Department of Biology

Scientists at the University of Washington have discovered that nighttime air pollution â coming primarily from car exhaust and power plant emissions â is responsible for a major drop in nighttime pollinator activity. Nitrate radicals (NO3) in the air degrade the scent chemicals released by a common wildflower, drastically reducing the scent-based cues that its chief pollinators rely on to locate the flower. The findings, published Feb. 9 in Science, are the first to show how nighttime pollution creates a chain of chemical reactions that degrades scent cues, leaving flowers undetectable by smell. The researchers also determined that pollution likely has worldwide impacts on pollination.

Dogs share so much of their lives with humans and can develop the same health conditions we do, like dementia or diabetes. Those similarities drove researchers to wonder if our medical science can help dogs live longer — and if maybe, our furry friends could tell us something about how we age, too. Daniel Promislow, professor of biology and of laboratory medicine and pathology at the UW, is quoted.

At the the 2024 annual meeting of the Society for Integrative and Comparative Biology in Seattle, researchers discussed the increased use of artificial intelligence and machine learning for learning about things like spiders, bats, bees, elephants and other creatures. Jeff Riffell, a professor of biology at the UW, is quoted.

The National Institute on Aging may let funding lapse for a yearslong study of nearly 50,000 pet dogs, which could also offer insight into human health. Daniel Promislow, professor of biology and of laboratory medicine and pathology at the UW, is quoted.

Alejandro Rico-Guevara, assistant professor of biology at the UW and curator of ornithology at the UW Burke Museum, has dedicated his life to looking at hummingbirds in ways other people can’t. What he’s learned changed the world’s understanding of hummingbirds and, at times, has been of great use to humans.

Organizers hope to save long-running project on canine aging and longevity. Daniel Promislow, professor of biology and of laboratory medicine and pathology at the UW, is quoted.

As several athletic programs announce their move to a new conference, a group of sleep and circadian scientists and physicians dive into the impacts of increased travel on student-athletes. The UW's Horacio de la Iglesia, professor of biology; Dr. Russ Van Gelder, professor of ophthalmology; and Michael Dillon, associate athletic director for health and wellness, are quoted.

Six University of Washington subjects ranked in the top 10, and atmospheric sciences maintained its position as No. 1 in the world on the Global Ranking of Academic Subjects list for 2023. The ranking, released at the end of October, was conducted by researchers at the ShanghaiRanking Consultancy, a fully independent organization dedicated to research on higher education intelligence and consultation.

Hunting later at night may force the big cats to surrender their prey to larger carnivores, such as lions and leopards. Kasim Rafiq, a UW postdoctoral researcher in biology, is quoted.

Even the fastest animal in the world can't outrun the effects of climate change, according to experts. Cheetah populations are especially vulnerable to rising temperatures because hotter days are forcing them to behave more nocturnally, putting them in greater competition with other predators such as lions and African wild dogs, according to a study published in the journal Biological Sciences on Wednesday. Kasim Rafiq, postdoctoral scholar of biology at the UW, is quoted.

Cheetahs are usually daytime hunters, but the speedy big cats will shift their activity toward dawn and dusk hours during warmer weather, a new study finds. The UW's Briana Abrahms, assistant professor of biology, and Kasim Rafiq, postdoctoral scholar of biology, are quoted.

The first week of November brings the end of Daylight Saving Time and return of Standard Time. Reporter Corey Olson sat down with UW Biology professor Horacio de la Iglesia to discuss the health benefits of staying in Standard Time permanently.

Briana Abrahms serves as the Boersma Endowed Chair of Natural History and Conservation at UW, and recently received the prestigious Packard Fellowship. Abrahms’ lab will receive $875,000 to pursue research regarding the impacts of environmental change on animal behavior. Writer Samuel Abraham sits down with the professor and distills her ongoing research.

Some are stubborn optimists. Others struggle with despair. Their faces show the weight they carry as they witness the impact of climate change. Kristin Laidre, associate professor of aquatic and fishery sciences at the UW and principal scientist at the Applied Physics Laboratory, and P. Dee Boersma, professor of biology at the UW, are featured.

The diverse dental features found among bats might help fill gaps in our understanding of how mammal teeth evolved. Scientists from the UW, publishing in Nature Communications, analysed and compared the jaws and teeth of more than 100 noctilionoid bats, revealing the developmental rules that explain the diverse range of dental features. Pictures from Sharlene Santana, professor of biology at the UW, are featured.