Dr. Donald F. Charles

(Indiana University, 1982)

Phycology Section Website

Diatoms as water quality indicators; paleolimnological approaches for inferring change in biology and chemistry of lakes; lake management; assessment of perturbations in aquatic ecosystems due to municipal and industrial effluents, land-use change, acid deposition, eutrophication and climate change.

Dr. Richard J. Horwitz

(University of Chicago, 1976)


Reproductive ecology, life history and distribution of freshwater fishes; effects of land use, habitat structure and hydrology on population dynamics and species composition in aquatic systems; ecological modeling and biometry; anthropogenic contaminants in fishes.

Dr. Marie J. Kurz

Environmental Biogeochemistry
(University of Florida, 2013)


Hydro-eco-geochemical controls on the sources and cycling of solutes in aquatic ecosystems; Reciprocal interactions between solute availability, transport & retention, and ecosystem structure & function; Groundwater-surface water interactions; Linking catchment-scale patterns in solute & ecosystem dynamics to process understanding; Restoration & management of water resources & aquatic ecosystems.

Dr. Sonja Hausmann

(University of Bern, 2001)

Office: 215-299-1135
Lab: 215-299-1102

Identification of diatoms from lake or stream samples; development of water quality criteria for lakes and streams using diatoms archived in lake sediments or from benthic samples; quantitative reconstruction of climate change or eutrophication using diatoms.

Dr. Elizabeth Burke Watson

(University of California, Berkeley, 2006)

Google Scholar Profile

Dr. Elizabeth Watson is a wetland scientist interested in the responses of coastal estuaries and to human impacts and climate change, and the role of wetlands in global biogeochemical cycles. Current projects include the implementation and success of coastal climate-adaptation strategies in southern New England, developing indicators of nutrient enrichment for Long Island, NY estuaries, using CT scans to visualize belowground biomass of wetland plants, toxicological effects of macroalage, and the 150-year reconstruction of cumulative nitrogen pollution in Narragansett Bay, Rhode Island.

Dr. David J. Velinsky

Environmental Biogeochemistry
(Old Dominion University, 1987)


Geochemical cycling of organic and inorganic constituents of sediments and waters; Sedimentary diagenesis of major and minor elements; Isotope biogeochemistry of carbon, nitrogen and sulfur in marine and freshwater systems.

Dr. Velinsky is the Department Head for the Department of Biodiversity, Earth & Environmental Science at Drexel University.

Dr. Stefanie Kroll

(SUNY - ESF, 2012)


Macroinvertebrates as bioindicators, stream ecosystem integrity relative to land use and human activities, climate change effects on aquatic ecosystems, restoration ecology, measuring ecosystem change in dynamic conditions.

Research Associates

Dr. Jeffrey T. F. Ashley

(University of Maryland, 1998)


Sources, transport, and fate of bioaccumulative, persistent organic contaminants in natural waters; modeling the bioaccumulation of pollutants in aquatic food webs; the role of eutrophication in determining organic contaminant exposure to organisms; environmental analytical chemistry, assessment of contaminated fisheries.

Dr. Raymond W. Bouchard

(University of Tennessee, 1972)

Systematics, zoogeography, evolution, ecology and functional morphology of Holarctic crayfishes; ecology of neotropical phytotelmata; systematics and zoogeography of neotropical freshwater decapod crustaceans.

Senior Aquatic Entomologist

Brett Marshall, M.Sc.

Aquatic Insects
(Virginia Tech)

(406) 282-0050

Effects of environmental changes on the structure and function of aquatic ecosystems and aquatic insect assemblages; secondary production and life-history; bioassessment impact or risk assessment; limitations of bioassessment methods when applied to address ecological questions. Visit to occasionally view highlights of cutting edge findings.

Environmental Research