EPA Science Inventory

Geographic, Anthropogenic and Habitat Influences on Great Lakes Coastal Wetland Fish Assemblages

Citation:

TREBITZ, A. S., J. C. BRAZNER, N. DANZ, M. S. PEARSON, G. S. PETERSON, D. K. TANNER, D. L. TAYLOR, C. W. WEST, AND T. HOLLENHORST. Geographic, Anthropogenic and Habitat Influences on Great Lakes Coastal Wetland Fish Assemblages. CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES. NRC Research Press, Ottawa, Canada, 66(8):1328-1342, (2009).

Description:

We analyzed data from coastal wetlands across all five Laurentian Great Lakes to identify patterns in fish assemblages and relationships to local habitat, watershed condition, and regional setting. NMDS ordination of electrofishing catch-per-effort data revealed an overriding geographic and anthropogenic stressor gradient that was strongly related to water clarity, vegetation structure, and fish composition. Wetlands in Lake Erie and lower Lake Michigan with agricultural watersheds, turbid water, little submerged vegetation, and a preponderance of generalist, tolerant fishes occupied one end of this gradient while wetlands in Lake Superior with largely natural watersheds, clear water, abundant submerged vegetation, and diverse fish communities occupied the other. Fish composition was also related to wetland morphology, hydrology, exposure, and substrate, but this was only evident when examining the less-disturbed wetlands. Anthropogenic disturbance appears to homogenize fish composition among coastal wetlands and mask other fish - habitat associations. Because land use is strongly spatially patterned across the Great Lakes and because aquatic vegetation is a key habitat element that responds to both biogeography and disturbance, it is difficult to disentangle natural from anthropogenic drivers of fish composition.

Purpose/Objective:

The objectives are to use assemblage ordination techniques to examine Great Lakes coastal wetland fish patterns on a basin-wide scale, and to relate them to geographic setting, anthropogenic impacts, and wetland habitat.

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Start Date: 08/11/2009
Completion Date: 08/11/2009
Record Last Revised: 08/14/2009
Record Created: 07/23/2008
Record Released: 07/23/2008
OMB Category: Other
Record ID: 198076

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LAB

MID-CONTINENT ECOLOGY DIVISION

ECOSYSTEM ASSESSMENT RESEARCH