Publications
Explore WARC's science publications.
Filter Total Items: 3505
On the use of path analysis and related procedures for the investigation of ecological problems On the use of path analysis and related procedures for the investigation of ecological problems
No abstract available.
Authors
James B. Grace, Bruce H. Pugesek
Resource management of forested wetlands: Hurricane impact and recovery mapped by combining Landsat TM and NOAA AVHRR data Resource management of forested wetlands: Hurricane impact and recovery mapped by combining Landsat TM and NOAA AVHRR data
A temporal suite of NOAA Advanced Very High Resolution Radiometer (AVHRR) images, transformed into a vegetation biomass indicator, was combined with a single-date classification of Landsat Thematic Mapper (TM) to map the association between forest type and hurricane effects. Hurricane effects to the forested wetland included an abrupt decrease and subsequent increase in biomass. The...
Authors
Elijah Ramsey III, D.K. Chappell, Dennis M. Jacobs, Sijan Sapkota, D.G. Baldwin
Shot prevalences and diets of diving ducks five years after ban on use of lead shotshells at Catahoula Lake, Louisiana Shot prevalences and diets of diving ducks five years after ban on use of lead shotshells at Catahoula Lake, Louisiana
Catahoula Lake, central Louisiana, is a RAMSAR Convention Wetland of International Importance and among the most important wintering and staging areas for waterfowl in North America. To evaluate exposure rates in Catahoula Lake waterfowl 5 years after a ban on use of lead shot, we determined the prevalence of ingested shot and diets of canvasbacks (Aythya valisineria) and lesser scaup (A...
Authors
Joseph L. Moore, William L. Hohman, Timothy M. Stark, Gary A. Weisbrich
Coastal Louisiana Coastal Louisiana
No abstract available
Authors
James G. Gosselink, J. Coleman, Robert E. Stewart
Natural establishment of woody species on abandoned agricultural fields in the lower Mississippi Valley: first- and second-year results Natural establishment of woody species on abandoned agricultural fields in the lower Mississippi Valley: first- and second-year results
The natural establishment of woody seedlings on abandoned agricultural fields was investigated at sites in Louisiana and Mississippi. Series of disked and undisked plots originating at forest edges and oriented in cardinal directions were established on fields at each site. During the firest 2 years, seedling recruitment was dominated by sweetgum, sugarberry, and elms at both sites...
Authors
J. A. Allen, J.W. McCoy, B. D. Keeland
Effects of flooding regime, mycorrhizal inoculation and seedling treatment type on first-year survival of Nuttal Oak (Quercus nuttallii Palmer) Effects of flooding regime, mycorrhizal inoculation and seedling treatment type on first-year survival of Nuttal Oak (Quercus nuttallii Palmer)
Three different types of Nuttall oak (Quercus nuttallii Palmer) seedlings were planted on floodprone, former cropland in Mississippi, Louisiana, and Texas. The three types of 1+0 seedlings planted at each site in January and February of 1995 were bareroot seedlings, seedlings grown in 164 square centimeters plastic containers, and container grown seedlings inoculated with vegetative...
Authors
Virginia Burkett, Hans Williams
Characterization of an old-growth bottomland hardwood wetland forest in Northeast Texas: Harrison Bayou Characterization of an old-growth bottomland hardwood wetland forest in Northeast Texas: Harrison Bayou
Most wetland losses in the southern region over the past 200 years have occurred in bottomland hardwood forests. By 1980 the original extent of palustrine bottomland in Texas had been reduced by 63%, from roughly 16 to 6 million acres. Additional losses have occurred during more recent years as a result of conversion to agriculture and timber harvests; these factors and the need to...
Authors
Laurence C. Walker, Thomas Brantley, Virginia Burkett
Nonindigenous species: methods of introduction and impacts Nonindigenous species: methods of introduction and impacts
No abstract available.
Authors
Pamela L. Fuller
NIEHS sponsors workshop on amphibian deformities NIEHS sponsors workshop on amphibian deformities
No abstract available.
Authors
C. Kenneth Dodd
Perspectives on the land use history of North America: A context for understanding our changing environment Perspectives on the land use history of North America: A context for understanding our changing environment
Ecological change is constant and profound, yet it often occurs at temporal and spatial scales that are difficult to measure and interpret. This publication demonstrates how diverse data bases, archived in different formats and at numerous locations, can be brought together to provide an integrated perspective on the relationship between land use and landcover change. The authors provide...
Comparative sensitivity of five species of macrophytes and six species of algae to atrazine, metribuzin, alachlor, and metolachlor Comparative sensitivity of five species of macrophytes and six species of algae to atrazine, metribuzin, alachlor, and metolachlor
This study determined the relative sensitivity of five species of aquatic macrophytes and six species of algae to four commonly used herbicides (atrazine, metribuzin, alachlor, and metolachlor). Toxicity tests consisted of 96-h (duckweed and algae) or 14-d (submerged macrophytes) static exposures. The triazine herbicides (atrazine and metribuzin) were significantly more toxic to aquatic...
Authors
James F. Fairchild, Shane Ruessler, A. Ron Carlson