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Filter Total Items: 3374

Genetic diversity in a morphologically conservative invasive taxon: Multiple introductions of swamp eels to the southeastern United States

Genetic analysis of introduced populations, especially in morphologically conservative taxa, can clarify introduction histories, identify management units and source populations, provide a more realistic estimate of the frequency of successful invasion, and suggest strategies for preventing further introductions. In the last 7 years, populations of swamp eels, referred to the Asian genus Monopteru
Authors
T.M. Collins, J.C. Trexler, L.G. Nico, T.A. Rawlings

Responses of coastal wetlands to rising sea level

Salt marsh ecosystems are maintained by the dominant macrophytes that regulate the elevation of their habitat within a narrow portion of the intertidal zone by accumulating organic matter and trapping inorganic sediment. The long-term stability of these ecosystems is explained by interactions among sea level, land elevation, primary production, and sediment accretion that regulate the elevation of
Authors
J. T. Morris, P.V. Sundareshwar, C.T. Nietch, B. Kjerfve, Donald R. Cahoon

Weak trophic interactions among birds, insects and white oak saplings (Quercus alba)

We examined the interactions among insectivorous birds, arthropods and white oak saplings (Quercus alba L.) in a temperate deciduous forest under 'open' and 'closed' canopy environments. For 2 y, we compared arthropod densities, leaf damage and sapling growth. Saplings from each canopy environment were assigned to one of four treatments: (1) reference, (2) bird exclosure, (3) insecticide and (4) e
Authors
J.S. Lichtenberg, D.A. Lichtenberg

Patterns and processes of wetland loss in coastal Louisiana are complex: A reply to Turner 2001. Estimating the indirect effects of hydrologic change on wetland loss: If the Earth is curved, then how would we know it?

The coastal wetlands of Louisiana comprise a vast expanse of marine to freshwater wetland plant communities interspersed w-ith shallow bays and bayous. These wetlands were built by processes associated with the present-day Mississippi and Atchatfalaya River deltas and older distributaries occupied by the river over the past 7,000 }rears. The high rates of wetland loss identified in this system dur
Authors
John W. Day, Gary P. Shaffer, Denise J. Reed, Donald R. Cahoon, Louis D. Britsch, Suzanne Hawes

Canopy disturbance patterns in a bottomland hardwood forest in northeast Arkansas, USA

We characterized canopy disturbance patterns in a bottomland hardwood forest and identified linkages to tree species characteristics and interannual flooding patterns. We located 116 newly formed canopy gaps created by 136 gapmakers of 13 species. Over 83% of the gapmakers were snapped or uprooted (i.e., windthrow). The probability of any given gapmaker snapping or uprooting differed among years,
Authors
Sammy L. King, T. J. Antrobus

Prairie Cajuns and the Cajun Prairie: A history

No abstract available.
Authors
Malcolm Vidrine, William R. Pontenot, Charles Allen, Bruno Borsari, Larry K. Allain

Potential consequences of climate variability and change on coastal areas and marine resources

No abstract available.
Authors
John C. Field, Donald F. Boesch, Donald Scavia, Robert Buddemeier, Virginia Burkett, Daniel Cayan, Michael Fogarty, Mark Harwell, Robert Howarth, Curt Mason, L.J. Pietrafesa, Denise Reed, Thomas Royer, Asbury Sallenger, Michael Spranger, James G. Titus

Lepidopteran and odonate communities in the Cajun Prairie ecosystem in southwestern Louisiana

No abstract available.
Authors
Malcolm Vidrine, Charles Allen, Bruno Borsari, Larry K. Allain

Potential consequences of climate variability and change for the Southeastern United States

No abstract available.
Authors
Virginia Burkett, Ronald Ritschard, Steven McNulty, J. J. O'Brien, Robert C. Abt, James Jones, Upton Hatch, Brian Murray, Shrikant Jagtap, Jim Cruise

Recent colonization of mangroves and nesting frigatebirds at Dry Tortugas

No abstract available.
Authors
Thomas Doyle, Thomas C. Michot, Richard H. Day, Christopher J. Wells