Biology Seminar: Spring 2018

  • 2/1 – Introduction and orientation
  • 2/8 – Chris Vecsey – Skidmore College – Sleeping on the Fly: Studying Fruit Flies to Learn About Mechanisms of Sleep Regulation
  • 2/15 – Kerri-Ann Norton – Bard College – The Influence of the Host Microenvironment on Breast Cancer Progression: Investigations Using a Computational Biology Approach
  • 2/22 – Susan Elbin – Audubon
  • 3/1 – Olorunseun Ogunwobi – Hunter College – MicroRNA-1207-3p in Prostate Cancer
  • 3/8 – Steven Franks – Fordham University – Evolutionary Responses to Climate Change Revealed by the Resurrection Approach
  • 3/15 – Carmen Melendez-Vasquez – Hunter College – Myelinating Glia Differentiation is Regulated by the Mechanical Properties of the Extracellular Matrix
  • 3/29 – Matteo Farinella – Columbia University – Comics and Science
  • 4/5 – Robyn Smyth – Bard Center for Environmental Policy
  • 4/12 – Bruce Robertson – Bard College
  • 4/19 – Felicia Keesing – Bard College – The Tick Project: Testing environmental interventions to prevent tick-borne diseases
  • 4/26 – Arseny Khakhalin – Bard College – Neural network connectivity in the brain of tadpoles that helps them detect impeding collisions
  • 5/3 – Student talks

New paper: Onshore Wind Speed and Microbial Aerosols at Urban Waterfronts

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 WaterfrontAtmosphere8(11), 215.

New paper: Susceptibility to ecological traps is sensitive to spatial isolation

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 isolationAnimal Behaviour135, 77-84.

Saw Kill Watershed Community grant

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/

Student Research: Biz Osborne-Schwartz

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!

Student research: Silas Busch

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.