Author: Christopher Kevin Metcalf
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 170
Book Description
Evaluating Mountain Headwater Fish Communities with an Index of Biotic Integrity
Author: Christopher Kevin Metcalf
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 170
Book Description
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 170
Book Description
Use of the Index of Biotic Integrity to Evaluate the Effects of Habitat, Flow, and Water Quality on Fish Communities in Three Colorado Front Range Rivers
Author: Kurt D. Fausch
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 53
Book Description
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 53
Book Description
Use of the Index of Biotic Integrity to Evaluate Fish Communities in Western Great Plains Streams
Author: Lynn H. Schrader
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 240
Book Description
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 240
Book Description
Using the Index of Biotic Integrity of Fish Communities to Evaluate Habitat Quality in Middle Chattahoochee River Tributaries
Author: Theodor W. Roever
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 148
Book Description
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 148
Book Description
Assessing the Sustainability and Biological Integrity of Water Resources Using Fish Communities
Author: Thomas P. Simon
Publisher: CRC Press
ISBN: 1000141381
Category : Science
Languages : en
Pages : 700
Book Description
This book examines the application of fish community characteristics to evaluate the sustainability and biological integrity of freshwaters. Topics include perspectives on use of fish communities as environmental indicators in program development, collaboration, and partnership forming; influence of specific taxa on assessment of the IBI; regional applications for areas where the IBI had not previously been developed; and specific applications of the IBI developed for coldwater streams, inland lakes, Great Lakes, reservoirs, and tailwaters.
Publisher: CRC Press
ISBN: 1000141381
Category : Science
Languages : en
Pages : 700
Book Description
This book examines the application of fish community characteristics to evaluate the sustainability and biological integrity of freshwaters. Topics include perspectives on use of fish communities as environmental indicators in program development, collaboration, and partnership forming; influence of specific taxa on assessment of the IBI; regional applications for areas where the IBI had not previously been developed; and specific applications of the IBI developed for coldwater streams, inland lakes, Great Lakes, reservoirs, and tailwaters.
Fish Community Structure and Water Quality Assessment (Index of Biotic Integrity) of the San Marcos River, Texas
Author: Travis Kelsey
Publisher:
ISBN:
Category : Ecological integrity
Languages : en
Pages : 192
Book Description
Publisher:
ISBN:
Category : Ecological integrity
Languages : en
Pages : 192
Book Description
Development of a Fish Index of Biotic Integrity to Assess the Condition of West Virginia Streams
Author: David M. Walters
Publisher:
ISBN:
Category : Environmental monitoring
Languages : en
Pages : 45
Book Description
Publisher:
ISBN:
Category : Environmental monitoring
Languages : en
Pages : 45
Book Description
Landscape and Local Influences on the Biotic Integrity of Fish Communities in Ohio Headwater Streams
Author: Donna S. McCollum
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 162
Book Description
Stream ecosystems are holistic systems that incorporate disturbances and abiotic influences at many spatial and temporal scales. This view supports a three-tiered model of variables that determine biotic integrity in streams, with causes and effects flowing from large-scale to fine-scale processes. Tier One characteristics include variables important at the scale of geomorphological processes and land use over entire watersheds. These variables largely determine Tier Two factors, abiotic conditions in a stream reach. Tier Two variables, in turn, largely structure the Tier Three variables, the stream's biotic communities. Through field studies and GIS analysis, relationships among these three tiers of variables were examined in this research to explore the question of how agriculture exerts its influence on stream fishes. This study investigated 27 streams, in two ecoregions and the transition area, or ecotone, between them, in south-central Ohio. The study design allowed questions to be asked concerning the relative influence of geomorphology and land use in varied landscapes, as well as relative impacts of watershed versus riparian land use. The region also contained relatively equal proportions of three types of agriculture (hay, row crops, and pasture) allowing the study to address the question of which land use might be most harmful to stream fish. This study supported the importance of row crop agriculture, finding it to be the most degrading type of agriculture for stream fish, but also found pasture to be an important causal factor in stream community degradation. This study also supported the importance of riparian buffers, finding riparian agriculture to be more degrading than agriculture over the entire watershed. A more interesting finding is the suggestion that a minor amount of nutrient enrichment from agricultural land use may benefit streams that are naturally oligotrophic. A possible mechanism could be increased primary production, which increases macroinvertebrate density, and provides a larger food base for fishes. This study also reports the possible existence of a biodiversity "hotspot" in the transitional region between the two ecoregions. Some evidence exists that greater habitat heterogeneity increases species richness, suggesting a possible cause for higher biodiversity in this ecotonal region. Since habitat heterogeneity over whole streams was not measured in this study, both the existence and mechanism of such a hotspot needs more study. A final conclusion is that geomorphology and agricultural land use may be equally important in structuring stream conditions, and thus, biological stream communities. This study illustrates the difficulties associated with overlapping causes and effects in complex systems such as streams and their catchments. Several variables in the study reported here required examination at multiple scales and with multiple statistical techniques in order to understand relationships that varied across different regions. The effects of a particular agricultural variable were not always equal in the diverse landscapes of southern Ohio. Lotic ecologists must examine a variety of ecoregions, and incorporate a variety of scales with a variety of analytic tools, if predictive stream ecology is to become a reality.
Publisher:
ISBN:
Category : Biotic communities
Languages : en
Pages : 162
Book Description
Stream ecosystems are holistic systems that incorporate disturbances and abiotic influences at many spatial and temporal scales. This view supports a three-tiered model of variables that determine biotic integrity in streams, with causes and effects flowing from large-scale to fine-scale processes. Tier One characteristics include variables important at the scale of geomorphological processes and land use over entire watersheds. These variables largely determine Tier Two factors, abiotic conditions in a stream reach. Tier Two variables, in turn, largely structure the Tier Three variables, the stream's biotic communities. Through field studies and GIS analysis, relationships among these three tiers of variables were examined in this research to explore the question of how agriculture exerts its influence on stream fishes. This study investigated 27 streams, in two ecoregions and the transition area, or ecotone, between them, in south-central Ohio. The study design allowed questions to be asked concerning the relative influence of geomorphology and land use in varied landscapes, as well as relative impacts of watershed versus riparian land use. The region also contained relatively equal proportions of three types of agriculture (hay, row crops, and pasture) allowing the study to address the question of which land use might be most harmful to stream fish. This study supported the importance of row crop agriculture, finding it to be the most degrading type of agriculture for stream fish, but also found pasture to be an important causal factor in stream community degradation. This study also supported the importance of riparian buffers, finding riparian agriculture to be more degrading than agriculture over the entire watershed. A more interesting finding is the suggestion that a minor amount of nutrient enrichment from agricultural land use may benefit streams that are naturally oligotrophic. A possible mechanism could be increased primary production, which increases macroinvertebrate density, and provides a larger food base for fishes. This study also reports the possible existence of a biodiversity "hotspot" in the transitional region between the two ecoregions. Some evidence exists that greater habitat heterogeneity increases species richness, suggesting a possible cause for higher biodiversity in this ecotonal region. Since habitat heterogeneity over whole streams was not measured in this study, both the existence and mechanism of such a hotspot needs more study. A final conclusion is that geomorphology and agricultural land use may be equally important in structuring stream conditions, and thus, biological stream communities. This study illustrates the difficulties associated with overlapping causes and effects in complex systems such as streams and their catchments. Several variables in the study reported here required examination at multiple scales and with multiple statistical techniques in order to understand relationships that varied across different regions. The effects of a particular agricultural variable were not always equal in the diverse landscapes of southern Ohio. Lotic ecologists must examine a variety of ecoregions, and incorporate a variety of scales with a variety of analytic tools, if predictive stream ecology is to become a reality.
Assessing the Sustainability and Biological Integrity of Water Resources Using Fish Communities
Author: Thomas P. Simon
Publisher: CRC Press
ISBN: 1000102882
Category : Science
Languages : en
Pages : 692
Book Description
This book examines the application of fish community characteristics to evaluate the sustainability and biological integrity of freshwaters. Topics include perspectives on use of fish communities as environmental indicators in program development, collaboration, and partnership forming; influence of specific taxa on assessment of the IBI; regional applications for areas where the IBI had not previously been developed; and specific applications of the IBI developed for coldwater streams, inland lakes, Great Lakes, reservoirs, and tailwaters.
Publisher: CRC Press
ISBN: 1000102882
Category : Science
Languages : en
Pages : 692
Book Description
This book examines the application of fish community characteristics to evaluate the sustainability and biological integrity of freshwaters. Topics include perspectives on use of fish communities as environmental indicators in program development, collaboration, and partnership forming; influence of specific taxa on assessment of the IBI; regional applications for areas where the IBI had not previously been developed; and specific applications of the IBI developed for coldwater streams, inland lakes, Great Lakes, reservoirs, and tailwaters.
Assessment of Habitat, Fish Communities, and Streamflow Requirements for Habitat Protection, Ipswich River, Massachusetts, 1998-99
Author: David S. Armstrong
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 86
Book Description
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 86
Book Description