John D. Wehr Aquatic Biology Louis Calder Center 53 Whippoorwill Rd., Box 887 Armonk, NY 10504 and Department of Biological Sciences Fordham University 441 E. Fordham Rd. Bronx, NY 10458
Phone: 914-273-3078, ext. 11 Fax: 914-273-2167 E-mail: Wehr@fordham.edu PhD -- 1983, Durham University, England

Current Research Projects

• Ecological Stoichiometry of Benthic Algae and Bryophytes in Stream Foodwebs

• Effects of Dissolved Organic Carbon on Microbial Communities

• Algal Biodiversity and its Effects on Ecosystem Function 

• Importance of Phytoplankton Communities in Large Rivers

• Ecology, Classification and Biogeography of Freshwater Brown Algae

• Calder Center Summer Undergraduate Research Program in Ecology and Field Biology

Research Sites

• Calder Lake and Lake Mesocosms

• Shawangunk Mountain streams and Minnewaska State Park

• New York State streams

• Streams in Western North America

• Upper Mississippi River

Lab Personnel

Staff

Alissa Perrone, Research Technician

Current Graduate Students

Stave DiLonardo.  Research topic: Effects of UV radiation and dissolved organic carbon on freshwater planktonic bacteria. M.S. in progress.

Monica Torres. Research topic: Trophic relationships in northeastern stream ecosystems: the importance of the quality of food sources for macroinvertebrates. PhD in progress.

Past Graduate Students

Toolan, T. 1990. Experimental evidence for orthophosphate limitation of bacterioplankton produc­tion in a meso-eutrophic lake. M.S.

Kostel, F. 1990. Breeding behavior and activity patterns of the Asian freshwater terrapins, Batagur baska and Callagur terrapins. M.S.

Samaritan, J. M. 1993. Influence of alum and acidification on the mobilization and toxicity of metals in a large reservoir. Ph.D.

Le, J. 1996.  Interactions between phytoplankton and heterotrophic bacteria in freshwater. Ph.D.

Gorham, B. 1997.  Snail – macrophyte interactions in a shallow, mesoeutrophic lake in southern New York state. Ph.D.

Fernberg, L.  1997.  Causes and consequences of purple Loosestrife (Lythrum salicaria) invasions on native wetlands. Ph.D.

Huss, A. 1998. Roles of aquatic macrophytes in bacterial metabolism within a mesotrophic lake. M.S.

Petersen, J. 1999. Phylogenetic affiliations and physiological traits of freshwater bacteria. Ph.D.

Eyink, J.  2001. Evaluation of the submersed aquatic macrophyte, Vallisneria americana, as a biomonitor for heavy metals in the Hudson River estuary. M.S.

O’Brien, P. 2002. Effects of urbanization on benthic algal communities in streams of southeastern New York state. M.S.

McCauley, L.A.R. 2002. Phylogenetic relationships of freshwater brown algae (Phaeophyceae) based on RUBISCO large subunit and ribosomal DNA sequences. M.S.

Kamen, J. 2004. The presence of Archaea in freshwater lakes in New York State. M.S.

Representative Publications

For a complete list of publications, click here.
For abstracts of the following publications, click here.

Toolan, T., Findlay, S., & Wehr, J.D. 1991.  Inorganic phosphorus stimulation of bacterioplankton production in a meso-eutrophic lake. Appl Environ Microbiol 57: 2074-2078.

Wehr, J.D. J. Le, & Campbell, L 1994. Does microbial biomass affect pelagic ecosystem efficiency? An experimental study.  Microb Ecol 27: 1-17.

Wehr, J.D. & J.H. Thorp. 1997.  Impacts of navigation dams, tributaries and littoral zones on phytoplankton communities in the Ohio River.  Can J Fish Aquat Sci 54: 378-395.

Wehr, J.D., S.P. Lonergan, & J.H. Thorp. 1997. Concentrations and controls of dissolved organic matter in a constricted-channel region of the Ohio River. Biogeochemistry 38: 41 – 65.

Wehr, J.D. & Descy, J.-P. 1998. Use of phytoplankton in large river management. J Phycol 34: 741-749.

Wehr, J.D., Holen, D.A. MacDonald, M.M.& Lonergan, S.P. 1998. Effects of different carbon sources on a freshwater plankton community. Can J Fish Aquat Sci 55: 2150-2160.

Wehr, J.D., Petersen, J., & Findlay, S. 1999. Influence of three contrasting detrital carbon sources on planktonic bacterial metabolism in a mesotrophic lake.  Microb Ecol 37: 23-35.

Wigand, C., Wehr, J.D., Limburg, K., Gorham, B., Lonergan, S., & Findlay, S. 2000. Effect of Vallisneria americana on community structure and ecosystem function in lake mesocosms.  Hydrobiologia 418: 137-146.

Wehr, J.D. & A.A. Perrone. 2003. A new record of Heribaudiella fluviatilis, a freshwater brown alga (Phaeophyceae) from Oregon. West North Am Naturalist.63: 517-523.

Wehr, J.D. & Sheath, R.G. [Eds.] 2003. Freshwater Algae of North America: Ecology and Classification (24 chapters), Academic Press, San Diego, CA. 950 pp.

Huss, A.A. & Wehr, J.D. 2004. Strong indirect effects of a submersed aquatic macrophyte, Vallisneria americana, on bacterioplankton densities in a mesotrophic lake. Microb Ecol 47: 305-315.

Membership in Professional Societies

• American Association for the Advancement of Science
• American Society of Microbiology
• American Society of Limnology and Oceanography
• Ecological Society of America
• Northeast Algal Society
• Phycological Society of America
• Organization of Biological Field Stations

Links of Interest to Aquatic Ecologists

* Experimental Lakes Area: http://www.umanitoba.ca/institutes/fisheries/home.html
* USGS Water Resources Program: http://water.usgs.gov/
* North Temperate Lakes LTER - Trout Lake, Wisconsin: http://www.lternet.edu/network/sites/15_ntl.html
* Freshwater Biological Association, U.K.: http://www.ife.ac.uk/FBA/
* North American Benthological Society: http://www.benthos.org/
* Australian Society for Limnology: http://www.ntu.edu.au/science/mdouglas/asl_home.html
* Cyanosite: a web site for Cyanobacterial research: http://www-cyanosite.bio.purdue.edu/index.html
* Bowling Green State U. - Center for Algal Microscopy & Image Digitization: http://www.bgsu.edu/departments/biology/algae/index.html
* California Academy of sciences Diatom Collection: http://www.calacademy.org/research/diatoms/
* Society of Wetland Scientists: http://www.sws.org/
* South Florida Water Management District: http://www.sfwmd.gov/
* North American Lake Management Society: http://www.nalms.org/
* USGS Real time hydrological data: http://h2o.usgs.gov/public/realtime.html

Page last updated 1/10/05 by Craig L. Frank (Frank@fordham.edu)