Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 24

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Book Description

Author: Larry L. Larson
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 33

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Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 61

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Book Description

Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 67

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Book Description

Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 68

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Book Description

Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 51

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Impacts of shore anglers to Kenai River riparian habitats were assessed in 3 river reaches during the 2000 fishing season. A total of 10,114 shore anglers were counted, 48.2% on private land and 51.8% on public land. Over 90% of anglers fished from mainland banks rather than islands or gravel bars. Of those using mainland banks, 19.3% used boardwalks or other structures, 51.5% stood in the water, and 29.2% stood on the bank. At bank measurement survey sites (n = 172), there were no significant effects on annual bank change (June 1999 to June 2000) for boat activity, stream meander, or habitat type. Cumulative change (June 1998 to June 2000) was significant for boat activity, with a mean loss of 0.26 m. At angler-effort survey sites (n = 42), annual bank change was significantly affected by site position relative to stream meander and 1999 angler effort but not habitat type or boat activity. Increased bank loss occurred at sites located on the outside of a meander and those having high levels of angler effort. Cumulative bank change showed no significant effects of habitat type, boat activity, or stream meander, but a significant effect of cumulative angler effort (1997 and 1998); bank loss increased with increased angler effort. At vegetation analysis sites (n = 12), inseason angler effort had a significant effect on mean percent change in cover of vegetation, litter, and bare ground, but not water; vegetation cover decreased and litter and bare ground increased with increased effort. Angler effort in 1999 had no significant effect on annual vegetation cover change (1999-2000). The same was true for cumulative effort (1997-1999) and cumulative change (1997-2000), indicating that vegetation cover may recover between seasons. Measurement error tests were conducted for both bank position measurements (±0.5 m) and vegetation cover (

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309169771
Category : Science
Languages : en
Pages : 448

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The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.

Author: Mary A. King
Publisher:
ISBN:
Category : Fishing
Languages : en
Pages : 43

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Effects of shore anglers on bank erosion and vegetation in Kenai River riparian habitats were assessed during the 2001 fishing season. The mean number of anglers counted in each of 40 survey sites varied from 0 to 7.3, and angler effort at these sites ranged from 0 to 2,784 angler-hours. Changes in bank position were measured annually from 1998 to 2001 and analyses for cumulative effects of angler effort (1998-2000), power boat activity level, stream meander, and habitat type on bank loss (1998-2001) showed a significant effect for angler effort (P 0.001); increased bank loss was associated with increased angler effort. Inseason angler effort had a significant effect on mean change in percent cover of vegetation (negative relationship) and water (positive relationship). There was no significant effect of cumulative angler effort (1998-2000) on changes in percent cover (1999-2001) in litter, but there were marginally significant effects on changes in percent cover of vegetation (negative relationship) and bare ground (positive relationship) and a significant effect of angler effort on the percent cover of water (positive relationship). Species composition analyses using Shannon diversity and evenness indices showed that there were significant effects of cumulative angler effort (1998-2000) on plant species diversity and evenness (1997-2001); both significantly decreased with increased angler effort. The cover of grasses, dandelions, and horsetails (Calamagrostis spp., Taraxacum spp., and Equisetum spp., respectively), was assessed for 1997 to 2001. Sites with high levels of angler effort (800 angler-hours) had a mean loss in percent cover of grasses (2.3%) and a mean increase in percent cover of dandelions (3.6%) and horsetails (8.6%). At sites with low levels of angler effort (

Author:
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 184

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Book Description

Author: George Patrick Malanson
Publisher: Cambridge University Press
ISBN: 0521384311
Category : Nature
Languages : en
Pages : 308

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Book Description
Riparian Landscapes examines the ecological systems of streamside and floodplain areas from the perspective of landscape ecology. The specific spatial pattern of riparian vegetation is seen as a result of, and a control on, the ecological, geomorphological, and hydrological processes that operate along rivers. Riparian structures are controlled by the spatial dynamics of channels, flooding and soil moisture. These dynamics are part of integrated cascades of water, sediment, nutrients and carbon, to which animal and plant species respond in ways that illuminate community structure and competition. The role of the riparian zone in controlling species distribution and abundance is discussed. Intelligent management of these valuable ecological resources is highlighted. The potential for linking hydrological, geomorphological and ecological simulation models is also explored. This book will be of interest to graduate and professional research workers in environmental science, ecology and physical geography.