Download or read book Aquatic insect community structure and secondary production in southcentral Alaska streams with contrasting thermal and hydrologic regimes written by Samantha Diane Hertel and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 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 published by . This book was released on 2011 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 (
Download or read book 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 published by . This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Insects of South Central Alaska written by Dominique M. Collet and published by Branch Line Video. This book was released on 2008 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Insects in Alaska written by John Hudson and published by . This book was released on 2012 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Insect Responses to Hydrologic Intermittency and Organic Enrichment in Headwater Streams written by Rosalie Bernardino Del Rosario and published by . This book was released on 2000 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Contribution of Allochthonous and Autochthonous Organic Material to Aquatic Insect Secondary Production Rates in a North Temperate Stream written by Bruce W. Schwenneker and published by . This book was released on 1986 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical and Biological Water Quality of Selected Streams in the Beluga Coal Area Alaska written by Mary A. Maurer and published by . This book was released on 1988 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Stream Channel Alterations on Aquatic Insect Communities written by Scott J. Reger and published by . This book was released on 1980 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fish Community Structure in a Hydrologically Variable Stream written by Teresa Anne Capone and published by . This book was released on 1988 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Community Responses to Stream Restoration written by Aaron Eugene Martin and published by . This book was released on 2007 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Many aquatic ecosystems in the Pacific Northwest have been impacted by land use activities. Often these impacts have resulted in deleterious effects that directly or indirectly limited the capacity of habitat to produce fish. Habitat restoration potentially increases the quantity and quality of resources available to the aquatic communities within these impaired systems, thus increasing biotic integrity and fish production. In this study, responses of aquatic communities exposed to woody debris bundle and salmon analog additions were measured in the year following creation of off-channel, fish habitat in southcentral Alaska. Biofilm, invertebrates and juvenile coho salmon, Oncorhynchus kisutch, were sampled in four treatment types (control, wood, analog, and analog+wood). Biofilm significantly increased in analog enriched treatments. No treatment effects were detected in benthic invertebrate responses, however, treatment differences were detected in coho diets. Coho density and standing stock were significantly higher in the wood treatment, and coho in the control treatment showed signs of density-dependent limitations. Condition for fish was highest in the analog enriched treatments after treatment additions. These results suggest salmon analog and woody debris bundle additions may be viable short-term restoration tools, providing a boost in food and shelter for aquatic communities in habitats undergoing restoration"--Leaf iii.
Download or read book Studies on the Aquatic Insects of Southeastern Alaska with an Emphasis on the Skagway Area written by Kimberly T. Huntzinger and published by . This book was released on 2003 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Riparian Areas written by National Research Council and published by National Academies Press. This book was released on 2002-10-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Alaska s Ecology written by Robin Dublin and published by . This book was released on 2001-01-01 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book The Riverine Ecosystem Synthesis written by James H. Thorp and published by Elsevier. This book was released on 2010-07-27 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Global Climate Change Impacts in the United States written by U.S. Global Change Research Program and published by Cambridge University Press. This book was released on 2009-08-24 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
Download or read book An Ecological Characterization of Rocky Mountain Montane and Subalpine Wetlands written by and published by . This book was released on 1986 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
