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Southeastern freshwater fishes Southeastern freshwater fishes

North America has the richest fauna of temperate freshwater fishes in the world, with about 800 native species in the waters of Canada and the United States. The center of this diversity is in the southeastern United States, where as many as 500 species may exist (62% of the continental fauna north of Mexico). Many coastal marine species also enter fresh waters of the Southeast, and at...
Authors
Stephen J. Walsh, Noel M. Burkhead, James D. Williams

Florida manatees Florida manatees

The endangered Florida manatee (Trichechus manatus latirostris) is a survivor. It is one of only three living species of manatees which, along with their closest living relative, the dugong (Dugong dugon), make up the Order Sirenia. This taxonomic distinctiveness reflects their evolutionary and genetic uniqueness. Sirenians are the only herbivorous marine mammals; manatees feed on...
Authors
Lynn W. Lefebvre, Thomas J. O’Shea

Amphibians Amphibians

Amphibians are ecologically important in most freshwater and terrestrial habitats in the United States: they can be numerous, function as both predators and prey, and constitute great biomass. Amphibians have certain physiological (e.g., permeable skin) and ecological (e.g., complex life cycle) traits that could justify their use as bioindicators of environmental health. For example...
Authors
R. Bruce Bury, P. Stephen Corn, C. Kenneth Dodd, Roy W. McDiarmid, Norman J. Scott

Nonindigenous fish Nonindigenous fish

Abstract not supplied at this time
Authors
C.P. Boydstun, P.L. Fuller, J.D. Williams

An alternative bacteriological medium for the isolation of Aeromonas spp. An alternative bacteriological medium for the isolation of Aeromonas spp.

Two solid bacteriologic media were compared for cultivating Aeromonas spp. from piscine sources: the Rimler-Shotts (RS) medium and a starch-glutamate-ampicillin-penicillin-based medium (SGAP-10C) used for the recovery of Aeromonas spp. from water samples. The selective and differential capacities of the media were assessed March through October 1992 by recovery rate and phenotype of 99...
Authors
J.A. Jenkins, P.W. Taylor

The effects of vertebrate herbivory on plant community structure in the coastal marshes of the Pearl River, Louisiana, USA The effects of vertebrate herbivory on plant community structure in the coastal marshes of the Pearl River, Louisiana, USA

In this study, we investigated the impacts of herbivory by the introduced aquatic herbivore, nutria (Myocastor coypus), on three marsh communities of the Pearl River using fenced exclosures and control plots. Although total community above-ground biomass was reduced by 30% in the plots exposed to herbivory as compared to those protected from herbivory, we found species richness to be...
Authors
K.L. Taylor, J.B. Grace

Monitoring flooding in coastal wetlands by using radar imagery and ground-based measurements Monitoring flooding in coastal wetlands by using radar imagery and ground-based measurements

Satellite radar was used in a Florida Juncus roemerianus marsh to map tidal flooding, a critical control of coastal vegetation distribution. Radar images taken during a time of near-continuous recordings of ground-based hydrology measurements directly linked marsh flooding to lowered radar returns and indicated a negative covariation between flood frequency and radar return. Flood-extent...
Authors
Elijah Ramsey
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