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Patchiness And Ecological Organization Experimental Studies Within Stream Benthic Communities
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Book Synopsis Patchiness and Ecological Organization: Experimental Studies Within Stream Benthic Communities by : David Dickinson Hart
Download or read book Patchiness and Ecological Organization: Experimental Studies Within Stream Benthic Communities written by David Dickinson Hart and published by . This book was released on 1979 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stream Ecology written by James R. Barnes and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the papers included here were part of the Plenary Sym posium on The Testing of General Ecological Theory in Lotic Ecosys tems held in conjunction with the 29th Annual Meeting of the North American Benthological Society in Provo, Utah, April 28, 1981. Sev eral additional papers were solicited, from recognized leaders in certain areas of specialization, in order to round out the coverage. All of the articles have been critiqued by at least two or three re viewers and an effort was made to rely on authorities in stream and theoretical ecology. In all cases this has helped to insure accur acyand to improve the overall quality of the papers. However, as one of our purposes has been to encourage thought-provoking and even controversial coverage of the topics, material has been retained even though it may upset certain critical readers. It is our hope that these presentations will stimulate further research, encourage the fuller development of a theoretical perspective among lotic ecologists, and lead to the testing of general ecological theories in the stream environment.
Book Synopsis Physiological Ecology and Structure of Benthic Communities in a Woodland Stream by : Weldon Harold Reese
Download or read book Physiological Ecology and Structure of Benthic Communities in a Woodland Stream written by Weldon Harold Reese and published by . This book was released on 1966 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports a portion of a general ecological study of a stream under conditions of controlled flow and low levels of organic enrichment. It is concerned with the effects of experimental variations of light intensity and concentration of soluble organic enrichment imposed on seasonal variations of temperature and total light energy received upon the periphyton and benthic plants. Suitable enrichment was predicated on establishment and maintenance of an abundant growth of Sphaerotilus and involved the isolation and study of this organism in pure cultures, in laboratory streams as well as in the experimental stream. Abundant growth of Sphaerotilus was obtained in cultures at temperatures of 5, 10, 15, 20, 25, and 30°C while in the laboratory streams and the experimental stream, the organism produced abundant growths at a range of temperatures from 2 to 12°C. A variety of carbon and nitrogen sources was investigated for maintenance of growth of Sphaerotilus. Abundant growth was produced when the enrichment included a specific nitrogen source combined with a specific carbon source. A carbon-nitrogen ratio of 8 to 1 proved satisfactory for maintaining Sphaerotilus in the stream. An investigation of the cropping effect of stream snails indicated that the presence of large numbers of snails decreased the standing crop of Sphaerotilus both in the laboratory streams and the experimental stream. A method was devised for determining the daily mean percentages of full sunlight reaching the four experimental sections of Berry Creek. Approximately 4 percent reached the shaded sections and 50 percent reached the light sections during the summer months. The range of mean saturating light intensities on the four experimental sections was from 250 to 950 footcandles. Methods designed to sample the plant communities in the experimental sections of the stream included: artificial substrates (microscope slides) used to observe the density and diversity of micro-algae; a system of grids used to record distribution of the plant biomass; and the removal of a portion of the stream substrate for the detailed examination of the benthic community. Both microscopic and macroscopic observations indicated that twice as many species and greater numbers of autotrophic organisms were present in the unenriched than in the enriched sections. Sub-samples of the harvested and homogenized materials scoured from the stream substrate, were used to determine biomass, organic matter, caloric content and pigment content. The biomasses from the enriched sections were greater than those from the unenriched sections, but contained large amounts of silt and were lower in organic matter and caloric content. The mean percentages of organic matter for the sections were: shaded, unenriched-33; light, unenriched-42; shaded, enriched-19 and light, enriched-19. The range of chlorophyll a from the four experimental sections was 0.03 to 0.28 g/m2. The concentration of chlorophyll, when representing spatial and seasonal variations, is an acceptable measure of the productive ability of communities in shallow, rapidly flowing streams. A photosynthesis-respiration chamber was used to determine primary production and community respiration for each of the experimental sections. The range of rates of gross primary production expressed as mean O2, g /m2/day for the unenriched sections was 0.62-2.47 and 0.53-0.59 for the enriched sections. Annual rates of gross primary production in glucose equivalents ranged from 0.07 kg/m2 for the enriched sections to 0.30 for the unenriched. The stream communities were characterized as heterotrophic communities with production-respiration ratios ranging from 0.47-0.65 for the unenriched and 0.16-0.20 for the enriched sections. The efficiency of the fixation of light energy as organic matter was 1.90-2.23 for the unenriched and 0.37-2.70 for the enriched sections. The photosynthetic efficiencies of the communities on the experimental sections of Berry Creek were much lower than those reported for most laboratory communities, but were comparable to other natural aquatic communities.
Download or read book The Stream Ecosystem written by and published by . This book was released on 1969 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cascading Trophic Interactions in Experimental Stream Benthic Communities by : Sharon L. Dewey
Download or read book Cascading Trophic Interactions in Experimental Stream Benthic Communities written by Sharon L. Dewey and published by . This book was released on 1990 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Algal Ecology written by and published by Academic Press. This book was released on 1996-06-03 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Algae are an important component of aquatic benthic ecosystems because they reflect the health of their environment through their density, abundance, and diversity. This comprehensive and authoritative text is divided into three sections to offer complete coverage of the discussion in this field. The first section introduces the locations of benthic algae in different ecosystems, like streams, large rivers, lakes, and other aquatic habitats. The second section is devoted to the various factors, both biotic and abiotic, that affect benthic freshwater algae. The final section of the book focuses on the role played by algae in a variety of complex freshwater ecosystems. As concern over environmental health escalates, the keystone and pivotal role played by algae is becoming more apparent. This volume in the Aquatic Ecology Series represents an important compilation of the latest research on the crucial niche occupied by algae in aquatic ecosystems. Presents algae as the important player in relation to environmental health Prepared by leading authorities in the field Includes comprehensive treatment of the functions of benthic algae as well as the factors that affect these important aquatic organisms Acts as an important reference for anyone interested in understanding and managing freshwater ecosystems
Book Synopsis Direct and Indirect Effects of the Black Fly (Diptera: Simuli Idae) Larvicide, Bacillus Thuringiensis Var. Israelensis, on Selected Non- Target Aquatic Insects and Trout by : Mark Steven Wipfli
Download or read book Direct and Indirect Effects of the Black Fly (Diptera: Simuli Idae) Larvicide, Bacillus Thuringiensis Var. Israelensis, on Selected Non- Target Aquatic Insects and Trout written by Mark Steven Wipfli and published by . This book was released on 1992 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Flow on Benthic Invertebrates and Community Organization in Experimental Streams by : Juan Bosco Imbert
Download or read book Influence of Flow on Benthic Invertebrates and Community Organization in Experimental Streams written by Juan Bosco Imbert and published by . This book was released on 1996 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Biology and Ecology of Streams and Rivers by : Alan Hildrew
Download or read book The Biology and Ecology of Streams and Rivers written by Alan Hildrew and published by Oxford University Press. This book was released on 2023-06-19 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: The challenges that the world's running water systems now face have never been more numerous or acute; at the same time, these complex habitats remain absolutely crucial to human wellbeing and future survival. If rivers can ever be anything like sustainable, ecology needs to take its place as an equal among the physical sciences such as hydrology and geomorphology. A real understanding of the natural history and ecology of running waters must now be brought even more prominently into river management. The primary purpose of this textbook is to provide the up-to-date overview that students and practitioners will require to achieve this aim. The book's unifying focus is on rivers and streams as ecosystems in which the particular identity of organisms is not the main emphasis but rather the processes in which they are involved - specifically energy flow and the cycling of materials. It builds on the physicochemical foundations of the habitat templet and explores the diversity and adaptations of the biota, progressing from the population and community ecology of organisms and linking them to ecosystem processes and services in the wider biosphere via the complexities of species interactions and food webs. These include water quality and patterns of river discharge, as well as aesthetics, waste disposal, and environmental health. While the book is not primarily focused on application per se, each chapter addresses how humans affect rivers and, in turn, are affected by them. A final, future-oriented chapter identifies key strategic areas and sets a roadmap for integrating knowledge of natural history and ecology into policy and management. The Biology and Ecology of Streams and Rivers is an accessible text suitable for both senior undergraduate and graduate students taking courses in both lotic and general ecology as well as more established researchers, practitioners, managers, and conservationists requiring a concise and contemporary overview of running waters.
Book Synopsis Regulated Streamflow and Warmwater Stream Fish by : Mark B. Bain
Download or read book Regulated Streamflow and Warmwater Stream Fish written by Mark B. Bain and published by . This book was released on 1989 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Disturbance and Refugia in the Ecology of Stream Benthic Communities by : Charlotte Gjerlov
Download or read book Disturbance and Refugia in the Ecology of Stream Benthic Communities written by Charlotte Gjerlov and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rivers Handbook written by and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods in Stream Ecology by : F. Richard Hauer
Download or read book Methods in Stream Ecology written by F. Richard Hauer and published by Academic Press. This book was released on 2011-04-27 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods in Stream Ecology, Second Edition, provides a complete series of field and laboratory protocols in stream ecology that are ideal for teaching or conducting research. This updated edition reflects recent advances in the technology associated with ecological assessment of streams, including remote sensing. In addition, the relationship between stream flow and alluviation has been added, and a new chapter on riparian zones is also included. The book features exercises in each chapter; detailed instructions, illustrations, formulae, and data sheets for in-field research for students; and taxanomic keys to common stream invertebrates and algae. With a student-friendly price, this book is key for all students and researchers in stream and freshwater ecology, freshwater biology, marine ecology, and river ecology. This text is also supportive as a supplementary text for courses in watershed ecology/science, hydrology, fluvial geomorphology, and landscape ecology. Exercises in each chapter Detailed instructions, illustrations, formulae, and data sheets for in-field research for students Taxanomic keys to common stream invertebrates and algae Link from Chapter 22: FISH COMMUNITY COMPOSITION to an interactive program for assessing and modeling fish numbers
Book Synopsis Commencement Ceremony by : University of California, Davis. Graduate Division
Download or read book Commencement Ceremony written by University of California, Davis. Graduate Division and published by . This book was released on 1976 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Patterns and Processes in Stream Ecology by : David Dudgeon
Download or read book Patterns and Processes in Stream Ecology written by David Dudgeon and published by Balogh Scientific Books. This book was released on 1992 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessing the Ecological Integrity of Running Waters by : M. Jungwirth
Download or read book Assessing the Ecological Integrity of Running Waters written by M. Jungwirth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assessment of the ecological integrity of running waters is a prerequisite to an understanding of the effects of human alterations. The evaluation of degradation processes provides key information on how to avoid further negative impacts. The success of future conservation, mitigation and restoration activities will rely on sound assessment methodologies and their ecological relevance and applicability. Assessment methodologies are therefore an integral part of sustainable river management. This book synthesizes and discusses state-of-the-art experiences in assessment methodologies. Including the latest knowledge on structures, processes and functions of running waters as a fundamental basis for developing adequate assessment methods, the book focuses on method development, application, and in particular on integrated assessment methods. This book is directed at scientists and managers with the aim of more effective preservation, restoration and maintenance of the ecological integrity of running water ecosystems.
