Results 161 to 170 of about 2,576 (201)

Acute bioassays with benthic macroinvertebrates conducted in situ

Bulletin of Environmental Contamination and Toxicology, 1989
Several methods of toxicity testing using macroinvertebrates in controlled laboratory experiments have been reported. Researchers conducted bioassays with natural assemblages of benthic macroinvertebrates exposed to several petroleum refinery effluents. They found that the populations of invertebrates declined after only a few days of exposure.
M, Whaley, R, Garcia, J, Sy
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Effects of Iron on Benthic Macroinvertebrate Communities in the Field

Bulletin of Environmental Contamination and Toxicology, 2011
Matched chemical and ecological monitoring data were used to assess the effects of iron on benthic macroinvertebrate communities. Three measures of iron exposure: dissolved, total, and particulate iron were assessed. Ecological responses were normalised to an unimpacted reference condition to make site-specific predictions of the reference condition ...
Adam, Peters, Mark, Crane, William, Adams   +2 more
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Effects of hydro- and thermopeaking on benthic macroinvertebrate drift

Science of The Total Environment, 2016
The operation of storage hydropower plants is commonly linked to frequent fluctuations in discharge and water level (hydropeaking) of downstream river stretches and is often accompanied by cooling or warming of the water body downstream (cold or warm thermopeaking, respectively).
Schülting, Lisa, Feld, Christian K., Graf, Wolfram   +2 more
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Overwintering of Freshwater Benthic Macroinvertebrates

1991
Although temperature has long been recognized as a key variable in aquatic ecosystems, the consequences of freezing have received relatively little attention. At high elevations and latitudes, ice formation is a major variable affecting differential survival of organisms and hence the abundance and community composition of freshwater organisms. Ice may
Mark W. Oswood, L. Keith Miller, John G. Irons   +2 more
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A Method for Tagging Individual Benthic Macroinvertebrates

Journal of the North American Benthological Society, 1989
An inexpensive and reliable method for marking individual benthic macroinvertebrates was developed using hand-crafted 2 × 3-mm plastic tags attached with readily available cyanoacrylate instant glue. Pteronarcys stoneflies retained tags for 6 mo in a circular laboratory stream tank, and up to 81 d under field conditions in a turbulent Rocky Mountain ...
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Responses of stream benthic macroinvertebrates to fire

Forest Ecology and Management, 2003
Synthesis of published research on the responses of stream benthic macroinvertebrates to fire in western United States indicates a consistent pattern of response that can guide resource management and future research. Direct effects of fire generally are minor or indiscernible.
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Bioassays with a Natural Assemblage of Benthic Macroinvertebrates

1977
A new bioassay method for determining the effects of environmental contaminants on populations of benthic macroinvertebrates is described. Colonized Hester-Dendy samplers were transported from a natural stream to artificial streams and exposed to industrial wastewater.
SL Burks, JL Wilhm
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The benthic macroinvertebrate communities of the Thames estuary

1998
Over the past 20 years, the reports documenting the clean-up and recovery of the Thames estuary have concentrated largely on the return of the fish to the system, given their high public profile (Huddart and Arthur, 1971a,b; Doxat, 1977; Wheeler, 1979; Andrews, 1984).
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The benthic macroinvertebrates of the Block Island Sound

Estuarine, Coastal and Shelf Science, 1982
Abstract The benthic invertebrates of Block Island Sound have not been adequately studied, in contrast to other adjacent southern New England sounds. This study examines the species composition, abundance and biomass of benthic macrofaunal invertebrates at nine locations within Block Island Sound. The sites sampled, represent a wide range of subtidal
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BENTHIC MACROINVERTEBRATES

1992
  +4 more sources