Aquatic Insect Community Structure And Secondary Production In Southcentral Alaska Streams With Contrasting Thermal And Hydrologic Regimes
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Aquatic Insect Community Structure And Secondary Production In Southcentral Alaska Streams With Contrasting Thermal And Hydrologic Regimes
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Author : Samantha Diane Hertel
language : en
Publisher:
Release Date : 2016
Aquatic Insect Community Structure And Secondary Production In Southcentral Alaska Streams With Contrasting Thermal And Hydrologic Regimes written by Samantha Diane Hertel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Community Structure And Secondary Production Of Aquatic Macroinvertebrates In Coastal Wetland Ponds Of The West Copper River Delta Alaska Following Tectonic Uplift
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Author : Ryan G. Van Duzor
language : en
Publisher:
Release Date : 2011
Community Structure And Secondary Production Of Aquatic Macroinvertebrates In Coastal Wetland Ponds Of The West Copper River Delta Alaska Following Tectonic Uplift written by Ryan G. Van Duzor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Freshwater invertebrates categories.
The Great Alaska Earthquake of 1964 (magnitude 9.2) greatly altered the coastal landscape in southcentral Alaska and had particularly dramatic effects on the Copper River Delta (CRD), an ecologically and economically important area within the Chugach National Forest. The earthquake caused tectonic uplift (up to 3.5m) of the CRD coastal tidal marsh and transformed it into a perched freshwater marsh. Copper River Delta ponds, which are crucial habitat to a myriad of migrating songbirds, shorebirds, and waterfowl, are of particular interest to wildlife managers in the CRD and along the Pacific coasts of North, Central and South America. This study was conducted to characterize the general ecology of CRD ponds, with particular focus on aquatic insect communities. Twelve ponds in two geomorphologic zones were studied to compare physicochemical characteristics, aquatic insect community structure and annual secondary production. Six ponds were in the Uplifted Marsh (UM), which was formed as a result of the tectonic uplift, and six ponds were in the Outwash Plain (OP), an area that was present before the earthquake and was relatively unaffected by tectonic activity. Uplifted Marsh and OP ponds were similar with respect to basic physicochemical parameters. Callicorixa vulnerata (Uhler 1861) (Hemiptera: Corixidae) was the numerically dominant non-dipteran taxon in 11 of the 12 study ponds and represented 30-81 % of all non-dipterans collected. Densities of the numerically dominant predators, Aeshna spp. (Odonata: Aeshnidae) and Enallagma spp. (Odonata: Coenagrionidae) were higher in OP ponds (
Aquatic Insect Community Structure And Secondary Production In Streams Of Low And Circumneutral Ph In The Appalachian Mountains Of West Virginia
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Author : Dawn Marie Kobuszewski
language : en
Publisher:
Release Date : 1992
Aquatic Insect Community Structure And Secondary Production In Streams Of Low And Circumneutral Ph In The Appalachian Mountains Of West Virginia written by Dawn Marie Kobuszewski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Acid pollution of rivers, lakes, etc categories.
Riparian Areas
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2002-10-10
Riparian Areas written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-10-10 with Science categories.
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.
The Riverine Ecosystem Synthesis
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Author : James H. Thorp
language : en
Publisher: Elsevier
Release Date : 2010-07-27
The Riverine Ecosystem Synthesis written by James H. Thorp and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-07-27 with Science categories.
This book presents the most comprehensive model yet for describing the structure and functioning of running freshwater ecosystems. Riverine Ecosystems Synthesis (RES) is a result of combining several theories published in recent decades, dealing with aquatic and terrestrial systems. New analyses are fused with a variety of new perspectives on how river network ecosystems are structured and function, and how they change along longitudinal, lateral, and temporal dimensions. Among these novel perspectives is a dramatically new view of the role of hydrogeomorphic forces in forming functional process zones from headwaters to the mouths of great rivers. Designed as a useful tool for aquatic scientists worldwide whether they work on small streams or great rivers and in forested or semi-arid regions, this book will provide a means for scientists to understand the fundamental and applied aspects of rivers in general and includes a practical guide and protocols for analyzing individual rivers. Specific examples of rivers in at least four continents (Africa, Australia, Europe and North America) serve to illustrate the power and utility of the RES concept. Develops the classic, seminal article in River Research and Applications, "A Model of Biocomplexity in River Networks Across Space and Time" which introduced the RES concept for the first time A guide to the practical analysis of individual rivers, extending its use from pristine ecosystems to modern, human-modified rivers An essential aid both to the study fundamental and applied aspects of rivers, such as rehabilitation, management, monitoring, assessment, and flow manipulation of networks
Freshwater Biodiversity
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Author : David Dudgeon
language : en
Publisher: Cambridge University Press
Release Date : 2020-05-21
Freshwater Biodiversity written by David Dudgeon and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-21 with Nature categories.
Fresh waters are disproportionately rich in species, and represent global hotspots of biodiversity. However, they are also hotspots of endangerment.
Urban Stormwater Management In The United States
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2009-03-17
Urban Stormwater Management In The United States written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-03-17 with Nature categories.
The rapid conversion of land to urban and suburban areas has profoundly altered how water flows during and following storm events, putting higher volumes of water and more pollutants into the nation's rivers, lakes, and estuaries. These changes have degraded water quality and habitat in virtually every urban stream system. The Clean Water Act regulatory framework for addressing sewage and industrial wastes is not well suited to the more difficult problem of stormwater discharges. This book calls for an entirely new permitting structure that would put authority and accountability for stormwater discharges at the municipal level. A number of additional actions, such as conserving natural areas, reducing hard surface cover (e.g., roads and parking lots), and retrofitting urban areas with features that hold and treat stormwater, are recommended.
Alaska S Ecology
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Author : Robin Dublin
language : en
Publisher:
Release Date : 2001-01-01
Alaska S Ecology written by Robin Dublin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-01 with categories.
Covers living and non-living elements of ecosystems, food chains, webs and pyramids, interactions within ecosystems, biodiversity and kingdoms, investigations tudies, role of people within ecosystems, renewable and non-renewable resources.
Stream Corridor Restoration
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Author :
language : en
Publisher: National Technical Info Svc
Release Date : 1998
Stream Corridor Restoration written by and has been published by National Technical Info Svc this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Technology & Engineering categories.
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.
Global Climate Change Impacts In The United States
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Author : U.S. Global Change Research Program
language : en
Publisher: Cambridge University Press
Release Date : 2009-08-24
Global Climate Change Impacts In The United States written by U.S. Global Change Research Program and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-08-24 with Business & Economics categories.
Summarizes the science of climate change and impacts on the United States, for the public and policymakers.