A benthic index of environmental condition of Gulf of Mexico estuaries

An index was developed for estuarine macrobenthos in the Gulf of Mexico that discriminated between areas with degraded environmental conditions and areas with undegraded or reference conditions. Test sites were identified as degraded or reference based on criteria for dissolved oxygen levels, sediment toxicity tests, and sediment contamination. Discriminant analysis was used to identify a suite of measures of benthic community composition and diversity that would most successfully distinguish degraded from undegraded sites. The resultant benthic index was composed of a linear combination of three factors: the Shannon-Wiener diversity index, the proportion of total benthic abundance as tubificid oligochaetes, and the proportion of total benthic abundance as bivalve molluscs. This index was used to evaluate the spatial patterns of degraded benthic resources in the Gulf of Mexico.

[1]  Byron K. Williams,et al.  Some Observations of the Use of Discriminant Analysis in Ecology , 1983 .

[2]  John C. Young,et al.  Effects of contaminants of macrobenthic communities in the upper Calcasieu Estuary, Louisiana , 1992, Bulletin of environmental contamination and toxicology.

[3]  D. McLusky,et al.  Effect of temperature and salinity on the toxicity of chromium to three estuarine invertebrates (Corophium volutator, Macoma balthica, Nereis diversicolor) , 1984 .

[4]  D. Reish.  Benthic Invertebrates as Indicators of Marine Pollution: 35 Years of Study , 1986, OCEANS '86.

[5]  James R. Karr,et al.  Ecological perspective on water quality goals , 1981 .

[6]  D. McLusky,et al.  The effects of temperature and salinity on the toxicity of heavy metals to marine and estuarine invertebrates , 1986 .

[7]  A. Holland,et al.  Long-term variation in mesohaline Chesapeake Bay macrobenthos: Spatial and temporal patterns , 1987 .

[8]  R. Rosenberg.  Benthic macrofaunal dynamics, production, and dispersion in an oxygen-deficient estuary of west Sweden , 1977 .

[9]  J. S. Holland,et al.  Galveston Bay Benthic Community Structure As An Indicator of Water-Quality , 1973 .

[10]  R. Rosenberg,et al.  Macrobenthic succession in relation to organic enrichment and pollution of the marine environment , 1978 .

[11]  P. Chapman.  Current approaches to developing sediment quality criteria , 1989 .

[12]  T. Simons,et al.  Macroinvertebrate associations from beaches of selected barrier islands in the northern Gulf of Mexico : important environmental relationships , 1991 .

[13]  Gary M. Smillie,et al.  A sensitivity analysis of nine diversity and seven similarity indices , 1990 .

[14]  R. Kalke,et al.  Niche characterization of dominant estuarine benthic species , 1986 .

[15]  James R. Karr,et al.  Regional Applications of an Index of Biotic Integrity for Use in Water Resource Management , 1988 .

[16]  D. McLusky,et al.  Effect of temperature and salinity on the toxicity of nickel and zinc to two estuarine invertebrates (Corophium volutator, Macoma balthica) , 1985 .

[17]  J. Summers,et al.  Evaluation of sampling strategies to characterize dissolved oxygen conditions in northern Gulf of Mexico estuaries , 1993, Environmental monitoring and assessment.

[18]  T. Soniat,et al.  Effects of Saltwater Intrusion from the Inner Harbor Navigation Canal on the Benthos of Lake Pontchartrain, Louisiana , 1983 .

[19]  P. Chapman,et al.  Evaluation of effects associated with an oil platform, using the sediment quality triad , 1991 .

[20]  R. Warwick,et al.  Detection of pollution effects on marine macrobenthos: further evaluation of the species abundance/biomass method , 1987 .

[21]  D. Harper,et al.  The occurrence of hypoxic bottom water off the upper Texas coast and its effects on the benthic biota. , 1981 .

[22]  G. Gaston,et al.  Trophic structure of macrobenthic communities in the Calcasieu estuary, Louisiana , 1988 .

[23]  H. Washington,et al.  Diversity, biotic and similarity indices: A review with special relevance to aquatic ecosystems , 1984 .

[24]  D. Boesch,et al.  Effects of hypoxia on continental shelf benthos: comparisons between the New York Bight and the Northern Gulf of Mexico , 1991, Geological Society, London, Special Publications.

[25]  W. Scott Overton,et al.  An EPA program for monitoring ecological status and trends , 1991, Environmental monitoring and assessment.

[26]  R. Warwick.  The level of taxonomic discrimination required to detect pollution effects on marine benthic communities , 1988 .

[27]  D. Pauly,et al.  Measuring ecological stress: Variations on a theme by R.M. Warwick , 1990 .

[28]  G. Gaston,et al.  Estuarine macrobenthos in Calcasieu Lake, Louisiana: Community and trophic structure , 1988 .

[29]  G. Gaston.  Effects of hypoxia on macrobenthos of the inner shelf off Cameron, Louisiana , 1985 .

[30]  G. Bilyard.  The value of benthic infauna in marine pollution monitoring studies , 1987 .

[31]  R. Warwick.  A new method for detecting pollution effects on marine macrobenthic communities , 1986 .

[32]  L. G. Morgan,et al.  The Potential for Biological Effects of Sediments-Sorbed Contaminants Tested in the National Status and Trends Program , 1990 .

[33]  Hiroaki Tsutsumi,et al.  Benthic faunal succession in a cove organically polluted by fish farming , 1991 .

[34]  B. Rygg.  Heavy-metal pollution and log-normal distribution of individuals among species in benthic communities , 1986 .

[35]  R. Grizzle.  Pollution indicator species of macrobenthos in a coastal lagoon , 1984 .