This paper evaluates both the ideas and empirical evidence pertaining to the control of species density in herbaceous plant communities. While most theoretical discussions of species density have emphasized the importance of habitat productivity and disturbance regimes, many other factors (e.g. species pools, plant litter accumulation, plant morphology) have been proposed to be important. A review

Authors

J.B. Grace

Ecosystems Mission Area, Wetland and Aquatic Research Center

January 1, 1999

Spatial and temporal patterns of nonindigenous fish introductions in the United States

In 1978 biologists in Gainesville, Florida, began compiling records on the distribution and status of nonindigenous fishes known in U.S. inland waters. The database, now in electronic format, currently contains approximately 17,000 records representing more than 500 nonindigenous fish taxa (i.e., species, hybrids, and unidentified forms). Of these taxa, 317 (61%) are native to the United States bu

Authors

L.G. Nico, P.L. Fuller

Ecosystems Mission Area, Wetland and Aquatic Research Center

January 1, 1999

Parasites and commensals of the West Indian manatee from Puerto Rico

Metazoan parasites and commensals were collected from dead manatees salvaged in Puerto Rico. Thirty-five manatees were examined between 1980 and 1998. Parasites and commensals were identified in 20 (57%) manatees and included 3 species of helminths, 1 nematode (Heterocheilus tunicatus) and 2 digeneans (Chiorchis fabaceus and Cochleotrema cochleotrema). Two species of commensals were also associate

Authors

A. A. Mignucci-Giannoni, C.A. Beck, R. A. Montoya-Ospina, E.H. Williams

Ecosystems Mission Area, Wetland and Aquatic Research Center

Publications

Book review: Monitoring vertebrate populations

Book review: The bone sharp. The life of Edward Drinker Cope.

Individual-based models in ecology: An overview

Geographic distribution: Ambystoma talpoideum (Mole salamander)

The use of modeling in restoration ecology: The Everglades case

A comparative study of stream habitat and substrate utilized by Corbicula fluminea in the New River, Florida

Conservation of aquatic karst Biotas: shedding light on troubled waters

Family Cepolidae

Family Carangidae

The factors controlling species density in herbaceous plant communities: An assessment

Spatial and temporal patterns of nonindigenous fish introductions in the United States

Parasites and commensals of the West Indian manatee from Puerto Rico

U.S. Geological Survey

U.S. Department of the Interior