Posts tagged diversity
NEW CU-BOULDER STUDY REVEALS BACTERIA FROM DOG FECES IN OUTDOOR AIR OF URBANIZED AREAS
Aug 18th
NEW CU-BOULDER STUDY REVEALS BACTERIA FROM DOG FECES IN OUTDOOR AIR OF URBANIZED AREAS
Bacteria from fecal material — in particular, dog fecal material — may constitute the dominant source of airborne bacteria in Cleveland’s and Detroit’s wintertime air, says a new University of Colorado Boulder study.
The CU-Boulder study showed that of the four Midwestern cities in the experiment, two cities had significant quantities of fecal bacteria in the atmosphere — with dog feces being the most likely source.
“We found unexpectedly high bacterial diversity in all of our samples, but to our surprise the airborne bacterial communities of Detroit and Cleveland most closely resembled those communities found in dog poop,” said lead author Robert Bowers, a graduate student in CU-Boulder’s ecology and evolutionary biology department and the CU-headquartered Cooperative Institute for Research in Environmental Sciences, or CIRES. “This suggests that dog poop may be a potential source of bacteria to the atmosphere at these locations.”
The study was published July 29 in Applied and Environmental Microbiology. Co-authors on the study included Noah Fierer, an assistant professor in CU-Boulder’s ecology and evolutionary biology department and a CIRES fellow; Rob Knight, an associate professor in CU-Boulder’s chemistry and biochemistry department; Amy Sullivan and Jeff Collett Jr. of Colorado State University; and Elizabeth Costello of the Stanford University School of Medicine.
Scientists already knew that bacteria exist in the atmosphere and that these bacteria can have detrimental effects on human health, triggering allergic asthma and seasonal allergies, Fierer said. But it is only in recent years that researchers have realized that there is an incredible diversity of bacteriaresiding in the air, he said.
“There is a real knowledge gap,” said Fierer. “We are just starting to realize this uncharted microbial diversity in the air — a place where you wouldn’t exactly expect microbes to be living.”
To gain further understanding of just what microbes are circulating in urban environments, the team analyzed the local atmosphere in the summer and winter at four locations in the Great Lakes region of the U.S. Three of the locations — Chicago, Cleveland and Detroit — are major cities with populations of greater than 2 million, and one location, Mayville, Wis., is a small town with a population of less than 6,000.
The team used nearly 100 air samples collected as part of a previous study conducted by Colorado State University. The CSU experiment investigated the impact of biomass burning and involved studying the impacts of residential wood burning and prescribed fires on airborne fine particle concentrations in the midwestern United States.
“What we’ve been looking at are the numbers and the types of bacteria in the atmosphere,” Fierer said. “We breathe in bacteria every minute we are outside, and some of these bugs may have potential health implications.”
The researchers analyzed the bacteria’s DNA in the collected air samples and compared the bacteria they found against a database of bacteria from known sources such as leaf surfaces, soil, and human, cow and dog feces. They discovered that the bacterial communities in the air were surprisingly diverse and also that, in two of the four locations, dog feces were a greater than expected source of bacteria in the atmosphere in the winter.
In the summer, airborne bacteria come from many sources including soil, dust, leafsurfaces, lakes and oceans, Bowers said. But in the winter, as leaves drop and snow covers the ground, the influence that these environments have as sources also goes down. It is during this season that the airborne communities appeared to be more influenced by dog feces than the other sources tested in the experiment, he said.
“As best as we can tell, dog feces are the only explanation for these results,” Fierer said. “But we do need to do more research.”
The team plans to investigate the bacterial communities in other cities and to build a continental-scale atlas of airborne bacterial communities, Fierer said. “We don’t know if the patterns we observed in those sites are unique to those cities,” he said. “Does San Francisco have the same bacteria as New York? Nobody knows as yet.”
Fierer believes it is important to pin down the types of bacteria in the air, how these bacteria vary by location and season, and where they are coming from.With this information, scientists can then investigate the possible impacts on human health, he said.
“We need much better information on what sources of bacteria we are breathing in every time we go outside,” Fierer said.
The study was funded by the CIRES Innovative Research Program, the U.S.
Environmental Protection Agency, the National Science Foundation, the Howard Hughes Medical Institute and the National Institutes of Health. The aerosol sample collection for this project was supported by the Lake Michigan Air Directors Consortium.
One-of-a-kind, natural surface bike park to open June 11 in Boulder
Jun 6th
Media interview opportunities available in advance of Valmont Bike Park grand opening
What do you call 40 acres of twisting trails, mild to wild dirt, structural jumps, strategically-placed sand pits, logs, boulders and staircases? While off-road cyclists may soon call it, “Shangri La,” we call it, “Valmont Bike Park.”
Opening for the first time at 9 a.m. Saturday, June 11, the City of Boulder Parks and Recreation Department’s latest park development has already been hailed as an outstanding bike park by the International Mountain Biking Association (IMBA).
“Cyclists from around the nation will be totally floored by what they see,” said IMBA Executive Director Mike Van Abel. “Based on its many options for riding natural-surface trails, the diversity of both technical and non-technical features and the outstanding quality of the build, Valmont will be among the top venues in the country for this style of biking.”
The City of Boulder’s Parks and Recreation Department will open the newly-developed park with a grand opening event from 9 a.m. to 4 p.m. on Saturday, June 11. The event will feature an official ribbon-cutting ceremony at 10 a.m. with comments from council members, including Deputy Mayor Ken Wilson and Parks and Recreation Director Kirk Kincannon. Food and bicycle gear vendors, a cycling demonstration (on the park’s slopestyle features) and public riding in the park will round out the day’s activities. The event is free and open to the community.
The park contains a pump track, dual slalom and slopestyle riding loop as well as elements for a competition cyclo-cross course. The park also includes training and skill building trails, a toddler playground, event plaza, restrooms, parking and outstanding city and Flatiron views. Developed with the support and partnership of the local cycling community, Boulder Mountainbike Alliance (BMA) and organizations such as the PLAY Boulder Parks Foundation and Great Outdoors Colorado, the 40-acre Valmont Bike Park encompasses natural-surface amenities for multiple riding styles and skill levels.
“We are very excited to open this flagship park,” Kincannon said. “We invested in a collaborative partnership with BMA and the off-road cycling community to design and build this portion of Valmont City Park. The result is a park worthy of our internationally-recognized athletic community—one that will be a daily asset to local kids, families, riders and businesses and also attract events and riders from all over the country and the world.”
Note to Media: Media interviews with Parks and Recreation Department Director Kirk W. Kincannon will be available on a scheduled basis on June 7 and 8. The media is encouraged to attend the grand opening event on June 11. Please contact Shelly Ruspakka by June 7 at RuspakkaS@BoulderColorado.gov or 303-413-7214 to set up a media interview or to discuss plans for the opening event.
The bike park is currently closed due to allow completion of construction. The park will open to cycling on June 11. No footage of park use or demonstrations will be available until June 11.
MAJORITY OF CU-BOULDER STUDENTS REPORT POSITIVE CAMPUS EXPERIENCE, ACCORDING TO SOCIAL CLIMATE SURVEY
Jun 1st
In an extensive survey of the University of Colorado Boulder’s nearly 30,000 students, overwhelming majorities of respondents had an approving view of the campus’s social climate — the extent to which CU-Boulder makes students feel welcome, valued and supported. Around four in five respondents reported feeling intellectually stimulated often or very often. A similar proportion said they felt welcome and accepted, and nearly nine in ten said they felt comfortable in their classes.
The survey, done in fall 2010, was the latest edition of CU-Boulder’s Social Climate Survey, conducted about every four years since 1994 by the university’s Office of Planning, Budget and Analysis, or PBA. The online survey was sent to 29,926 degree-seeking undergraduate and graduate students, and completed by 7,777, or 26 percent.
The favorable view of CU-Boulder’s social climate was generally shared by all subgroups studied — men and women, undergraduate and graduate students, students in all of the university’s schools and colleges, politically liberal and conservative students, students in fraternities and sororities, students who are the first in their family to attend college, gay and straight students, students from all socioeconomic backgrounds, students of different races and ethnicities, students with physical or psychological disabilities, nontraditional-age students, students who entered as freshmen and transfers, international students, students affiliated with the military, and students with different religious affiliations, including Catholics, other Christians, Jews, Muslims, Buddhists and nonbelievers. Membership in these self-identified subgroups was determined using survey responses provided by the students.
Overall, students described the campus as friendly and welcoming, with 80 percent of both undergraduate and graduate students reporting feeling welcome and accepted either often or very often. Eighty-eight percent said they feel comfortable in their classes, and 80 percent reported feeling intellectually stimulated. Large majorities described CU-Boulder as “accepting of diverse perspectives” in the classroom, 81 percent, and outside the classroom, 63 percent.
On a broad measure of feeling welcome and comfortable on campus and in the Boulder community, students who self-identified in diverse subgroups generally reported a positive experience — averaging about 4 on the 5-point scale. Although the positive assessment of the campus’s social climate was shared across all subgroups, two subgroups of at least 100 respondents did rate it slightly lower — around 3.5 — African-American students and students who characterized themselves as having a psychological or psychiatric disability such as depression or post-traumatic stress disorder. Their ratings were, however, still above the scale midpoint of 3.0. There was also a tendency for slightly less positive evaluations of the campus social climate by GLBT students, nontraditional-age students, students of lower socioeconomic status, very liberal students, very conservative students, students not affiliated with a fraternity or sorority, transfer students, and students affiliated with the Buddhist and Muslim faiths. Their ratings were, nevertheless, well above the neutral point on the scale.
Comprising 149 scaled questions, plus another six open-ended questions, the survey collected a massive amount of information — over a million responses to the ratings, and nearly 23,000 written comments, amounting to half a million words. The thousands of student comments include praise for particular classes that addressed diversity issues, suggestions to increase enrollment of international students and to make tuition more affordable for low-income students, reports of uncomfortable situations involving derogatory comments about women or gays or people of color, descriptions of personal experiences with religious or political prejudice, and accounts of situations that led to better understanding between people of different backgrounds. One student wrote, “Thanks for continuing to educate people on these issues, I feel like a much bigger and better person since I came to CU.”
Differences in survey results across 2001, 2006 and 2010 indicate an overall trend of small but consistent and wide-ranging improvements in the social climate on the CU-Boulder campus. For example, students’ level of comfort taking part in campus social life was higher in 2010, as were the average levels of feeling welcome, accepted, supported and intellectually stimulated at CU-Boulder. In all three surveys, African-American undergraduate students perceived the climate at CU-Boulder somewhat less favorably than did undergraduates of other races/ethnicities. Compared with 2001 and 2006, however, African-American undergraduates in 2010 reported feeling more welcome on the Boulder campus and more comfortable participating in campus social life and life on the Hill. Other students also reported feeling more welcome and comfortable in 2010.
A campus advisory board representing a wide range of campus units helped guide the survey and data analysis, including the assistant vice chancellor for diversity, equity and community engagement, the associate vice chancellor for undergraduate education, faculty, and representatives from student government, Disability Services, the GLBT Resource Center, Religious Campus Organizations, Wardenburg Health Center, the Office of Orientation, the Center for Multicultural Affairs and the Women’s Resource Center.
The survey’s findings are used primarily to evaluate, revise and develop programs and policies that promote student success by helping all students feel like valued members of the university community. PBA and members of the survey’s advisory board have been working together to distribute the results and encourage their use throughout the university community.
“For several years, the Office of Diversity, Equity and Community Engagement has worked with several campus community committees to assess and maintain the social climate for all students, especially as it impacts learning in and outside the classroom, as well as staff and faculty,” said Alphonse Keasley, assistant vice chancellor for diversity and equity. “The results of the latest survey will be most instructive in the ways that various Chancellor Advisory Committees can continue to recommend diversity and inclusion needs to ODECE and senior level administrators that are central to the campus’s mission and purpose.”
The results will also be used by academic affairs. “The Office of Undergraduate Education will be using specific results of this campus climate survey to fine tune or modify specific programs which have a significant focus on improving the welcoming climate we want for our students,” said Michael Grant, associate vice chancellor for undergraduate education. “For example, our McNeil, Daniels, Ethnic Living and Learning and Academic Excellence programs, among others, all work with students who may find understanding and fitting into a research university environment a particular challenge for it is often a really new and different cultural environment. This is also the case for many international students.”
