David Velinsky, Ph.D.

VP for Science; Department Head; Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Fate and transport of chemical and other contaminants in water systems, especially in estuaries near urban centers. Profile

Donald Charles, Ph.D.

Senior Scientist, Phycology, and Professor, Department of Biodiversity, Earth & Environmental Science, Drexel University
Expertise: Ecology of freshwater diatoms and their use as indicators to assess current and past environmental conditions. Profile

Carol R. Collier, P.P., AICP

Senior Advisor for Watershed Management & Policy;
Director, Environmental Studies and Sustainability Program (ENSS), Department of Biodiversity, Earth & Environmental Science

Expertise: Experienced leader in regional watershed management and policy. Profile

Richard Horwitz, Ph.D.

Senior Scientist, Fisheries Section Leader, Ruth Patrick Chair of Environmental Sciences, Patrick Center for Environmental Research; Associate Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Reproductive ecology, life history and distribution of freshwater fishes; effects of land use on species. Profile

Marina Potapova, Ph.D.

Assistant Curator, Diatoms; Assistant Professor, Department of Biodiversity, Earth & Environmental Science, Drexel University
Expertise: Ecology and taxonomy of freshwater diatoms and their use to monitor human impacts. Profile

Stefanie A. Kroll

Project Science Director, Acting Macroinvertebrate Section Leader, Patrick Center of Environmental Research; Assistant Research Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Watershed and stream ecology, aquatic macroinvertebrate ecology and as bioindicators, restoration ecology, human stressors on aquatic ecosystems, climate change. Profile.

Marie J. Kurz

Research Scientist & Biogeochemistry Section Leader, Patrick Center for Environmental Research; Assistant Research Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Hydro-bio-geochemical controls on the sources and cycling of solutes in freshwater ecosystems; Reciprocal interactions between ecosystem function and solute availability, transport and retention; Groundwater-surface water interactions; Linking catchment-scale patterns in solute and ecosystem dynamics to process understanding; (Adaptive) management of water resources and aquatic ecosystems. Profile

Elizabeth Burke Watson

Wetlands Section Leader, Patrick Center for the Environmental Research; Assistant Professor of Wetlands Science, Department of Biodiversity, Earth and Environmental Science
Expertise:Wetlands Ecology, Global Change, Ecohydrology, Paleoecology, Spatial Analyses. Profile

Roland Wall

Wetlands Section Leader, Patrick Center for the Environmental Research; Assistant Professor of Wetlands Science, Department of Biodiversity, Earth and Environmental Science
Expertise:Wetlands Ecology, Global Change, Ecohydrology, Paleoecology, Spatial Analyses 

Edward Daeschler, Ph.D

Associate Curator of Vertebrate Zoology; Associate Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Evolution of early tetrapods, including Tiktaalik roseae, and the collecting and describing of fossils. Profile

Ned Gilmore

Collection Manager, Vertebrate Paleontology
Expertise: Late Cretaceous and Early Tertiary fossils of eastern North America. Profile

John Lundberg, Ph.D.

Emeritus Curator; Emeritus Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Biogeography, vertebrate morphology and paleobiology of fish, especially from South America. Co-principal of the global All Catfish Species Inventory. Profile

Mark Henry Sabaj Peréz, Ph.D.

Collection Manager, Ichthyology
Expertise: Catfishes, South American rivers and fishes, taxonomy and evolution. Co-principal of the global All Catfish Species Inventory. Profile

Jon Gelhaus, Ph.D.

Curator, Department of Entomology; Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Systematics and ecology of worldwide crane flies. Leader of the Mongolian Aquatic Insect Survey, including water quality research in Mongolia. Co-leader of New Jersey Pinelands (Pine Barrens) insect survey. Profile

Jason Weintraub

Collection Manager, Entomology
Expertise: Biogeography, ecology, and evolution of worldwide butterflies and moths. Profile

Greg Cowper

Curatorial Assistant, Entomology
Expertise: Systematics, evolution, and biogeography of Heteroptera, the true bugs; history of entomology.

Nathan Rice, Ph.D.

Associate Curator of Ornithology; Associate Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Evolutionary biology of neotropical bird groups, especially antbirds and their relatives. Profile

Jason Weckstein, Ph.D.

Tatyana Livshultz, Ph.D.

Assistant Curator of Botany; Assistant Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Evolution and pollination of plants, especially the milkweed and dogbane family. Profile

Rick McCourt, Ph.D.

Associate Curator of Botany & Director of the Center for Systematic Biology and Evolution; Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Evolution and systematics of green algae. Profile

Ned Gilmore 

Collection Manager, Mammalogy and Herpetology
Expertise: Mammals of Pennsylvania, New Jersey and Delaware. Profile

Marina Potapova, Ph.D.

Assistant Curator, Diatoms; Assistant Professor, Department of Biodiversity, Earth & Environmental Science
Expertise: Ecology and taxonomy of freshwater diatoms and their use to monitor human impacts. 
Profile

Jocelyn Sessa

Assistant Curator, Invertebrates; Assistant Professor, Department of Biodiversity, Earth & Environmental Science
Expertise:Paleoecology, ocean acidification, extinction recovery dynamics, global warming. Profile.