People

Staff

Dr. Donald F. Charles

Phycology
(Indiana University, 1982)

215-299-1090
charles@ansp.org
Phycology Section Website
CV

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

Fisheries
(University of Chicago, 1976)

215-299-1092
horwitz@ansp.org
CV

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. Jerry V. Mead

Watershed and Systems Ecology
(SUNY College of Environmental Science and Forestry, 2007)

215-405-5091
mead@ansp.org
CV

Spatial modeling of aquatic ecosystems; bioenergetics of aquatic invertebrates and fishes; effects of water level management on aquatic organisms; biophysical economics and watershed planning; stream geomorphology and environmental conditions; economics and bioconservation; energy and fisheries.

Dr. Sonja Hausmann

Phycology
(University of Bern, 2001)

Office: 215-299-1135
Lab: 215-299-1102
Sonja.Hausmann@drexel.edu 
http://diatom.ansp.org/Sonja_Hausmann

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

Wetlands
(University of California, Berkeley, 2006)

215-299-1109
elizabeth.b.watson@drexel.edu
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)

215-299-1147
velinsky@ansp.org
CV

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.

Research Associates

Dr. Jeffrey T. F. Ashley

Biogeochemistry
(University of Maryland, 1998)

215-299-1076
ashley@ansp.org

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

Macroinvertebrates
(University of Tennessee, 1972)

bouchard@ansp.org

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
brett@rivercontinuum.org

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 www.RiverContinuum.org/blog to occasionally view highlights of cutting edge findings.

Environmental Research