Spatial Transition of the Fish Community and Environmental Characteristics in the White River Below Bull Shoals Dam PDF Download
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Author: Nicole E. Vogt
Publisher:
ISBN:
Category : Bull Shoals Lake (Ark. and Mo.)
Languages : en
Pages : 126
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Book Description
"Anthropogenic impacts have resulted in long-term alterations in the physical features, water quality, and fish communities in most river ecosystems. Cold water releases from the hypolimnion of Bull Shoals Reservoir results in a cold water tailwater and facilitates a trout fishery. Relationships between the fish community and environmental variables of the hydrologically altered lower White River, Arkansas were investigated. In the summer of 2010, a total of 44 sites located every 15 kilometers from the confluence with the Mississippi River to Bull Shoals Dam were sampled. Environmental variables including water quality and river morphometrics were measured. Eighty-three fish species were collected from 20 different families. Canonical correspondence analysis identified water temperature, rock substrate, turbidity, depth, dissolved oxygen, and macrophytes as the most important variables in structuring the riverine fish community. Two-way cluster analysis identified four river environment classifications (tailwater, fast-cool, down river-warm water, and deep-slow) and five fish community classifications (common species, tailwater, cool-riverine, up river-warm water, and down river-warm water). The temperature effects from Bull Shoals Dam extends more than 200 km downstream, but may change seasonally. The river environment and fish assemblage classifications are driven by hypolimnetic releases in the White River that alters the river continuum." --Abstract.
Author: Nicole E. Vogt
Publisher:
ISBN:
Category : Bull Shoals Lake (Ark. and Mo.)
Languages : en
Pages : 126
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Book Description
"Anthropogenic impacts have resulted in long-term alterations in the physical features, water quality, and fish communities in most river ecosystems. Cold water releases from the hypolimnion of Bull Shoals Reservoir results in a cold water tailwater and facilitates a trout fishery. Relationships between the fish community and environmental variables of the hydrologically altered lower White River, Arkansas were investigated. In the summer of 2010, a total of 44 sites located every 15 kilometers from the confluence with the Mississippi River to Bull Shoals Dam were sampled. Environmental variables including water quality and river morphometrics were measured. Eighty-three fish species were collected from 20 different families. Canonical correspondence analysis identified water temperature, rock substrate, turbidity, depth, dissolved oxygen, and macrophytes as the most important variables in structuring the riverine fish community. Two-way cluster analysis identified four river environment classifications (tailwater, fast-cool, down river-warm water, and deep-slow) and five fish community classifications (common species, tailwater, cool-riverine, up river-warm water, and down river-warm water). The temperature effects from Bull Shoals Dam extends more than 200 km downstream, but may change seasonally. The river environment and fish assemblage classifications are driven by hypolimnetic releases in the White River that alters the river continuum." --Abstract.
Author: Sandra J.. Clark
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 324
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Book Description
Abstract: Floodplain lakes have been extensively studied in tropical systems, but little is known about the influence of connectivity on floodplain lake fish communities in temperate systems. Relationships between floodplain lake connectivity and fish community dynamics within the White River National Wildlife Refuge, Arkansas were investigated and temporal patterns of fish communities were characterized. In 2002,2004, and 2005, a total of 41 floodplain lakes were sampled using various combinations of gears including: boat electrofishing, experimental gill nets, mini-fyke nets, and large-mesh gill nets. Environmental variables including water quality, lake morphometrics, and quantitative measures of connectivity were measured for each lake. Canonical correspondence analysis identified temperature, lake shape, type of connection, and start date of connection as most important in the structuring of floodplain lake fish communities. Three floodplain lake classification types were generated with large, deep, long, and narrow lakes with great temporal connection via a slough or bayou having greater abundances of rheophilic species. Intermediate size, shape, depth, and connectivity lakes were associated with rheophilic and more lacustrine species; while small, shallow, round lakes with low temporal connection due to overbank connection were associated with more lacustrine species. Five floodplain lakes followed over the entire 4-year period (2002,2004, and 2005) demonstrated a shift from cyprinid to cyprinid/centrarchid dominated systems; however, no temporal changes in richness or diversity were found. Previous year's connectivity may have influenced dominance shifts more rheophilic species toward more lacustrine species in subsequent years as connectivity conditions changed. Eight floodplain lakes were sampled during periods of documented with some lakes becoming completely inundated during high stage conditions while others were only connected via a ditch. During connection, lakes with complete inundation had lower catch per unit effort and diversity than lakes with ditch connection. It seems likely that fish dispersed from inundated lakes into the floodplain for spawning. Additionally, measured spatial and temporal connection gradients appeared to influence fish communities in floodplain lakes during periods of connection and disconnection. Connectivity is more important in influencing floodplain lake fish communities than previously documented.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9789251046944
Category : Business & Economics
Languages : en
Pages : 180
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Book Description
The importance of free longitudinal passage of river fauna is stressed.
Author:
Publisher:
ISBN:
Category : Fish habitat improvement
Languages : en
Pages : 342
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 9780309045346
Category : Technology & Engineering
Languages : en
Pages : 580
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Book Description
Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.
Author:
Publisher: National Technical Info Svc
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 648
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Book Description
This document is a cooperative effort among fifteen Federal agencies and partners to produce a common reference on stream corridor restoration. It responds to a growing national and international interest in restoring stream corridors.
Author: Michael Goulding
Publisher: Univ of California Press
ISBN: 0520316134
Category : Science
Languages : en
Pages : 292
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Book Description
This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1980.
Author: Leandro Miranda
Publisher:
ISBN: 9780692798720
Category :
Languages : en
Pages : 306
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Book Description
Author: Frederick T. Short
Publisher: Univ of California Press
ISBN: 9780520240476
Category : Nature
Languages : en
Pages : 336
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Book Description
Seagrasses are a vital and widespread but often overlooked coastal marine habitat. This volume provides a global survey of their distribution and conservation status.
Author: United States. Environmental Protection Agency. Office of Water
Publisher:
ISBN:
Category : Water quality bioassay
Languages : en
Pages : 344
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Book Description
