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Dive into the research topics where M. Brian Gregory is active.

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Featured researches published by M. Brian Gregory.


Urban Ecosystems | 2009

Relation of urbanization to stream fish assemblages and species traits in nine metropolitan areas of the United States

Larry R. Brown; M. Brian Gregory; Jason T. May

We examined associations of fish assemblages and fish traits with urbanization and selected environmental variables in nine major United States metropolitan areas. The strongest relations between fishes and urbanization occurred in the metropolitan areas of Atlanta, Georgia; Birmingham, Alabama; Boston, Massachusetts; and Portland, Oregon. In these areas, environmental variables with strong associations (rs ≥ 0.70) with fish assemblages and fish traits tended to have strong associations with urbanization. Relations of urbanization with fish assemblages and fish traits were weaker in Denver, Colorado; Dallas-Fort Worth, Texas; Milwaukee-Green Bay, Wisconsin; and Raleigh, North Carolina. Environmental variables associated with fishes varied among the metropolitan areas. The metropolitan areas with poor relations may have had a limited range of possible response because of previous landscape disturbances. Given the complexities of urban landscapes in different metropolitan areas, our results indicate that caution is warranted when generalizing about biological responses to urbanization.


Ecohydrology | 2008

Relating streamflow characteristics to specialized insectivores in the Tennessee River Valley: a regional approach

Rodney R. Knight; M. Brian Gregory; Amy K. Wales


Scientific Investigations Report | 2004

Sharing of Ribotype Patterns of Escherichia Coli Isolates During Baseflow and Stormflow Conditions

Peter G. Hartel; Elizabeth A. Frick; Adrienne L. Funk; Jennifer L. Hill; Jacob D. Summer; M. Brian Gregory


Water-Resources Investigations Report | 2002

Water quality and aquatic communities of upland wetlands, Cumberland Island National Seashore, Georgia, April 1999 to July 2000

Elizabeth A. Frick; M. Brian Gregory; Daniel L. Calhoun; Evelyn H. Hopkins


Scientific Investigations Report | 2008

Algal and Invertebrate Community Composition along Agricultural Gradients: A Comparative Study from Two Regions of the Eastern United States

Daniel L. Calhoun; M. Brian Gregory; Holly S. Weyers


Archive | 2007

Water Availability for Ecological Needs In The Upper Flint River Basin, Georgia— A USGS Science Thrust Project

W. Brian Hughes; Mary C. Freeman; M. Brian Gregory; James T. Peterson


Scientific Investigations Report | 2007

Chapter B. Physical, Chemical, and Biological Responses of Streams to Increasing Watershed Urbanization in the Piedmont Ecoregion of Georgia and Alabama, 2003

M. Brian Gregory; Daniel L. Calhoun


Archive | 2007

RESPONSE OF STREAM FISH ASSEMBLAGES TO AN URBANIZATION GRADIENT IN METROPOLITAN ATLANTA, GEORGIA

M. Brian Gregory; Daniel L. Calhoun


Fact Sheet | 2006

Water Availability for Ecological Needs in the Upper Flint River Basin, Georgia

M. Brian Gregory; Mary C. Freeman; W. Brian Hughes


Archive | 2003

Water Quality and Upland Wetland Aquatic Communities of Cumberland Island, Georgia, 1999–2000

Elizabeth A. Frick; M. Brian Gregory; Daniel L. Calhoun; Evelyn H. Hopkins

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Daniel L. Calhoun

United States Geological Survey

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W. Brian Hughes

United States Geological Survey

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Mary C. Freeman

United States Geological Survey

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Amy K. Wales

Tennessee Valley Authority

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Holly S. Weyers

United States Geological Survey

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James T. Peterson

United States Geological Survey

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Jason T. May

United States Geological Survey

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Larry R. Brown

United States Geological Survey

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