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An examination of organic/carbonate-bound metals in bottom sediments of Bayou Trepagnier, Louisiana An examination of organic/carbonate-bound metals in bottom sediments of Bayou Trepagnier, Louisiana

To assess potential impact of metals on the biosphere in bottom sediments, forms were determined for selected metals in a southeastern Louisiana bayou, Bayou (B.) Trepagnier, which has been impacted by industrial activity at its head by a manufacturing complex (MC). Ten pairs of cores along the length of the bayou allowed variation with distance to be studied. Sequential extractions...
Authors
Timothy J. Dore, Alan M. Bailey, John W. McCoy, Glenn W. Johnson

Initial comparison of bird communities of three southern forested wetlands Initial comparison of bird communities of three southern forested wetlands

No abstract available.
Authors
P.B. Hamel, Wylie C. Barrow, Richard A. Fischer, Michael P. Guilfoyle, Terry J. Spengler, James S. Wakely

Plant succession and greentree reservoir management: Implications for management and restoration of bottomland hardwood wetlands Plant succession and greentree reservoir management: Implications for management and restoration of bottomland hardwood wetlands

Bottomland hardwood forests are distributed along rivers and streams throughout the central and eastern United States, with the greatest concentration in the Southeast. Past and projected losses of bottomland hardwoods and degradation of remaining stands suggest that habitat management and/or restoration strategies that target multiple species and multiple uses will be necessary to...
Authors
Sammy L. King, James A. Allen

Normalization of metal concentrations in estuarine sediments from the Gulf of Mexico Normalization of metal concentrations in estuarine sediments from the Gulf of Mexico

Metal concentrations were examined in sediments from 497 sites within the estuaries of the Gulf of Mexico by the United States Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP). Data were normalized for extant concentrations of aluminum to isolate natural factors from anthropogenic ones. The normalization was based on the hypothesis that metal...
Authors
J.Kevin Summers, Terry L. Wade, Virginia D. Engle, Ziad A. Malaeb

Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration Effects of nutrients and hydroperiod on Typha, Cladium, and Eleocharis: Implications for everglades restoration

The recent expansion of Typha domingensis (Typha) into areas of the Everglades previously dominated by Cladium jamaicense (Cladium) communities has led to competing hypotheses about the importance of nutrient concentration vs. hydroperiod in controlling the distribution of these species. In this study, experimental mixtures of Typha domingensis, Cladium jamaicense, and Eleocharis...
Authors
S. Newman, James B. Grace, J. W. Koebel

Seagrass responses to long-term light reduction by brown tide in upper Laguna Madre, Texas: Distribution and biomass patterns Seagrass responses to long-term light reduction by brown tide in upper Laguna Madre, Texas: Distribution and biomass patterns

A brown tide caused by a very dense bloom of an as yet undescribed species of the new class Pelagophyceae was first reported in upper Laguna Madre, Texas, USA, in June 1990 and has been there continuously through December 1995. No change in response to reduced light was evident in the distribution of the seagrass Halodulewrightii along transects sampled before the brown tide in 1988 and...
Authors
Christopher P. Onuf

A metabolism-based trophic index for comparing the ecological values of shallow-water sediment habitats A metabolism-based trophic index for comparing the ecological values of shallow-water sediment habitats

We determined fluxes of oxygen and nutrients between water and sediments at 21 sites primarily in Virginia and North Carolina estuaries, over the past 15 yr. These sites represented broad ranges in salinity, tidal amplitude, hydrology, nutrient availability, turbidity, light availability, depth, sediment grain size, and anthropogenic disturbance. In general, we found that...
Authors
W.M. Rizzo, S. K. Dailey, G. J. Lackey, R.R. Christian, B. E. Berry, R. L. Wetzel
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