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Filter Total Items: 3509

The effect of community composition on persistence of prey with their predators in an assemblage of pond-breeding amphibians The effect of community composition on persistence of prey with their predators in an assemblage of pond-breeding amphibians

We examined whether the species composition of a community influences the persistence of larval Ambystoma maculatum in assemblages composed of two larger intraguild predators (A. opacum and A. jeffersonianum) and an alternative prey species (tadpoles of Rana sylvatica). We predicted a priori that A. maculatum would have higher survival in more diverse communities containing alternative...
Authors
S.C. Walls, M.C. Williams

Abstracts from "Coastal Marsh Dieback in the Northern Gulf of Mexico: Extent, Causes, Consequences, and Remedies Abstracts from "Coastal Marsh Dieback in the Northern Gulf of Mexico: Extent, Causes, Consequences, and Remedies

In the spring of 2000, scientists discovered a new and unprecedented loss of salt marsh vegetation in coastal Louisiana and other areas along the northern coast of the Gulf of Mexico. This dieback of salt marsh vegetation, sometimes called the brown marsh phenomenon', primarily involved the rapid browning and dieback of smooth cordgrass (Spanina alterniflora). Coastal Louisiana has...
Authors
C. Edward Proffitt, Tammy Michelle Charron

Manatees in the Gulf of Mexico Manatees in the Gulf of Mexico

The endangered Florida manatee (Trichechus manatus latirostris) inhabits rivers and estuaries along both coasts of Florida and, to a lesser extent, adjacent states (Figure 1). Since 1990, documented sightings of manatees outside of Florida have been increasing. This increase in sightings probably represents northward shifts in manatee distribution made possible by man-made sources of...
Authors
Robert K. Bonde, Lynn W. Lefebvre

Pattern and process of land loss in the Mississippi Delta: A spatial and temporal analysis of wetland habitat change 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...
Authors
John W. Day, Louis D. Britsch, Suzanne Hawes, Gary P. Shaffer, Denise J. Reed, Donald R. Cahoon

Fire in eastern ecosystems Fire in eastern ecosystems

Prior to Euro-American settlement, fire was a ubiquitous force across most of the Eastern United States. Fire regimes spanned a time-scale from chronic to centuries. Fire severity varied from benign to extreme (fig. 1-2). Today, fire is still a major force on the landscape. In some ecosystems fire stabilizes succession at a particular sere, while in others, succession is set back to...
Authors
Dale D. Wade, Brent L. Brock, Patrick H. Brose, James B. Grace, G. A. Hoch, William A. Patterson III

Disruption and restoration of en route habitat, a case study: The Chenier Plain Disruption and restoration of en route habitat, a case study: The Chenier Plain

Cheniers (relict beach ridges) and other habitats adjacent to ecological barriers may be critical linkages in the migratory pathways of long-distance migratory birds. It is important that these wooded habitats provide enough food and cover at the right time to support these birds’ requirements. To date, little attention has been given to the conservation of coastal woodlands, habitats in...
Authors
Wylie C. Barrow, Chao-Chieh Chen, Robert B. Hamilton, Keith Ouchley, Terry J. Spengler

Louisiana gap analysis project Louisiana gap analysis project

No abstract available.
Authors
James Johnston, Steven Hartley
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