Publications
Explore WARC's science publications.
Filter Total Items: 3377
Unionid mollusks of the Apalachicola Basin in Alabama, Florida, and Georgia
No abstract available.
Authors
Jayne Brim-Box, James D. Williams
Determining the size of American alligators using hind-foot track length
Size distribution information is useful for crocodilian management, but can be hard to obtain. Indirect and less costly demographic inferences made from track measurements may be valuable for management decisions. We related hind-foot lengths (HF) with total length (TL) to determine if we could indirectly assess alligator size using track length. Regression showed that HF was an excellent predicto
Authors
Philip M. Wilkinson, Kenneth G. Rice
Estimating sighting proportions of American alligator nests during helicopter survey
Proportions of American alligator (Alligator mississippiensis) nests sighted during aerial survey in Florida were estimated based upon multiple surveys by different observers. We compared sighting proportions across habitats, nesting seasons, and observer experience levels. The mean sighting proportion across all habitats and years was 0.736 (SE=0.024). Survey counts corrected by the mean sighting
Authors
Kenneth G. Rice, H. Franklin Percival, Allan R. Woodward
Cottus paulus: A replacement name for the pygmy sculpin, Cottus pygmaeus Williams 1968
A replacement name, Cottus paulus, is proposed for the Pygmy Sculpin, Coitus pygmaeus. The name Coitus pygmaeus was preoccupied by Coitus quadricornis pygmaeus Lonnberg (1932).
Authors
J.D. Williams
Vegetation associations in a rare community type - Coastal tallgrass prairie
The coastal prairie ecoregion is located along the northwestern coastal plain of the Gulf of Mexico in North America. Because of agricultural and urban development, less than 1% of the original 3.4 million ha of this ecosystem type remains in native condition, making it one of the most endangered ecosystems in North America. The objective of this study was to characterize the vegetation and enviro
Authors
James B. Grace, Larry K. Allain, Charles Allen
Fire ecology in the southeastern United States
Fire has played an important role in the structure of natural ecosystems throughout North America. As a natural process, fire helps clear away dead and dying plant matter and increases the production of native species that occur in fire prone habitats. It also reduces the invasion of exotic species and the succession to woody species in pitcher plant bogs, pine savannas, coastal prairies, marshes,
Authors
Louisiana coastal ecosystem
Louisiana's coast and its degradation and restoration are major environmental issues being studied at the National Wetlands Research Center. Coastal ecosystems are vulnerable because of the tremendous amount of human activity that takes place along the coast. Information on ecological processes is essential to guide the development along the coast as well as to protect and restore wildlife habitat
Authors
Seagrasses in northern Gulf of Mexico: An ecosystem in trouble
The USGS National Wetlands Research Center has documented that Seagrasses in the northern Gulf of Mexico constitute an ecosystem in trouble. From studies in St. Andrews Bay, Period Bay, the Chandeleur Islands, and the Gulf Islands National Seashore, scientists have discovered that declining seagrass acreage ranges from 12% to 66% in bays and estuaries of the Gulf of Mexico. Not only are seagrasses
Authors
Assessment of the effect of road construction and other modifications on surface-water flow at St. Vincent National Wildlife Refuge, Franklin County, Florida
St. Vincent National Wildlife Refuge is managed by the U.S. Fish and Wildlife Service (USFWS). The refuge was acquired in 1968 from a private land owner and occupies all of St. Vincent Island, a barrier island located off the southern coast of the Florida Panhandle near Apalachicola (fig. 1). The island, which covers 12,358 acres, is about 9 miles long and 4 miles across at its widest point. Eight
Authors
J. Hal Davis, Michael F. Mokray
Natural resource and ecosystem costs of coastal hazards
Describes the topic of natural resource and ecosystem costs of coastal hazards through the work of the John Heinz III Center for Science, Economics and the Environment.
Authors
H. Kunreuther, R. Platt, S. Baruch, R. Bernknopf, M. Buckley, V. Burkett, D. Conrad, T. Davidson, K. Deutsch, D. Geis, M. Jannereth, A. Knap, H. Lane, G. Ljung, M. McCauley, D. Mileti, T. Miller, B. Morrow, J. Meyers, R. A. Pielke, A. Pratt, J. Tripp
Abiotic and biotic controls of spatial pattern at alpine treeline
At alpine treeline, trees and krummholz forms affect the environment in ways that increase their growth and reproduction. We assess the way in which these positive feedbacks combine in spatial patterns to alter the environment in the neighborhood of existing plants. The research is significant because areas of alpine tundra are susceptible to encroachment by woody species as climate changes. Moreo
Authors
George P. Malanson, Ningchuan Xiao, K.J. Alftine, Mathew Bekker, David R. Butler, Daniel G. Brown, David M. Cairns, Daniel Fagre, Stephen J. Walsh
Pattern and process of land loss in the Mississippi Delta: A spatial and temporal analysis of wetland habitat change
An earlier investigation (Turner 1997) concluded that most of the coastal wetland loss in Louisiana was caused by the effects of canal dredging, that loss was near zero in the absence of canals, and that land loss had decreased to near zero by the late 1990s. This analysis was based on a 15-min quadrangle (approximately 68,000 ha) scale that is too large to isolate processes responsible for small-
Authors
John W. Day, Gary P. Shaffer, Louis D. Britsch, Denise J. Reed, Suzanne Hawes, Donald R. Cahoon