sources of hexavalent chromium include chemical and other manufacturing.

Finally, long-term exposure to hydrogen sulfide can cause low blood pressure, headaches and a range of other symptoms, and has been associated with neurological impacts such as psychological disorders. Some sources of hydrogen sulfide include oil refineries and wastewater treatment plants.

Jenni Shearston is an assistant professor in the Department of Integrative Physiology.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Colorado is tackling air pollution in vulnerable neighborhoods by regulating five air toxics.

Traditional

White

Nationalism and diplomacy are inherent to international sporting events

Rachel Sauer — Fri, 21 Feb 2025 17:48:23 +0000

Nationalism and diplomacy are inherent to international sporting events Rachel Sauer Fri, 02/21/2025 - 10:48

Jared Bahir Browsh

The International Cricket Council Champions Tournament, beginning this week, highlights how national rivalries and geopolitical tensions can meet on playing fields

Courses in the Critical Sports Studies program in the Department of Ethnic Studies often start with the Great Sports Myth, a term coined by Jay Coakley, professor emeritus of sociology at the University of Colorado Colorado Springs. The myth is that sports are inherently good, and most experiences in sports are positive and do not need to be studied critically.

In combating this myth, we examine sporting nationalism with the playing field serving as a symbolic battleground between nations. As Pakistan prepares to co-host the International Cricket Council (ICC) Champions Tournament beginning this week, the nation's nationalistic rivalry with India comes to the forefront and reminds us that the competition on the field is often reflective of political tensions off of it.

Jared Bahir Browsh is the Critical Sports Studies program director in the CU �鶹ӰԺ Department of Ethnic Studies.

India and Pakistan’s political tensions date back to the British partition of the Indian subcontinent in 1947, although ethnic and religious tensions predate the end of Britain’s colonization of the region. India has been a member of the ICC since 1926, with Pakistan joining the ICC soon after independence in 1952.

Sporting relations between the nations have faced a number of stoppages, while other countries have canceled test matches because of threats and actual violence against cricket teams, particularly in Pakistan.

The New Zealand cricket team canceled their remaining 2002 matches in Pakistan after a suicide bomb outside of their Karachi hotel, while other countries like Australia refused to tour due to similar concerns. In 2009, the Sri Lankan cricket team’s bus was fired on in Lahore during their test tour, which was scheduled after India pulled out of Pakistan following the 2008 Mumbai terrorist attacks. As a result, Pakistan lost the opportunity to co-host the 2011 ICC World Cup; the 2025 ICC Champions Tournament is the first international cricket tournament to be hosted by Pakistan since the 1996 ICC World Cup. India's refusal to play in Pakistan led to UAE being named as a co-host for India’s matches in the tournament, exemplifying continued tensions between the nations.

Yet diplomacy has been fostered through sport as well, including the peace initiatives of former Indian Prime Minister Atal Bihari Vajpayee, which led to the first matches between the nations in Pakistan in 15 years in 1999 and the Friendship Cups in Canada in the 1990s and 2000s.

Colonization and sporting tensions

Colonization has been at the core of sporting tensions between dozens of nations, including Britain and members of the Commonwealth like Ireland and Australia. Ireland in particular has used international sporting events as a forum for protest against Britain—most famously at the 1906 Intercalated Games in Athens, Greece. After being denied the gold medal in what many felt was a biased ruling by a judge from the United States, which followed the decision to force Irish athletes to compete on behalf of the United Kingdom, track and field athlete Peter O’Connor scaled a flag pole and unfurled an Erin Go Bragh flag, a symbol of the movement for Irish home rule.

The Olympics also have long been a nexus for sporting nationalism. One of the most distinct examples of this was at the 1936 Summer Games in Berlin. In spite of rising concerns over antisemitism under Hitler, the United States, led by USOC President Avery Brundage, and others agreed not to boycott the games in exchange for Nazi Germany suspending antisemitic messaging and the full enactment of the Nuremberg Laws until after the games.

Adolf Hitler saw the 1936 Summer Olympic Games as a forum to display Aryan supremacy through victory and spectacle, which included introducing the torch relay. (Photo: Wikimedia Commons)

Hitler saw the games as a forum to display Aryan supremacy through victory and spectacle. Television was introduced at the games along with the torch relay and the opening ceremony as an ostentatious show. The entire games were a primary example of “sportwashing,” which uses sport to improve public opinion of a nation or group.

Much like the India-Pakistan rivalry, a number of other geopolitical tensions have played out on various sporting fields and courts around the world. George Orwell published “The Sporting Spirit” in December 1945, a few months after the end of World War II, warning of the use of sport to encourage hyper-nationalism. Orwell was particularly critical of the Stalin regime’s use of sport to exhibit the Soviet Union and communism’s “superiority” over capitalism after the soccer team FC Dynamo Moscow toured Britain.

In 1952, the Soviet Union participated in its first Summer Olympic Games, setting off decades of displays of Cold War sporting nationalism on both sides of the Iron Curtain, but particularly exemplified by the competition between the USSR and the United States.

The Olympics became the largest stage for nationalistic competition. Every four years, the Cold War rivalries played out on the global stage of the Summer and Winter Olympics. Some of the most famous moments in Olympic history include the controversial end of the 1972 Olympic basketball final, during which the Soviet Union beat the U.S. team by one point under questionable rule interpretations, and the 1980 Miracle on Ice in the semifinal of the ice hockey tournament, when amateur U.S. players defeated the Soviet Union.

Both events exemplified the rivalry between these superpowers. The 1972 Olympics also included the tragic terrorist attack by Black September militants, leading to the murder of 11 Israeli athletes—an example of how ethnic-nationalism, sport and violence can intersect.

Boycott and protest

Boycotting sporting events and protest actions during competition have also been responses to various forms of nationalism and political tensions. The pending boycott of the 1980 Summer Olympic Games in Moscow by the United States intensified the attention on the competition between the USSR and the United States in Lake Placid during the Winter Games that year.

Recently, hockey reemerged as a forum for nationalism as the United States and Canada faced off twice in the National Hockey League (NHL)-run 4 Nations Face-Off. The tournament was limited to NHL players, so the teams were not technically the national teams of the countries included in the tournament. It did feature four of the five countries with the largest representation in the NHL (Russia was excluded due to the invasion of Ukraine), with the league leveraging nationalistic feelings between Finland and Sweden and United States and Canada. The heightened tension between the North American teams was due, in part, to comments by U.S. President Donald Trump regarding the annexation our northern neighbors. This may serve as a preview of the heightened nationalism around the 2026 Olympic men’s and women’s ice hockey tournaments, especially if Russian athletes are permitted to compete.

U.S. sprinters Tommie Smith (first place) and John Carlos (third place) raised their fists to protest U.S. segregation and racism during the medical ceremony for the 200-meter sprint at the 1968 Summer Olympics; Australian sprinter Peter Norman (second place) wore a badge for the Olympic Project for Human Rights. (Photo: Angelo Cozzi/Mondadori Publishers)

The Soviet Union and other Eastern Bloc countries in turn boycotted the 1984 Summer Olympics in Los Angeles. The 1980 boycott was triggered by the Soviet Union’s invasion of Afghanistan in 1979.

White nationalism and racial discrimination have also been a frequent motivator for protest and boycotts. The Olympic Project for Human Rights promoted a boycott of the 1968 games in Mexico City, with several athletes—including Kareem Abdul Jabbar—deciding not to go based on continuing discrimination of Blacks in the United States, lack of African American representation on the coaching staffs of Olympic teams, Muhammad Ali’s loss of his heavyweight championship due to his refusal to be drafted into the Vietnam War and apartheid policies in South Africa and Rhodesia.

Track and field athletes Tommie Smith and John Carlos did decide to compete but famously raised their fists in protest after winning gold and bronze respectively in the 200 meters.

Apartheid policies also led to the South African Olympic Committee being expelled from the IOC in 1970. Prior to South Africa’s expulsion, several other organizations had banned the nation from hosting events as far back as 1934 due to their policies forbidding non-white participants to compete. After the New Zealand rugby team toured South Africa in 1976, 29 mostly African nations boycotted the Montreal Games that same year after the IOC refused to ban New Zealand.

This put pressure on Commonwealth countries to adopt the Gleneagles Agreement to expand the sporting boycott of South Africa. Taiwan also boycotted the 1976 games the day before the Opening Ceremony after the Canadian government’s refusal to recognize their nation as the Republic of China.

Sports like cricket and football are important cultural experiences in countries like Pakistan and India, but their presence is evidence of those countries’ colonial past and of nationalism emanating from the British Empire. Most British colonies around the world adopted the sport soon after occupation, serving as historical examples of cultural imperialism.

Since international competition started in the 19th century, sports like cricket and events like the World Cup can simultaneously bring people together and promote community while also inflaming nationalistic tensions. For over 70 years, the intense cricket rivalry between India and Pakistan has done both.

Jared Bahir Browsh is an assistant teaching professor of critical sports studies in the CU �鶹ӰԺ Department of Ethnic Studies.

Did you enjoy this article? Subscribe to our newsletter. Passionate about critical sports studies? Show your support.

The International Cricket Council Champions Tournament, beginning this week, highlights how national rivalries and geopolitical tensions can meet on playing fields.

Traditional

White

National Bank Stadium in Karachi, Pakistan (Photo: Baseer Piracha/Wikimedia Commons)

It hits Earth like a bolt of lightning

Rachel Sauer — Mon, 10 Feb 2025 22:48:36 +0000

It hits Earth like a bolt of lightning Rachel Sauer Mon, 02/10/2025 - 15:48

Lauren Blum

Lightning strikes link weather on Earth and weather in space

There are trillions of charged particles—protons and electrons, the basic building blocks of matter—whizzing around above your head at any given time. These high-energy particles, which can travel at close to the speed of light, typically remain thousands of kilometers away from Earth, trapped there by the shape of Earth’s magnetic field.

Occasionally, though, an event happens that can jostle them out of place, sending electrons raining down into Earth’s atmosphere. These high-energy particles in space make up what are known as the Van Allen radiation belts, and their discovery was one of the first of the space age. A new study from my research team has found that electromagnetic waves generated by lightning can trigger these electron showers.

A brief history lesson

At the start of the space race in the 1950s, professor James Van Allen and his research team at the University of Iowa were tasked with building an experiment to fly on the United States’ very first satellite, Explorer 1. They designed sensors to study cosmic radiation, which is caused by high-energy particles originating from the Sun, the Milky Way galaxy, or beyond.

CU �鶹ӰԺ scientist Lauren Blum and her research team has found that electromagnetic waves generated by lightning can trigger electron showers in Earth's atmosphere.

After Explorer 1 launched, though, they noticed that their instrument was detecting significantly higher levels of radiation than expected. Rather than measuring a distant source of radiation beyond our solar system, they appeared to be measuring a local and extremely intense source.

This measurement led to the discovery of the Van Allen radiation belts, two doughnut-shaped regions of high-energy electrons and ions encircling the planet.

Scientists believe that the inner radiation belt, peaking about 621 miles (1000 kilometers) from Earth, is composed of electrons and high-energy protons and is relatively stable over time.

The outer radiation belt, about three times farther away, is made up of high-energy electrons. This belt can be highly dynamic. Its location, density and energy content may vary significantly by the hour in response to solar activity.

The discovery of these high-radiation regions is not only an interesting story about the early days of the space race; it also serves as a reminder that many scientific discoveries have come about by happy accident.

It is a lesson for experimental scientists, myself included, to keep an open mind when analyzing and evaluating data. If the data doesn’t match our theories or expectations, those theories may need to be revisited.

Our curious observations

While I teach the history of the space race in a space policy course at the University of Colorado, �鶹ӰԺ, I rarely connect it to my own experience as a scientist researching Earth’s radiation belts. Or, at least, I didn’t until recently.

In a study led by Max Feinland, an undergraduate student in my research group, we stumbled upon some of our own unexpected observations of Earth’s radiation belts. Our findings have made us rethink our understanding of Earth’s inner radiation belt and the processes affecting it.

Originally, we set out to look for very rapid—sub-second—bursts of high-energy electrons entering the atmosphere from the outer radiation belt, where they are typically observed.

Lightning can generate electromagnetic waves known as lightning-generated whistlers, which can travel through the atmosphere and out into space. (Photo: iStock)

Many scientists believe that a type of electromagnetic wave known as “chorus” can knock these electrons out of position and send them toward the atmosphere. They’re called chorus waves due to their distinct chirping sound when listened to on a radio receiver.

Feinland developed an algorithm to search for these events in decades of measurements from the SAMPEX satellite. When he showed me a plot with the location of all the events he’d detected, we noticed a number of them were not where we expected. Some events mapped to the inner radiation belt rather than the outer belt.

This finding was curious for two reasons. For one, chorus waves aren’t prevalent in this region, so something else had to be shaking these electrons loose.

The other surprise was finding electrons this energetic in the inner radiation belt at all. Measurements from NASA’s Van Allen Probes mission prompted renewed interest in the inner radiation belt. Observations from the Van Allen Probes suggested that high-energy electrons are often not present in this inner radiation belt, at least not during the first few years of that mission, from 2012 to 2014.

Our observations now showed that, in fact, there are times that the inner belt contains high-energy electrons. How often this is true and under what conditions remain open questions to explore. These high-energy particles can damage spacecraft and harm humans in space, so researchers need to know when and where in space they are present to better design spacecraft.

Determining the culprit

One of the ways to disturb electrons in the inner radiation belt and kick them into Earth’s atmosphere actually begins in the atmosphere itself.

Lightning, the large electromagnetic discharges that light up the sky during thunderstorms, can actually generate electromagnetic waves known as lightning-generated whistlers.

CU �鶹ӰԺ researcher Lauren Blum and her colleagues discovered that a combination of weather on Earth and weather in space produces unique electron signatures. (Photo: Pixabay)

These waves can then travel through the atmosphere out into space, where they interact with electrons in the inner radiation belt—much as chorus waves interact with electrons in the outer radiation belt.

To test whether lightning was behind our inner radiation belt detections, we looked back at the electron bursts and compared them with thunderstorm data. Some lightning activity seemed correlated with our electron events, but much of it was not.

Specifically, only lightning that occurred right after so-called geomagnetic storms resulted in the bursts of electrons we detected.

Geomagnetic storms are disturbances in the near-Earth space environment often caused by large eruptions on the Sun’s surface. This solar activity, if directed toward Earth, can produce what researchers term space weather. Space weather can result in stunning auroras, but it can also disrupt satellite and power grid operations.

We discovered that a combination of weather on Earth and weather in space produces the unique electron signatures we observed in our study. The solar activity disturbs Earth’s radiation belts and populates the inner belt with very high-energy electrons, then the lightning interacts with these electrons and creates the rapid bursts that we observed.

These results provide a nice reminder of the interconnected nature of Earth and space. They were also a welcome reminder to me of the often nonlinear process of scientific discovery.

Lauren Blum is an assistant professor in the Department of Astrophysical and Planetary Sciences.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Lightning strikes link weather on Earth and weather in space.

Traditional

White

3 years later, Marshall Fire impacts still being learned

Rachel Sauer — Thu, 02 Jan 2025 21:23:38 +0000

3 years later, Marshall Fire impacts still being learned Rachel Sauer Thu, 01/02/2025 - 14:23

Colleen E. Reid

Wildfire smoke’s health risks can linger in homes that escape burning—as Colorado’s Marshall Fire survivors discovered

On Dec. 30, 2021, a wind-driven wildfire raced through two communities just outside �鶹ӰԺ, Colorado. In the span of about eight hours, more than 1,000 homes and businesses burned.

The fire left entire blocks in ash, but among them, pockets of houses survived, seemingly untouched. The owners of these homes may have felt relief at first. But fire damage can be deceiving, as many soon discovered.

When wildfires like the Marshall Fire reach the wildland-urban interface, they are burning both vegetation and human-made materials. Vehicles and buildings burn, along with all of the things inside them—electronics, paint, plastics, furniture.

Colleen E. Reid, a CU �鶹ӰԺ associate professor of geography, and her research colleagues created a checklist for people to use after urban wildfires in the future to help them protect their health and reduce their risks when they return to smoke-damaged homes.

Research shows that when human-made materials like these burn, the chemicals released are different from what is emitted when just vegetation burns. The smoke and ash can blow under doors and around windows in nearby homes, bringing in chemicals that stick to walls and other indoor surfaces and continue off-gassing for weeks to months, particularly in warmer temperatures.

In a new study released three years after the Marshall Fire, my colleagues and I looked at the health effects people experienced when they returned to still-standing homes. We also created a checklist for people to use after urban wildfires in the future to help them protect their health and reduce their risks when they return to smoke-damaged homes.

Tests in homes found elevated metals and VOCs

In the days after the Marshall Fire, residents quickly reached out to nearby scientists who study wildfire smoke and health risks at the �鶹ӰԺ and area labs. People wanted to know what was in the ash and causing the lingering smells inside their homes.

In homes we were able to test, my colleagues found elevated levels of metals and PAHs – polycyclic aromatic hydrocarbons – in the ash. We also found elevated VOCs – volatile organic compounds – in airborne samples. Some VOCs, such as dioxins, benzene, formaldehyde and PAHs, can be toxic to humans. Benzene is a known carcinogen.

People wanted to know whether the chemicals that got into their homes that day could harm their health.

At the time, we could find no information about physical health implications for people who have returned to smoke-damaged homes after a wildfire. To look for patterns, we surveyed residents affected by the fire six months, one year and two years afterward.

Symptoms six months after the fire

Even six months after the fire, we found that many people were reporting symptoms that aligned with health risks related to smoke and ash from fires.

More than half (55%) of the people who responded to our survey reported that they were experiencing at least one symptom six months after the blaze that they attributed to the Marshall Fire. The most common symptoms reported were itchy or watery eyes (33%), headache (30%), dry cough (27%), sneezing (26%) and sore throat (23%).

All of these symptoms, as well as having a strange taste in one’s mouth, were associated with people reporting that their home smelled differently when they returned to it one week after the fire.

Many survey respondents said that the smells decreased over time. Most attributed the improvement in smell to the passage of time, cleaning surfaces and air ducts, replacing furnace filters, and removing carpet, textiles and furniture from the home. Despite this, many still had symptoms.

We found that living near a large number of burned structures was associated with these health symptoms. For every 10 additional destroyed buildings within 820 feet (250 meters) of a person’s home, there was a 21% increase in headaches and a 26% increase in having a strange taste in their mouth.

These symptoms align with what could be expected from exposure to the chemicals that we found in the ash and measured in the air inside the few smoke-damaged homes that we were able to study in depth.

The Marshall Fire swept through several neighborhoods in Louisville and Superior, Colorado. In the homes that were left standing, residents dealt with lingering smoke and ash in their homes. (Photo: Michael Ciaglo/Getty Images)

Lingering symptoms and questions

There are a still a lot of unanswered questions about the health risks from smoke- and ash-damaged homes.

For example, we don’t yet know what long-term health implications might look like for people living with lingering gases from wildfire smoke and ash in a home.

We found a significant decline in the number of people reporting symptoms one year after the fire. However, 33% percent of the people whose homes were affected still reported at least one symptom that they attributed to the fire. �鶹ӰԺ the same percentage also reported at least one symptom two years after the fire.

We also could not measure the level of VOCs or metals that each person was exposed to. But we do think that reports of a change in the smell of a person’s home one week after the fire demonstrates the likely presence of VOCs in the home. That has health implications for people whose homes are exposed to smoke or ash from a wildfire.

Tips to protect yourself after future wildfires

Wildfires are increasingly burning homes and other structures as more people move into the wildland-urban interface, temperatures rise and fire seasons lengthen.

It can be confusing to know what to do if your home is one that survives a wildfire nearby. To help, my colleagues and I put together a website of steps to take if your home is ever infiltrated by smoke or ash from a wildfire.

Here are a few of those steps:

When you’re ready to clean your home, start by protecting yourself. Wear at least an N95 (or KN95) mask and gloves, goggles and clothing that covers your skin.
Vacuum floors, drapes and furniture. But avoid harsh chemical cleaners because they can react with the chemicals in the ash.
Clean your HVAC filter and ducts to avoid spreading ash further. Portable air cleaners with carbon filters can help remove VOCs.

A recent scientific study documents how cleaning all surfaces within a home can reduce reservoirs of VOCs and lower indoor air concentrations of VOCs.

Given that we don’t know much yet about the health harms of smoke- and ash-damaged homes, it is important to take care in how you clean so you can do the most to protect your health.

Colleen E. Reid is an associate professor in the �鶹ӰԺ Department of Geography.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Wildfire smoke’s health risks can linger in homes that escape burning—as Colorado’s Marshall Fire survivors discovered.

Traditional

White

Top image: Bmurphy380/Wikipedia Commons

Breaking bonds in 'forever chemicals'

Rachel Sauer — Fri, 20 Dec 2024 17:23:20 +0000

Breaking bonds in 'forever chemicals' Rachel Sauer Fri, 12/20/2024 - 10:23

Arindam Sau , Mihai Popescu and Xin Liu

We developed a way to use light to dismantle PFAS ‘forever chemicals’–long-lasting environmental pollutants

Perfluoroalkyl and polyfluoroalkyl substances, or PFAS, have earned the nickname of forever chemicals from their extraordinary ability to stick around in the environment long after they’ve been used.

These synthetic compounds, commonly used in consumer products and industrial applications for their water- and grease-resistant properties, are now found practically everywhere in the environment.

Arindam Sau, a Ph.D. candidate in the CU �鶹ӰԺ Department of Chemistry, along with Colorado State University research colleagues Mihai Popescu and Xin Liu, developed a chemical system that uses light to break down bonds between carbon and fluorine atoms.

While many chemicals will degrade relatively quickly after they’re disposed of, PFAS can stick around for up to 1,000 years. This durability is great for their use in firefighting foams, nonstick cookware, waterproof clothing and even food packaging.

However, their resilience means that they persist in soil, water and even living organisms. They can accumulate over time and affect the health of both ecosystems and humans.

Some initial research has shown potential links between PFAS exposure and various health issues — including cancers, immune system suppression and hormone disruption. These concerns have led scientists to search for effective ways to break down these stubborn chemicals.

We’re a team of researchers who developed a chemical system that uses light to break down bonds between carbon and fluorine atoms. These strong chemical bonds help PFAS resist degradation. We published this work in Nature in November 2024, and we hope this technique could help address the widespread contamination these substances cause.

Why PFAS compounds are so hard to break down

PFAS compounds have carbon-fluorine bonds, one of the strongest in chemistry. These bonds make PFAS incredibly stable. They resist the degradation processes that usually break down industrial chemicals – including hydrolysis, oxidation and microbial breakdown.

Conventional water treatment methods can remove PFAS from water, but these processes merely concentrate the contaminants instead of destroying them. The resulting PFAS-laden materials are typically sent to landfills. Once disposed of, they can still leach back into the environment.

The current methods for breaking carbon-fluorine bonds depend on use of metals and very high temperatures. For example, platinum metal can be used for this purpose. This dependence makes these methods expensive, energy-intensive and challenging to use on a large scale.

How our new photocatalytic system works

The new method our team has developed uses a purely organic photocatalyst. A photocatalyst is a substance that speeds up a chemical reaction using light, without being consumed in the process. Our system harnesses energy from cheap blue LEDs to drive a set of chemical reactions.

After absorbing light, the photocatalyst transfers electrons to the molecules containing fluorine, which breaks down the sturdy carbon-fluorine bonds.

By directly targeting and dismantling the molecular structure of PFAS, photocatalytic systems like ours hold the potential for complete mineralization. Complete mineralization is a process that transforms these harmful chemicals into harmless end products, like hydrocarbons and fluoride ions, which degrade easily in the environment. The degraded products can then be safely reabsorbed by plants.

A wide variety of products can contain PFAS. (Graphic: City of Riverside, California)

Potential applications and benefits

One of the most promising aspects of this new photocatalytic system is its simplicity. The setup is essentially a small vial illuminated by two LEDs, with two small fans added to keep it cool during the process. It operates under mild conditions and does not use any metals, which are often hazardous to handle and can sometimes be explosive.

The system’s reliance on light – a readily available and renewable energy source – could make it economically viable and sustainable. As we refine it, we hope that it could one day operate with minimal energy input, outside of the energy powering the light.

This platform can also transform other organic molecules that contain carbon-fluorine bonds into valuable chemicals. For instance, thousands of fluoroarenes are commonly available as industrial chemicals and laboratory reagents. These can be transformed into building blocks for making a variety of other materials, including medicines and everyday products.

Challenges and future directions

While this new system shows potential, challenges remain. Currently, we can degrade PFAS only on a small scale. While our experimental setup is effective, it will require substantial scaling up to tackle the PFAS problem on a larger level. Additionally, large molecules with hundreds of carbon-fluorine bonds, like Teflon, do not dissolve into the solvent we use for these reactions, even at high temperatures.

As a result, the system currently can’t break down these materials, and we need to conduct more research.

We also want to improve the long-term stability of these catalysts. Right now, these organic photocatalysts degrade over time, especially when they’re under constant LED illumination. So, designing catalysts that retain their efficiency over the long term will be essential for practical, large-scale use. Developing methods to regenerate or recycle these catalysts without losing performance will also be key for scaling up this technology.

With our colleagues at the Center for Sustainable Photoredox Catalysis, we plan to keep working on light-driven catalysis, aiming to discover more light-driven reactions that solve practical problems. SuPRCat is a National Science Foundation-funded nonprofit Center for Chemical Innovation. The teams there are working to develop reactions for more sustainable chemical manufacturing.

The end goal is to create a system that can remove PFAS contaminants from drinking water at purification plants, but that’s still a long way off. We’d also like to one day use this technology to clean up PFAS-contaminated soils, making them safe for farming and restoring their role in the environment.

Arindam Sau is a Ph.D. candidate in the �鶹ӰԺ Department of Chemistry; Mihai Popescu is a postdoctoral associate in chemistry at Colorado State University; Xin Liu is a postdoctoral scholar in chemistry at Colorado State University.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

We developed a way to use light to dismantle PFAS ‘forever chemicals’ – long-lasting environmental pollutants.

Traditional

White

Top image: PFAS foam washed up on beach (Photo: Michigan Department of Environment, Great Lakes and Energy)

Sand verbena uses grains of sand to deter herbivores

Rachel Sauer — Thu, 19 Dec 2024 19:41:09 +0000

Sand verbena uses grains of sand to deter herbivores Rachel Sauer Thu, 12/19/2024 - 12:41

Jeff Mitton

Apparently, herbivores are not fond of chewing sandpaper

Sand verbena, Abronia fragrans, has a moth pollination syndrome, or a suite of floral characters modified by natural selection driven by moth pollination. Its flowers are open all night but closed all day, and long corolla tubes prevent bees from taking nectar but are ideal for moths with long tongues.

Moths follow plumes of floral fragrance from sand verbena until they are within sight of the bright, conspicuous white globes of 25 to 80 flowers, where they sip a nectar reward.

Although sand verbena has a large geographic range, it is limited to sandy habitats in Texas, New Mexico, Arizona, Utah, Colorado, Oklahoma, Kansas, Wyoming, Montana, Nebraska, South Dakota and North Dakota. While sand verbena is described as having white flowers that open only at night, populations in northern Texas and southwestern Oklahoma have a range of flower colors from light pink through fuchsia, and they also differ from most populations in the times that flowers open and close.

The plants with pink or fuchsia flowers remain open until late morning, and they reopen in early evening, allowing considerable visitation by bees and butterflies. Measurements of pollination success in the pink and fuchsia populations showed that diurnal or daytime pollination contributed 18% of the pollination success, in contrast to nothing at all in the remainder of the geographic range of the species.

Dwarf lupine with patches and particles of sand on its flowers, leaves and stem. (Photo: Jeff Mitton)

These data are consistent with the hypothesis that diurnal pollinators were a selective force producing and maintaining novel flower color and diurnal presentation of open flowers in the mornings and late afternoons. The long corolla tubes frustrate bee efforts to collect pollen or nectar but hold nectar available to virtually all butterflies.

Butterflies are visiting diurnally—the most common among them is the skipper Lerodea eufala, the Eufala skipper. These data and other observations suggest the hypothesis that the Eufala skipper applied selective pressure to change flower color from white to pink or fuchsia and to modify the times that flowers open and close.

How could a butterfly apply selection pressure? This terminology unintentionally suggests that the butterflies had a plan and the organization to apply it. But that was not the case. If some flowers did not close exactly at sunrise and if a small butterfly pollinated them, enhancing their seed set, the genes that influenced tardy closing of flowers would become more common in the next generation.

The butterfly did nothing more than sip nectar from a large globe of flowers, nor did the sand verbena do anything to achieve an intended goal. The metric of natural selection is the relative number of offspring produced by competing genotypes of sand verbena. Genes that had been rare produce more seeds, making those genes more common.

Sand verbena is in the genus Abronia, which has about 20 species, all in North and Central America. All thrive in sandy environments, and it is known that 14 of the 20 species have psammophory, a defense to herbivory that is more commonly called sand armor. The armor is assembled when wind-blown sandy grit adheres to sticky exudates on stems and leaves.

I first encountered psammophory when photographing dwarf lupine in the Maze in Canyonlands National Park, and since then I thought it was a rare defense. But a scientific article whose title begins with "Chewing sandpaper" lists more than 200 psammophorous species in 88 genera in 34 families.

Sand armor is not a rare defense; it is geographically widespread and has evolved many times. Experimental studies show that sand armor reduces herbivory—remove it from stems and leaves, and the plant suffers more herbivory than when the armor was intact. Add more sand, and the plant suffers less herbivory.

While sand verbena has a large geographic range, some species of Abronia have tiny geographic distributions. One example is Yellowstone sand verbena, A. ammophila, which is adapted to and endemic (found nowhere else) to the lake shores in Yellowstone National Park.

An obligate relationship was found recently when a new species of moth, Copablepharon fuscum, was discovered in 1995 on the shores of the Salish Sea between Georgia Straight and Puget Sound. The sand-verbena moth was found on just a few beaches and spits on Vancouver Island and Whidbey Island, and it only occupies sites with windblown sand and large and dense populations of A. latifolia, yellow sand verbena, which is found along Pacific Shores from Baja to British Columbia.

The sand-verbena moth uses yellow sand verbena as its host plant, meaning that it is the site of oviposition and the sole food consumed by the caterpillars. The caterpillars have specialized mouth parts allowing them to manipulate around grains of sand.

I know I will never see a sand verbena nor a dwarf lupine without the phrase "chewing sandpaper" popping into my thoughts.

Did you enjoy this article? Subscribe to our newsletter. Passionate about ecology and evolutionary biology? Show your support.

Apparently, herbivores are not fond of chewing sandpaper.

Traditional

White

Top image: Sand verbena usually presents white blooms but response to a pollinator can turn a population pink or fuchsia. (Photo: Jeff Mitton)

Trailing fleabane looks delicate, but it flowered through a drought

Rachel Sauer — Tue, 26 Nov 2024 23:13:46 +0000

Trailing fleabane looks delicate, but it flowered through a drought Rachel Sauer Tue, 11/26/2024 - 16:13

Jeff Mitton

Flower was once thought to repel fleas, a belief long-since debunked

According to the U.S. Drought Monitor, �鶹ӰԺ County was in severe drought in September and the beginning of October this year. On Oct. 14, I went up on Flagstaff Mountain to see what was blooming and to check the condition of some small cacti, Missouri foxtails.

The foxtails were shriveled and seemed to be shrinking into the earth, a common plight for cacti in drought conditions. But my attention quickly shifted to some delicate daisies—these were the only flowers blooming in the prolonged drought.

The flowering species was flowering was Erigeron flagellaris. The plants were about 8 inches tall and had the typical daisy bloom with numerous slender, white petals radiating from a central yellow disc. Erigeron is a large genus in the family Asteraceae, commonly called composites, because each of the blooms is a composite of yellow disc florets in the center and white ray florets radiating.

Each "petal" is a ray floret, a flower that is solely female and fertile. Each of the disc florets is bisexual and fertile. An E. flagellaris bloom has 40 to 125 ray florets and even more disc florets.

In addition to seeds produced by both ray and disc florets, E. flagellaris reproduces asexually by producing stolons, stems that grow horizontally, touching ground at each node.

Erigeron flagellaris, or trailing fleabane, flowers and their mature seeds (Photo: Jeff Mitton)

Contact with the ground stimulates a node to grow a new cluster of roots that support the growth of upright stems, leaves and more flowers. This asexual reproduction creates a spreading clone that, under the best of conditions, resembles a mat. The proliferation of stolons suggests its common names, trailing fleabane and whiplash fleabane. Strawberry plants also spread with stolons, but gardeners usually call them runners.

The genus Erigeron has about 200 species, many of them in North America and all with the common name fleabane. The name, originally from Old English and first used in 1548, comes from the belief that the plant's smell would repel fleas from a dwelling. Plants were either burned or hung in sachets. Both belief and practice were dispelled long ago—fleabanes do not banish fleas.

The Navajo were resourceful at finding preparations of plants that had practical uses for dyes and medicines, and they found a way to use the astringent properties released from crushed leaves of trailing fleabane. They would chew the leaves and then place the moist pulp directly on wounds to stop the bleeding.

Description of the scent of trailing fleabane is elusive. The website Southwest Colorado Wildflowers lists citations in which the scent has been described as spicy, camphor-like, ill-scented, mysterious and downright weird. Chemical studies of fleabanes shows that their fragrances come from essential oils, volatile liquids containing chemical compounds synthesized by the plant.

I was not able to find a study of the essential oil of trailing fleabane, but several other fleabanes have been studied, and all reveal a bewildering diversity of biologically active compounds. For example, a study of the essential oil in E. floribundus, which has the common names tall fleabane and asthma weed, has 85 biologically active compounds. Concentrations of the various compounds differ among fleabane species that have been studied, resulting in a diversity of fragrances.

The constituents in essential oils are undoubtedly expensive to synthesize, but many studies have shown that they contribute to the defense of the plant against herbivores, microbes and fungi. I see a parallel between the essential oils of fleabanes and the resins of pines, firs and spruces.

In fact, limonene is a component of both essential oils and resins. Laboratory studies have shown effective defensive activity of limonene in the oil of E. floribundus, and populations studies have shown that mountain pine beetles eschew ponderosa pines with high levels of limonene.

In summer months, as people camp, hike and generally play in the mountains, one often hears comments about the pleasant fragrance of stands of ponderosa pine, or a spruce and fir forest. But I have never noticed the smell of fleabanes. It is a certainty that herbivores such deer and rabbits note the smell and shun the plants; it is the primary defense of daisies.

The essential oils extracted from several fleabane species can be purchased on the web, but I am sure that sniffing a concentrated concoction of biologically active chemicals from a bottle and nasally inhaling in a field of fleabanes would be different experiences. Let's remember to go fleabane sniffing next summer.

Did you enjoy this article? Subscribe to our newsletter. Passionate about ecology and evolutionary biology? Show your support.

Flower was once thought to repel fleas, a belief long-since debunked.

Traditional

White

Trailing fleabane is small and appears delicate, but it is hardy and well defended. (Photo: Jeff Mitton)

views

Embracing all the joy in Mudville

Off

How March went mad … for basketball

Related Articles

Communities working together for better air

Communities know what needs regulation

How is air quality protected?

Air toxics and health

Related Articles

Nationalism and diplomacy are inherent to international sporting events

Related Articles

It hits Earth like a bolt of lightning

Related Articles

3 years later, Marshall Fire impacts still being learned

Related Articles

Breaking bonds in 'forever chemicals'

Related Articles

Sand verbena uses grains of sand to deter herbivores

Related Articles

Trailing fleabane looks delicate, but it flowered through a drought

Related Articles