EEB Department Seminar

From eebedia

Revision as of 11:32, 4 March 2008 by PaulLewis (Talk | contribs)
Jump to: navigation, search


Almost every week during the fall and spring semesters the EEB has a departmental seminar in which a member of the faculty invites a researcher to give a presentation about their work. Typically the department seminar is held on Thursdays at 4pm in BPB 130. Often the seminar presenter will be available on campus for one or two days prior to their talk, in order to meet with interested students and faculty by appointment. EEB department seminars sometimes alternate with seminars in the Edwin Way Teale Lecture Series, which occur less frequently. One departmental seminar per year is organized by the graduate students, who invite the speaker and arrange his or her schedule. The department also holds the Monday Evening Seminar periodically throughout the semester. Schedules from previous semesters are archived here.

For this week's seminar speaker sign-up page, click here.

Spring 2008 Regular Seminars

07 January 2008

Lauren B. Buckley

The distribution dynamics of reptiles and amphibians in changing environments
4:00PM in BPB 130
Mechanistic distribution models that link individual energetics and population dynamics enable investigating how morphology, physiology, and behavior influence species’ responses to environmental change. I discuss developing and field testing the models for Caribbean lizards along elevation gradients. I then apply the models to investigate the range implications of geographic trait variation among populations of North American lizards. The predicted extent of the northward range shift following climate warming depends on population traits. The research highlights the limitations of correlative range models and demonstrates the importance of considering adaptation, species’ interactions, and dispersal limitations when predicting ranges. Ongoing work aims to incorporate these biotic factors into mechanistic distribution models. I close by considering the broader context of energetic, ecological, and phylogenetic constraints on global patterns of reptile abundance and amphibian diversity in changing environments.

10 January 2008

Brian J. McGill

Patterns and processes in the variation of abundance between species and across space
4:00PM in BPB 130
Understanding the abundance and density of organisms (number of individuals per area) is a central question in ecology for both basic and applied reasons. Using the Breeding Bird Survey it is possible to partition variance across space, time, and taxon. The somewhat surprising results show that the largest component is actually variance within one species across space, a relatively unexplored pattern. Considerable variance also occurs between species, but about half of this variance is deeply conserved in the phylogeny. I will present a theory that explains local variation in abundance (also known as the species abundance distribution) using a stochastic spatial approach. I will then explore what is known about the mechanisms explaining the assumptions underlying this theory

14 January 2008

Shannon LaDeau

The ecological drivers and consequences of West Nile virus in North America
4:00PM in BPB 130
Emerging infectious diseases present a formidable challenge to the conservation of native species. However, identifying the impacts of an introduced pathogen and distinguishing it from other forces that influence population dynamics is complex. Here, twenty potential avian hosts are examined for West Nile virus (WNV) impact across their North American population ranges. Significant changes in population trajectories, including dramatic declines, are demonstrated for seven species from four families and are consistent with a priori predictions and pathogen dispersal. Spatial and temporal heterogeneity in West Nile virus impact suggest important interactions among pathogen amplification, human land use and climate. These findings illustrate the potential consequences of pathogen emergence for a diverse faunal assemblage across broad geographic scales and underscore the complexity of subsequent community response.

17 January 2008

Mark Urban

Understanding species interactions across multiple spatial scales: why evolution matters
4:00PM in BPB 130
Generalizable theories in community ecology require that insights derived from local communities can be scaled up to explain species interactions across larger spatial scales. Adaptation and gene flow can play an increasingly important role in shaping species interactions across distant communities. Here, I explore how evolution alters the dynamics of species interactions in metacommunities – sets of communities linked by dispersal – through theory and experiments. In simulated metacommunities, I show that dispersal-mediated evolutionary and ecological dynamics interact to alter expectations of community assembly and species richness. Next, I examine how adaptation and gene flow shape the survival of pond salamander populations in New England that face heterogeneous predation risks from size-selective predators. Under common garden conditions, prey differed in their susceptibility to predation and foraging rates depending on their population and region of origin. A demographic model of adaptive prey foraging in response to size-selective predators accurately predicted evolved responses in salamander foraging rates and variation in survival patterns. However, nearby populations had more similar foraging rates than expected by chance, suggesting that gene flow also affects prey survival. Results demonstrate that spatial heterogeneity in predation risk, local adaptation, and gene flow from nearby populations shape salamander predator-prey interactions. An evolutionary perspective on metacommunities offers multiple future research avenues that address how adaptation and gene flow govern community invasibility, assembly, and richness. My work on pond salamanders in New England offers an empirical foundation on which to test these ideas in the future.

21 January 2008

Allen Hurlbert

Resource-based determinants of species richness: testing species-energy theory
4:00PM in BPB 130
Broad-scale patterns of species diversity have captured the attention of biologists for over two hundred years. Historically examined as a latitudinal diversity gradient, the global pattern has generated a large number of hypotheses over the past several decades. Unfortunately, most of these potential explanatory variables co-vary strongly with latitude and with each other, making it difficult to distinguish among hypotheses. I present two tests of one hypothesis, species-energy theory, that seek to disentangle the variable of interest, resource availability, from latitude and other co-variates. I first show that the geographical pattern of species richness in birds varies between the summer and winter as predicted by a simple model that equates spatial and seasonal variation in resource availability. I next present an experimental test of species-energy theory using Panamanian Drosophila communities in artificial microcosms. Both studies confirm the importance of resource availability for structuring ecological communities and for contributing to broad-scale patterns such as the latitudinal diversity gradient and species-area relationships.

24 January 2008

Sallie Sheldon (Middlebury College)

Biological control with a twist: Using a native insect to control an invasive exotic plant
4:00PM in BPB 130
Host: Don Les

31 January 2008

Derek Briggs (Yale University)

Virtual fossils from a Silurian volcanic ash
4:00PM in BPB 130
Host: Andrew Bush

05 February 2008 (Tuesday)

Robert Naiman (University of Washington)

Rainforests and savannas: Understanding ecological processes in riverine floodplains
3:30PM in BPB 131 (note unusual time and venue)
Host: Eric Schultz

12 February 2008 (Tuesday)

Hiroyoshi Higuchi (University of Tokyo)

The ecology of bird migration in East Asia, with implications for conservation and the spread of disease
4:00PM in BPB 130
Host: John Silander

21 February 2008

Scott Edwards (Harvard University)

Multilocus approaches to avian phylogeography and phylogenetics
4:00PM in BPB 130
Host: Elizabeth Jockusch
Selected papers:
Pdficon small.gif Edwards, S. V., S. Birks, R. T. Brumfield, and R. Hanner. 2005. Future of avian genetic resources collections: archives of evolutionary and environmental history. The Auk 122: 979-984.
Pdficon small.gif Walsh, H. E. and S. V. Edwards. 2005. Conservation genetics and Pacific fisheries bycatch: Mitochondrial differentiation and population assignment in black-footed albatrosses (Phoebastria nigripes). Conservation Genetics 6: 289-295.

28 February 2008

Justin Schaefer (Brown University)

Skeletal morphology and wing biomechanics in batoid elasmobranches: stiffening squishy structures sans Cialis
4:00PM in BPB 130
Host: Eric Schultz
Pdficon small.gif Schaefer, J. T., and A. P. Summers. (2005) Batoid wing skeletal structure: novel morphologies, mechanical implications, and phylogenetic patterns. Journal of Morphology. 264: 298-313.

06 March 2008

Amy Zanne (National Evolutionary Synthesis Center)

Wood density and sapwood hydraulic function: Trait trade-offs and coordination
4:00PM in BPB 130
Host: Robin Chazdon
Pdficon small.gif Zanne, A. E., C. A. Chapman, and K. Kitajima. 2005. Evolutionary and ecological correlates of early seedling morphology in East African trees and shrubs. American Journal of Botany. 92: 972-978.
Pdficon small.gifZanne, A. E. and C. A. Chapman. 2005. Diversity of woody species in forest, treefall gaps, and edge in Kibale National Park, Uganda. Plant Ecology. 178: 121-139.

03 April 2008

Maureen Donnelly (Florida International University)

Grad-Invited Seminar
4:00PM in BPB 130
Host: EEB Graduate Student Association

17 April 2008

Monique Turmel (Université Laval)

4:00PM in BPB 130
Host: Bernard Goffinet

24 April 2008

Dan Rabosky

4:00PM in BPB 130
Host: Chris Simon

1 May 2008

Reed Noss (University of Central Florida)

4:00PM in BPB 130
Host: Chris Elphick

8 May 2008

Krissa Skogen

1:00PM in BPB 130

Spring 2008 Teale Lectures

07 February 2008

Ivette Perfecto (University of Michigan)

Brewing biodiversity: the ecology of coffee farms in Chiapas, Mexico
4:00PM in Konover Auditorium, Dodd Center

20 March 2008

Roger Gottlieb (Worcester Polytechnic Institute)

Hope in a dark time: The promises of religious environmentalism
4:00PM in Konover Auditorium, Dodd Center

10 April 2008

Joseph Bruchac

This Earth, Our Mother
4:00PM in Konover Auditorium, Dodd Center

Personal tools