This spring semester, two Bard biology students (Maia Weisenhaus and Sadie Marvel) were enrolled in a microscopy tutorial with professor Brooke Jude. Every week they would come up with new ideas for projects, and then figured out how to do them as they went along. In the words of one of the students: “It’s fun to learn these microscopy techniques without the formal structure of being in a class. It’s very exploratory!”
You can see more photos from the tutorial on the tutorial tumblr.
Five biology students brought their senior project posters to the Hudson Valley Life Science Group (HVLSG) Spring Research Symposium, which was held at Vassar college this year. The conference was a blast, with about 30 students participating, and a great keynote lecture about frogs and owls (by Vassar professor Megan Gall).
Bard students enrolled in the Field Methods in Ecology course, taught by professor Cathy Collins, spent spring break in Costa Rica at the Firestone Center for Restoration Ecology. Students designed and executed studies to characterize rainforest microclimates, estimate diversity and abundance of butterflies, and quantify the biomass removed from the forest canopy by leaf cutter ants–all while being surrounded by the sloths, monkeys, anteaters, tarantulas, and toucans!
You can read more about their experience on the course blog, and see more photos at the blog photo album!
This winter the lab of professor Brooke Jude published nine draft genomes of bacteria endemic to the Hudson Valley watershed. This work is a result of several senior projects performed in the Biology program, and three graduated biology students (Alexandra Bettina, Georgia Doing, and Kelsey O’Brien) are now first authors on three publications!
Bettina, A. M., Doing, G., O’Brien, K., Perron, G. G., & Jude, B. A. (2018). Draft Genome Sequences of Phenotypically Distinct Janthinobacterium sp. Isolates Cultured from the Hudson Valley Watershed. Genome announcements, 6(3), e01426-17.
Doing, G., Perron, G. G., & Jude, B. A. (2018). Draft Genome Sequence of a Violacein-Producing Iodobacter sp. from the Hudson Valley Watershed. Genome announcements, 6(1), e01428-17.
O’Brien, K., Perron, G. G., & Jude, B. A. (2018). Draft Genome Sequence of a Red-Pigmented Janthinobacterium sp. Native to the Hudson Valley Watershed. Genome announcements, 6(1), e01429-17.
In this new paper, Bard professor Elias Dueker and collaborators study microbes that fly in the air, after small droplets of water get lifted from the ocean surface by the coastal wind. They found that depending on the wind speed, different amounts of microbes were picked up, and they were transported different distances into the city. They also described which types of microbes are more likely to get airborne, compared to those found below the water surface.
Citation: Dueker, M. E., O’Mullan, G. D., Martínez, J. M., Juhl, A. R., & Weathers, K. C. (2017). Onshore Wind Speed Modulates Microbial Aerosols along an Urban Waterfront. Atmosphere, 8(11), 215.
Animals caught in ‘ecological traps’ prefer the worst available habitats. This happens when environmental change makes habitats look superficially attractive when they are actually dangerous. Ecological traps are increasingly common, but it remains unclear how susceptible animals are to them. Aquatic flies, for example, can be highly attracted to asphalt because it reflects polarized light the same way that natural water bodies do.
In this study, Bard professor Bruce Robertson and his students exposed seven ecologically similar species of aquatic flies to different levels of polarized light, including abnormally strong polarized light associated with man-made habitats that are dangerous to them. They found that, in every species tested, animals actually preferred levels of polarized light typical of asphalt where their eggs perish, over levels typical of natural ponds. We also found that the degree of their preference depended on whether the cue was closer or more distant from a natural river.
Citation: Robertson, B. A., Keddy-Hector, I. A., Shrestha, S. D., Silverberg, L. Y., Woolner, C. E., Hetterich, I., & Horváth, G. (2018). Susceptibility to ecological traps is similar among closely related taxa but sensitive to spatial isolation. Animal Behaviour, 135, 77-84.
In the fall 2017, Assistant Professor of Biology, Eli Dueker, was awarded a grant from the New York State Department of Environmental Conservation for his work with the Saw Kill Watershed Community (SKWC), which he founded. The goal of the project is to improve understanding about connections between land-use and stream/watershed conditions. SKWC will develop and implement long-term planning to help preserve the watershed and reduce threats and will expand regionally by reaching out to neighboring watershed community groups.
Read more: https://sagehouse.blog/2017/11/20/college-and-community-a-watershed-partnership/
In her senior project, Biz Osborne-Schwartz’ 17 sought to improve oral rehydration therapies (ORT) for cholera patients. Working with her advisor, Professor Brooke Jude, Biz developed a protocol to study the attachment of Vibrio cholerae to chitin (a stand-in for a human intestinal cell) and other carbohydrates. This new protocol allowed her to test if adding a certain type of chemical compounds, called enzyme resistant carbohydrates, to ORT could decrease the number of bacteria in a patient infected with cholera. Biz observed a decrease in Vibrio cholerae attached to chitin beads when incubated in ORT with enzyme resistant starches, which means that more complex ORT are promising for cholera patients!
In November 2017, Bard alum Silas Busch ’16 presented the work he did during his Bard senior project at a professional society meeting “Society for Neuroscience” in Washington DC. His poster won a travel award from the David Hubel Memorial Fund (distributed through the Faculty for Undergraduate Neuroscience society).
In his work, Silas studied how neural cells in the brain of frog tadpoles change their spiking properties when tadpoles experience different types of visual and auditory stimuli. To measure neuronal properties, Silas used a fancy electrophysiological technique, called Dynamic Clamp. He found that neurons become tuned to better process stimuli perceived by the brain, and that when visual and auditory stimuli are combined, it leads to interesting, and somewhat unexpected changes in neuronal tuning.
Presentation info: S.E. Busch, A.S. Khakhalin. Midbrain neurons show temporal retuning of intrinsic properties in response to patterned uni- and multisensory stimulation. Wed Nov 15, 2017. Washington DC.