Breakpoint Analysis and Assessment of Selected Stressor Variables on Benthic Macroinvertebrate and Fish Communities in Indiana Streams PDF Download
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Author: Brian J. Caskey
Publisher: Geological Survey (USGS)
ISBN: 9781411327863
Category : Benthos
Languages : en
Pages : 35
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Book Description
Author: Brian J. Caskey
Publisher: Geological Survey (USGS)
ISBN: 9781411327863
Category : Benthos
Languages : en
Pages : 35
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Book Description
Author: U. S. Department U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781497580541
Category :
Languages : en
Pages : 42
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Book Description
Water chemistry, periphyton and seston chlorophyll a (CHLa), and biological community data were collected from 321 sites from 2001 through 2005 to (1) determine statistically and ecologically significant relations among the stressor (total nitrogen, total phosphorus, periphyton and seston CHLa, and turbidity) variables and response (biological community) variables; and, (2) determine the breakpoint of biological community attributes and metrics in response to changes in stressor variables.
Author: U.S. Department of the Interior
Publisher: CreateSpace
ISBN: 9781499529999
Category : Reference
Languages : en
Pages : 40
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Book Description
To assist Kentucky in refining numeric nutrient criteria in the Pennyroyal Bioregion, the U.S. Geological Survey and the Kentucky Division of Water collected and analyzed water chemistry, turbidity, and biological-community data from 22 streams throughout the Crawford-Mammoth Cave Upland ecoregion (U.S. Environmental Protection Agency Level IV Ecoregion, 71a) within the Pennyroyal Bioregion from September 2007 to May 2008. Statistically significant and ecologically relevant relations among the stressor (total phosphorus, total nitrogen, and turbidity) variables and response (macroinvertebrate-community attributes) variables and the breakpoint values of biological-community attributes and metrics in response to changes in stressor variables were determined.
Author: Angela S. Crain
Publisher:
ISBN:
Category : Nutrient pollution of water
Languages : en
Pages : 29
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Book Description
Author:
Publisher:
ISBN:
Category : Water quality bioassay
Languages : en
Pages : 192
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Book Description
Author:
Publisher:
ISBN: 9781411335394
Category : Aquatic ecology
Languages : en
Pages : 0
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Book Description
Author: Brian J. Caskey
Publisher:
ISBN: 9781411335394
Category : Aquatic ecology
Languages : en
Pages : 28
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Book Description
Author: Thomas P. Simon
Publisher: CRC Press
ISBN: 1420041452
Category : Nature
Languages : en
Pages : 597
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Book Description
The use of environmental assessment procedures within monitoring frameworks demands that there be some relevancy to the decisions that management agencies make using biological criteria. These biological criteria standards are the basis for environmental indicators, which provide a direct measure of environmental quality. Biological Response Signat
Author:
Publisher:
ISBN:
Category : Nutrient pollution of water
Languages : en
Pages : 28
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Book Description
Author: Katherine Page Shurgar
Publisher:
ISBN: 9781109800975
Category : Invertebrates
Languages : en
Pages : 116
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Book Description
In 2004 the USEPA conducted the National Wadeable Stream Assessment (WSA) in order to measure and report the state of rivers and streams in the U.S. (USEPA, 2004). A total of 500 sites were surveyed for the nationwide study. Results from the study were aggregated into nine reporting ecoregions in order to provide statistical robustness in comparing sample sites with reference conditions. In the Interior Highlands of Arkansas, Missouri, and Oklahoma, 32 sites were sampled for the WSA project. The purpose of our study was to investigate the utility of this limited data set in determining stressor-response relations in an ecoregion smaller than one of the nine regions designed by the USEPA. A hierarchical approach using multivariate, step-wise, and correlation analyses was developed in order to examine the scalar relations of catchment and reach scale influences on stream conditions, and to evaluate macroinvertebrate assemblages for detection of impact. The strongest model relations (P=0.0001) were the combined effect of land cover, riparian conditions, and geomorphology on percent Wood (R2=0.76), Mean Substrate Diameter (R 2=0.72) and percent Coarse Gravel (R2=0.71). Model predictions of land cover impacts were found to significantly (P
