Author: Water and Air Research, IncPublisher:
ISBN:
Category : Aquatic invertebrates
Languages : en
Pages :
Book Description
Benthic Macroinvertebrate Data from 148 Surface Water Sites Within the St. Johns River Water Management District
Author: Water and Air Research, IncPublisher:
ISBN:
Category : Aquatic invertebrates
Languages : en
Pages :
Book Description
Benthic Macroinvertebrate Data from 20 Surface Water Sites Within the Lower St. Johns River Basin
Author: David L. EvansPublisher:
ISBN:
Category : Aquatic invertebrates
Languages : en
Pages : 12
Book Description
Reports on data collected by District staff between March and August 2000 and analyzed by Water & Air Research, Inc. with data summarized using average organism density, total number of taxa observed, percent dominance of pollution-tolerant taxa, and polled Shannon-Weiner species diversity index for each sampling site.
An Evaluation of Benthic Macroinvertebrate Data from 20 Surface Water Sites Within the Lower St. Johns River Basin, 2002-2003
Author: Relations of Benthic Macroinvertebrates to Concentrations of Trace Elements in Water, Streambed Sediments, and Transplanted Bryophytes and Stream Habitat Conditions in Nonmining and Mining Areas of the Upper Colorado River Basin, Colorado, 1995-98
Author: Scott V. MizePublisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 70
Book Description
Methods for Collecting Benthic Invertebrate Samples as Part of the National Water-Quality Assessment Program
Author: Thomas F. CuffneyPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 168
Book Description
Reconnaissance of Benthic Invertebrates from Tributary Streams of the Yampa and North Platte River Basins, Northwestern Colorado
Author: Linda J. BrittonPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 82
Book Description
Analysis of Variability in New York State Benthic Macroinvertebrate Samples
Author: Alexander Johnston SmithPublisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 56
Book Description
Benthic Macroinvertebrates as Indexes of Water Quality in the Scioto River Basin, Ohio
Author: John H. OlivePublisher: Scholastic
ISBN:
Category : Science
Languages : en
Pages : 148
Book Description
Benthic Macroinvertebrate Subsampling Effort and Taxonomic Resolution for Bioassessments of Streams in the James River Watershed of Virginia
Author: Laurel Cary WilliamsPublisher:
ISBN:
Category :
Languages : en
Pages : 124
Book Description
Benthic macroinvertebrate diversity influences stream food web dynamics, nutrient cycling and material exchange between the benthos and the water column. Stream bioassessment has moved to the forefront of water quality monitoring in terms of benthic macroinvertebrate diversity in the recent past. The objectives of this study were to determine optimum subsample size and level of taxonomic resolution necessary to accurately and precisely describe macroinvertebrate diversity in streams flowing in the Piedmont province of the James River watershed in Virginia. Forty-nine sampling sites were selected from streams within the Piedmont Physiographic Province of the James River watershed. Ten sites were randomly selected to have all macroinvertebrates in the sample identified to the genus level whenever possible. Optimum subsampling intensities and Virginia Stream Condition Index (VSCI) metrics and scores were determined. For samples with the total number of individuals at less than 500, the genus level of taxonomy provided lower overall optimum subsampling intensities. However, for samples with total individuals over 1000, optimum subsampling intensities at the genus level of taxonomy were higher than the family level for more than 50% of the metrics. For both family and genus levels of taxonomy, the majority of optimum subsampling intensities were well over 50% of the total individuals in the sample, with some as high as 100% of the individuals. While optimum subsampling intensities were valuable in comparing family and genus level taxonomy, they are not reasonable for stream bioassessment protocols; the cost:benefit ratio would be highly unbalanced. A minimum subsample size of 200 individuals is optimum for determining VSCI scores, while optimum taxonomic resolution is dependent on several factors. Thus, the level of taxonomic resolution for a particular study should be determined by the study objectives, level of site impairment and sample size.
Benthic Macroinvertebrate Community Structure in Relation to Water Quality and Habitat in the Upper Pecos River, Texas
Author: Greg L. LarsonPublisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 44
Book Description