Aquatic Insect Community Structure And Secondary Production In Southcentral Alaska Streams With Contrasting Thermal And Hydrologic Regimes
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Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 449 |
Release | : 2002-10-10 |
Genre | : Science |
ISBN | : 0309082951 |
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 | : J. David Allan |
Publisher | : Springer Science & Business Media |
Total Pages | : 385 |
Release | : 2012-12-06 |
Genre | : Science |
ISBN | : 9401107297 |
Running waters are enormously diverse, ranging from torrential mountain brooks, to large lowland rivers, to great river systems whose basins occupy subcontinents. While this diversity makes river ecosystems seem overwhelmingly complex, a central theme of this volume is that the processes acting in running waters are general, although the settings are often unique. The past two decades have seen major advances in our knowledge of the ecology of streams and rivers. New paradigms have emerged, such as the river continuum and nutrient spiraling. Community ecologists have made impressive advances in documenting the occurrence of species interactions. The importance of physical processes in rivers has attracted increased attention, particularly the areas of hydrology and geomorphology, and the inter-relationships between physical and biological factors have become better understood. And as is true for every area of ecology during the closing years of the twentieth century it has become apparent that the study of streams and rivers cannot be carried out by excluding the role of human activities, nor can we ignore the urgency of the need for conservation. These developments are brought together in Stream Ecology: Structure and function of running waters, designed to serve as a text for advanced undergraduate and graduate students, and as a reference book for specialists in stream ecology and related fields.
Author | : U.S. Global Change Research Program |
Publisher | : Cambridge University Press |
Total Pages | : 193 |
Release | : 2009-08-24 |
Genre | : Business & Economics |
ISBN | : 0521144078 |
Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 611 |
Release | : 2009-03-17 |
Genre | : Nature |
ISBN | : 0309125391 |
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.
Author | : Simon D. Rundle |
Publisher | : |
Total Pages | : 396 |
Release | : 2002 |
Genre | : Nature |
ISBN | : |
Meiofauna are a diverse and numerous component of the fauna in freshwater ecosystems, but have been mostly ignored by freshwater scientists. Freshwater Meiofauna aims to raise the awareness of this enigmatic, microscopic component of the freshwater biota, by providing the first-ever, comprehensive review of their biology and ecology. The first section of the book gives indepth accounts of the systematics, morphological characteristics, life histories and ecological requirements of the main freshwater meiofaunal taxa (i.e. microturbellarians, rotifers, gastrotriches, nematodes, water mites, microcrustaceans and tardigrades). The second section then takes an integrated approach to review the current state-of-play in meiofaunal ecological research in freshwaters, addressing important issues, such as the importance of meiofaunal taxa in the trophic dynamics of freshwater ecosystems and the process underpinning the distribution patterns observed in meiofaunal assemblages. This book should appeal to a wide range of freshwater scientists, including novices in the study of freshwater meiobenthology and established researchers in freshwater ecology, for whom the meiofauna represent an unopened "black box". Our ultimate goal is that this book will serve to promote the idea that the zoology of freshwater habitats concerns more than just fish, macroinvertebrates and microbes.
Author | : |
Publisher | : |
Total Pages | : 348 |
Release | : 1986 |
Genre | : Mountain ecology |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 220 |
Release | : 2008 |
Genre | : Alien plants |
ISBN | : |
Describes a ranking system used to evaluate the potential invasiveness and impacts of 113 non-native plants to natural areas in Alaska. Species are ranked by a series of questions in four broad categories: ecosystem impacts, biological attributes, distribution, and control measures. Also included is a climate screening procedure to evaluate the potential for establishment in three ecogeographic regions of Alaska [Juneau, Fairbanks, Nome].
Author | : Murugesu Sivapalan |
Publisher | : |
Total Pages | : 534 |
Release | : 2006 |
Genre | : Nature |
ISBN | : 9781901502480 |
Author | : |
Publisher | : Government Printing Office |
Total Pages | : 310 |
Release | : 2005 |
Genre | : Gardening |
ISBN | : 9780160729966 |
NOTE: NO FURTHER DISCOUNT FOR THIS PRODUCT -- Significantly reduced price -- Overstock List Price Describes invasive, non-native plants moving into Alaska.
Author | : James H. Thorp |
Publisher | : Elsevier |
Total Pages | : 233 |
Release | : 2010-07-27 |
Genre | : Science |
ISBN | : 0080888003 |
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