Publications
Explore WARC's science publications.
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Habitat Suitability Index Models: Northern pintail (gulf coast wintering) Habitat Suitability Index Models: Northern pintail (gulf coast wintering)
A review and synthesis of existing information were used to develop a model for evaluating wintering habitat quality for northern pintail (Anas acuta) along the Gulf of Mexico coast. The model is scaled to produce an index between unsuitable habitat) and 1.0 (optimal habitat). Habitat suitability index models are designed for use with the Habitat Evaluation Procedures previously...
Authors
Rebecca J. Howard, Harold A. Kantrud
Development of a computerized wetlands mapping data base for use in section 404 jurisdictional determinatins in San Francisco Bay Development of a computerized wetlands mapping data base for use in section 404 jurisdictional determinatins in San Francisco Bay
Development and habitat alteration in the San Francisco Bay-Delta system have placed the remaining wetlands in jeopardy. The Bay-Delta wetlands will be mapped in a joint project of the U. S. Environmental Protection Agency (EPA) and the U. S. Fish and Wildlife Service (FWS). Maps at a 1:24,000 scale will be produced for the entire study area. High altitude color infrared photography from...
Authors
Patrick J. Cotter, James B. Johnston, Millicent L. Quammen, Dennis Peters
Analysis of colonial wading bird habitat in coastal Louisiana Analysis of colonial wading bird habitat in coastal Louisiana
No abstract available.
Authors
R.D. Greer, C.E. Keller
Interactions among temporary and permanent meiofauna: Observations on the feeding and behavior of selected taxa Interactions among temporary and permanent meiofauna: Observations on the feeding and behavior of selected taxa
Meiofauna diets and behavioral patterns are relatively unknown despite the fact that in any system, predatory relationships and behavioral responses may play an important role in determining community structure. Therefore, observations on food preferences, feeding behavior, and encounter interactions of members of a meiofauna assemblage were made in the laboratory in dishes of natural...
Authors
Mary C. Watzin
Estuary-wide mitigation options for port development in Tampa Bar, Florida Estuary-wide mitigation options for port development in Tampa Bar, Florida
No abstract available.
Authors
Steve Dial, Millicent L. Quammen, Don Deis, James B. Johnston
Contaminant concentrations in manatees in Florida Contaminant concentrations in manatees in Florida
The status of the endangered manatee (Trichehus manatus) in relation to organochlorine pesticides, polychlorinated biphenyls, mercury, lead, cadmium, copper, iron, and selenium was investigated in Florida from 1977 to 1981. Concentrations of organochlorines in blubber, mercury in muscle and liver, lead in liver, and lead and cadmium in kidneys did not indicate high exposure to these...
Authors
Thomas J. O’Shea, John F. Moore, Howard I. Kochman
Use of color and color infrared in coastal resource programs Use of color and color infrared in coastal resource programs
No abstract available.
Authors
James B. Johnston
Texas barrier island region ecological characterization atlas: Biological resources narrative Texas barrier island region ecological characterization atlas: Biological resources narrative
No abstract available.
Authors
James B. Johnston
Adaptive variation in offspring size in the terrestrial isopod, Armadillidium vulgare Adaptive variation in offspring size in the terrestrial isopod, Armadillidium vulgare
Variation in the birth size of offspring of the terrestrial isopod, Armadillidium vulgare, was observed in laboratory experiments and in field populations. In the laboratory, larger offspring were produced when the mother's food supply was reduced. In field populations, larger offspring were produced during the summer, a period of reduced food availability. Smaller offspring are produced...
Authors
M.S. Brody, L.R. Lawlor
Mapping of forested wetland: Use of seasat radar images to complement conventional sources Mapping of forested wetland: Use of seasat radar images to complement conventional sources
Distinguishing forested wetland from dry forest using aerial photographs has been handicapped because photographs often do not reveal the presence of water below the tree canopies. Images obtained during the summer months of 1978 by the Seasat satellite's L-band (23-cm) radar reveal forested wetland as patterns of high radar reflection in the Atlantic coastal plain between Maryland and...
Authors
John L. Place