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Dr. David L. Strayer

Freshwater Ecologist | PhD, 1984, Cornell University

Expertise
Hudson River, invasive species, streams

Dave Strayer is a freshwater ecologist whose current work focuses on measuring the long-term effects of zebra mussels on the Hudson River ecosystem, and understanding the roles of suspension-feeding animals in ecosystems. Strayer also works on broader issues in freshwater conservation ecology and invasion biology.

Species introductions are one of the most important ways by which humans affect the Earth’s ecosystems. Strayer has been involved in much research in this area, particularly regarding the zebra mussel. This tiny bivalve arrived in North America from Europe in the 1980s and has caused hundreds of millions of dollars in economic damage and widespread ecological change.

Water clarity, water chemistry, food webs, and populations of native species, including fish, in the Hudson River all changed after zebra mussels arrived. Now, decades after their first appearance, Strayer and Cary scientists see evidence of fundamental long-term changes in the relationship between the river and the invader. The Cary group has been tracking this changing relationship for almost 30 years, providing one of the longest and most detailed case studies in invasion ecology.

Strayer also works on the ecology and conservation of native pearly mussels, a highly diverse and imperiled group of animals. He wrote Freshwater Mussel Ecology: A Multifactor Approach to Distribution and Abundance.

Zebra mussels and pearly mussels are examples of suspension-feeders – animals that feed by removing tiny particles from the water. These animals can have large, pervasive effects on aquatic ecosystems.  Strayer is currently working to synthesize information and understanding of freshwater suspension-feeders across a wide range of species and ecosystems.

In addition to his scientific publications, Strayer has written several dozen essays for the general public, which are collected in The Lost Snail of the Yangtze and Other Essays.

Kornijow, R., David L. Strayer, and Nina F. Caraco. 2010. “Macroinvertebrate Communities of Hypoxic Habitats Created by an Invasive Plant (Trapa Natans) in the Freshwater Tidal Hudson River”. Fundam. Appl. Limnol. 176: 199-207. http://www.caryinstitute.org/reprints/Kornijow_2010_FAL.pdf.
Pace, Michael L., David L. Strayer, David T. Fischer, and Heather M. Malcom. 2010. “Recovery of Native Zooplankton Associated With Increased Mortality of an Invasive Mussel”. Ecosphere 1: W07415. doi:10.1890/ES10-00002.1.
Carlsson, N. O. L., O. Sarnelle, and David L. Strayer. 2009. “Native Predators and Exotic Prey – an Acquired Taste?”. Front. Ecol. Environ. 7: 525-32. http://www.caryinstitute.org/reprints/carlsson_et_al_Frontiers.pdf.
Strayer, David L. 2009. “Twenty Years of Zebra Mussels: Lessons from the Mollusk That Made Headlines”. Front. Ecol. Environ. 7. doi:10.1890/080020.
Strayer, David L., and Edward W. McNeil. 2009. “Avoiding the Transport of Invasive Species by Seaplane”. Water Flying.
Strayer, David L. 2009. “Benthic Invertebrate Fauna, Lakes and Reservoirs”. In G. E. Likens (ed.). Encyclopedia of Inland Waters, Volume 2., 191-204. Oxford: Elsevier. http://www.caryinstitute.org/reprints/strayer_EIWA_zoobenthos_2009.pdf.
Strayer, David L. 2009. “Gastrotricha (2009)”. In G. E. Likens (ed.). Encyclopedia of Inland Waters, Volume 2., 317-22. Oxford: Elsevier. http://www.caryinstitute.org/reprints/strayer_EIWA_gastrotrichs_2009.pdf.
Carlsson, N. O. L., and David L. Strayer. 2009. “Intraspecific Variation in the Consumption of Exotic Prey – a Mechanism That Increases Biotic Resistance Against Invasive Species?”. Freshwater Biol. 54: 2315-19.
Jeschke, Jonathan M., and David L. Strayer. 2008. “Are Threat Status and Invasion Success Two Sides of the Same Coin?”. Ecography 31: 124-30. http://www.caryinstitute.org/reprints/Jeschke_Strayer_Ecography_2008.pdf.
Strayer, David L., Michael L. Pace, Nina F. Caraco, Jonathan J. Cole, and Stuart E. G. Findlay. 2008. “Hydrology and Grazing Jointly Control a Large-River Food Web”. Ecology 89: 12-18. http://www.caryinstitute.org/reprints/Strayer_et_al_2008_Ecology.pdf.

Articles by David Strayer