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Ecological And Management Implications Of Multi Scale Environmental Influences On Stream Fish Assemblages
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Book Synopsis Ecological and Management Implications of Multi-scale Environmental Influences on Stream Fish Assemblages by : Adam Robert Kautza
Download or read book Ecological and Management Implications of Multi-scale Environmental Influences on Stream Fish Assemblages written by Adam Robert Kautza and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results from my work suggest that (1) the relative importance of landscape- and local-level environmental factors, and the contribution of spatial structure, may be distinct in regions characterized by different levels of human impact, and (2) approaches that incorporate and evaluate watershed-scale processes may be particularly valuable not only for understanding complex environment-fish relationships, but also for monitoring and conservation applications related to stream fishes.
Book Synopsis Patterns in Functional Structure and Diversity of Stream Fish Assemblages Related to Environmental Factors at Multiple Scales by : Allison Ann Pease
Download or read book Patterns in Functional Structure and Diversity of Stream Fish Assemblages Related to Environmental Factors at Multiple Scales written by Allison Ann Pease and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The distribution and abundance of stream fishes are influenced by many factors operating at multiple scales. Understanding how environmental variables influence the structure of stream fish assemblages is important for habitat assessment, stream restoration, and for predicting responses to environmental change. An emerging view in community ecology is that a focus on the functional structure of species assemblages in relation to environmental gradients may reveal more general patterns applicable across geographic regions. In this study, I used functional traits related to the trophic ecology, habitat use, and life-history strategies of fishes to examine the influences of environmental factors on stream fish assemblages. The research was carried out in two large regions: the Río Grijalva basin in southern Mexico and the Brazos and Trinity basins in Central Texas. In both regions, relationships between functional structure of stream fish assemblages and environmental factors at local, landscape, and regional scales were examined. Environmental characteristics at all three scales influenced the functional attributes of assemblages studied here. At the local reach scale, stream size, substrate characteristics, the availability of riffle and pool habitats, and abundance of in-stream cover structures were related to the functional trait composition of fish assemblages in the Río Grijalva Basin and in Central Texas streams. Landscape features most strongly related to functional structure in both regions were the extent of forested area in the watershed and the amount of land developed for urban and agricultural uses. At the regional scale, broad physiographic differences between ecoregions had a large influence on the taxonomic and functional composition of stream fish assemblages in Central Texas. Along the broad-scale longitudinal fluvial gradient of the Grijalva region, pronounced changes in the species composition, functional trait diversity, and trophic structure of fish assemblages were observed.
Book Synopsis ADVANCES IN UNDERSTANDING LANDSCAPE INFLUENCES ON FRESHWATER HABITATS AND BIOLOGICAL ASSEMBLAGES. by :
Download or read book ADVANCES IN UNDERSTANDING LANDSCAPE INFLUENCES ON FRESHWATER HABITATS AND BIOLOGICAL ASSEMBLAGES. written by and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Geographical Framework for Assessing Longitudinal Patterns in Stream Habitat and Fish Distribution by : Christian E. Torgersen
Download or read book A Geographical Framework for Assessing Longitudinal Patterns in Stream Habitat and Fish Distribution written by Christian E. Torgersen and published by . This book was released on 2002 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: New approaches are needed to quantify and understand spatial patterns of stream fishes and their environment. Concepts in riverine ecology emphasize the importance of thermal zones and gradual longitudinal changes in physical habitat and biota, but little is known about spatial variability within the river continuum. I present a conceptual framework for assessing patterns in streams that are difficult to detect using standard site-based approaches to sampling. The ability to detect pattern is defined as the scope, or the ratio of extent (the distance, area, or volume encompassing all sample points) to grain size (the size of an individual sample unit). By increasing the scope and continuity of sampling, I illustrate how greater sampling effort can reveal new patterns and unexpected relationships between stream fishes and their environment. Merging geography and stream ecology, I describe new approaches including remote sensing, multiscale sampling, and extensive surveys for assessing longitudinal patterns in stream habitat and fish distribution. Airborne thermal infrared remote sensing was effective for quantifying spatially continuous patterns of water temperature over a range of scales from channel units (10-50 m) to entire river sections (30-70 km). To examine factors influencing the spatial distribution of larval Pacific lamprey, a benthic fish species, I applied a nested sampling design and determined that stream habitat variables predicted patterns in larval abundance but played different roles at different spatial scales. Increases in the scope of data collection required adaptations in statistical analysis in order to accommodate larger and more complex ecological datasets. I evaluated multivariate ordination techniques with respect to their ability to describe fish community structure and found that nonparametric multivariate smoothing of presence-absence data was highly effective for detecting patterns in heterogeneous fish assemblage data. Spatially continuous analysis presented challenges in extracting patterns from noisy ecological data but provided the opportunity to evaluate distributional patterns over a range of spatial scales. I examined spatial variability of stream fish assemblages and observed that the relative influences of temperature and channel morphology on fish assemblage structure were dependent on the thermal context and the spatial scale of analysis.
Book Synopsis Landscape Influences on Stream Habitats and Biological Assemblages by : Robert M. Hughes
Download or read book Landscape Influences on Stream Habitats and Biological Assemblages written by Robert M. Hughes and published by . This book was released on 2006 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linkages among landscape and associated physiochemical and biological characteristics of rivers are explored in the proceedings of a symposium, organized to foster communication among researchers, resource managers, and policy makers in landscape ecology, geographical information systems, and other related fields.
Book Synopsis Perspectives in Tropical Limnology by : F. Schiemer
Download or read book Perspectives in Tropical Limnology written by F. Schiemer and published by . This book was released on 1996 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :H. John Heinz III Center for Science, Economics, and the Environment Publisher :Cambridge University Press ISBN 13 :9780521525725 Total Pages :294 pages Book Rating :4.5/5 (257 download)
Book Synopsis The State of the Nation's Ecosystems by : H. John Heinz III Center for Science, Economics, and the Environment
Download or read book The State of the Nation's Ecosystems written by H. John Heinz III Center for Science, Economics, and the Environment and published by Cambridge University Press. This book was released on 2002-09-09 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: We all rely on a familiar set of indicators - interest rates, unemployment, inflation, the Dow Jones index, and GDP, for example - to gauge the performance of national economies. No such measures are currently available to describe the environment. This book lays out a blueprint for periodic reporting on the condition and use of ecosystems in the United States. Developed by experts from businesses, environmental organizations, universities, and federal, state, and local government agencies, it is designed to provide policymakers and the general public with a succinct and comprehensive - yet scientifically sound and non-partisan - view of 'how we are doing'. This book should prove invaluable for decision makers in natural resource management and environmental policy in government and environmental organizations, businesses, and trade associations; academics with a research or teaching interest in environmental issues; and the general public interested in the continued well-being of American ecosystems.
Book Synopsis Modelling Community Structure in Freshwater Ecosystems by : Sovan Lek
Download or read book Modelling Community Structure in Freshwater Ecosystems written by Sovan Lek and published by Springer Science & Business Media. This book was released on 2005-02-14 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents approaches and methodologies for predicting the structure and diversity of key aquatic communities (namely, diatoms, benthic macroinvertebrates and fish), under natural conditions and under man-made disturbance. The intent is to offer an organized means for modeling, evaluating and restoring freshwater ecosystems.
Book Synopsis Riverine Ecosystem Management by : Stefan Schmutz
Download or read book Riverine Ecosystem Management written by Stefan Schmutz and published by Springer. This book was released on 2018-05-08 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book surveys the frontier of scientific river research and provides examples to guide management towards a sustainable future of riverine ecosystems. Principal structures and functions of the biogeosphere of rivers are explained; key threats are identified, and effective solutions for restoration and mitigation are provided. Rivers are among the most threatened ecosystems of the world. They increasingly suffer from pollution, water abstraction, river channelisation and damming. Fundamental knowledge of ecosystem structure and function is necessary to understand how human acitivities interfere with natural processes and which interventions are feasible to rectify this. Modern water legislation strives for sustainable water resource management and protection of important habitats and species. However, decision makers would benefit from more profound understanding of ecosystem degradation processes and of innovative methodologies and tools for efficient mitigation and restoration. The book provides best-practice examples of sustainable river management from on-site studies, European-wide analyses and case studies from other parts of the world. This book will be of interest to researchers in the field of aquatic ecology, river system functioning, conservation and restoration, to postgraduate students, to institutions involved in water management, and to water related industries.
Book Synopsis Aquatic Habitat Assessment by : Mark B. Bain
Download or read book Aquatic Habitat Assessment written by Mark B. Bain and published by . This book was released on 1999 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Habitat is now the basis of most impact assessments and resource inventories, and it is the basis of many species management plans, mitigation planning, and environmental regulation. Habitats are relatively stable through time, easily defined in intuitive physical terms, and provide a tangible resource for negotiations and decision making. Numerous and varied methods of analyzing and reporting habitat conditions have been developed by federal, state, provincial, and private agencies. Habitat assessment approaches vary greatly among regions of the continent. The great variability in methods and an unusually wide range of practices have impeded the ability of agencies to share and synthesize information. A diversity of methods is desirable in the initial stages of a rapidly developing field, but enough time has passed to assess the state-of-knowledge and identify the best of the currently used methods and techniques. This manual is intended to provide fisheries biologists with a limited set of techniques for obtaining aquatic habitat data. The manual also describes the range of information collected and used in agency habitat analyses. Agencies planning habitat programs should review the synthesis of established and documented methods being used in North America (Appendix 1) and the planning recommendations in Chapter 2. Then, the remaining chapters should be reviewed to determine what types of habitat data should be included in the agency's program.
Book Synopsis Metacommunity Spatio-Temporal Dynamics: Conservation and Management Implications by : Pedro Giovâni Da Silva
Download or read book Metacommunity Spatio-Temporal Dynamics: Conservation and Management Implications written by Pedro Giovâni Da Silva and published by Frontiers Media SA. This book was released on 2021-05-18 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multi-scale Effects of Habitat Alteration on Stream Fishes by : Nathan Ryan Franssen
Download or read book Multi-scale Effects of Habitat Alteration on Stream Fishes written by Nathan Ryan Franssen and published by . This book was released on 2011 with total page 248 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.
Book Synopsis Influence of Streamflow Regime and Biotic Interactions on Fish Assemblage Structure in Rivers of the Northern Great Plains by : Valerie Kelly
Download or read book Influence of Streamflow Regime and Biotic Interactions on Fish Assemblage Structure in Rivers of the Northern Great Plains written by Valerie Kelly and published by . This book was released on 2009 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluates the functional organization of stream fish assemblages in response to streamflow factors and biotic interactions across a range of spatial scale. The study area for this project includes 109 stream reaches located on tributaries to the upper Missouri River in the northern Great Plains. Fish distribution data was provided by the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program. The analysis examined assemblage structure in terms of the distribution of ecological traits along gradients of streamflow regime, and proceeded in several phases. First, a methodology was assembled for estimating ecologically relevant metrics to describe streamflow regime where streamflow data were not available. Second, co-occurrence patterns for species and their traits were examined at two levels of spatial scale in order to evaluate the relative role of environmental filtering and competitive exclusion. Third, a structural equation analysis was conducted to examine the role of specific components of streamflow regime as constraints on the expression of fish life-history strategies within local assemblages, including an evaluation of factors across a range of scale that were associated with flow patterns. This analysis also incorporated an aggregate measure of the potential for biotic interactions at the assemblage scale. Results for the streamflow analysis describe distinctive regional patterns of flow regime across the study area. A clear snowmelt signature was observed for streams in the western mountains, with little variability in peak-flow magnitude or timing. These streams contrast with those in the lowlands further east, which were consistently characterized by greater variability in peak-flow timing and magnitude as well as higher probability of intermittent flow. Species co-occurrence patterns were consistent with a strong tendency for local coexistence to be mediated primarily by present or past competition, resulting in spatial segregation of species when they share similar feeding strategies. At the regional scale, a contrasting pattern was observed where species with similar life-history traits tended to cluster together. These results indicate that critical niche dimensions may be defined at several levels of scale. Furthermore, these dimensions apparently are associated with ecological processes that can oppose one another across scale. Finally, SEM results indicate that small, short-lived opportunistic species were significantly influenced by regional patterns of streamflow variability while large, long-lived periodic species responded more strongly to variability at the smaller scale of the stream network. On the other hand, species with strategies to maximize juvenile survival (i.e. equilibrium strategists) showed negligible response to flow variability at any scale. These results presumably reflect the versatility of this strategy regarding physical habitat conditions. This research demonstrates that stream fish assemblages are structured at multiple levels of spatial scale by biotic interactions as well as characteristic responses of life-history strategies to streamflow variability.
Book Synopsis Stream Fish Community Dynamics by : William J. Matthews
Download or read book Stream Fish Community Dynamics written by William J. Matthews and published by JHU Press. This book was released on 2017-05-01 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive synthesis of stream fish community research ever produced. Winner of the CHOICE Outstanding Academic Title of the Choice ACRL Ecologists have long struggled to understand community dynamics. In this groundbreaking book, leading fish ecologists William Matthews and Edie Marsh-Matthews apply long-term studies of stream fish communities to several enduring questions. This critical synthesis reaches to the heart of ecological theory, testing concepts against the four decades of data the authors have collected from numerous warm-water stream fish communities in the central and eastern United States. Stream Fish Community Dynamics draws together the work of a single research team to provide fresh analyses of the short- and long-term dynamics of numerous streams, each with multiple sampling sites. Conducting repeated surveys of fish communities at temporal scales from months to decades, the authors' research findings will fascinate anyone searching for a deeper understanding of community ecology. The study sites covered by this book range from small headwater creeks to large prairie rivers in Oklahoma and from Ozark and Ouachita mountain streams in Arkansas to the upland Roanoke River in Virginia. The book includes • A comparison of all global and local communities with respect to community composition at the species and family level, emergent community properties, and the relationship between those emergent properties and the environments of the study sites • Analyses of traits of individual species that are important to their distribution or success in harsh environments • A review of evidence for the importance of interactions—including competition and predation—in community dynamics of stream fishes • An assessment of disturbance effects in fish community dynamics • New analysis of the short- and long-term dynamics of variation in stream fish communities, illustrating the applicability and importance of the "loose equilibrium concept" • New analyses and comparisons of spatiotemporal variation in community dynamics and beta diversity partitioning • An overview of the effects of fish in ecosystems in the central and eastern United States The book ends with a summary chapter that places the authors' findings in broader contexts and describes how the "loose equilibrium concept"—which may be the most appropriate default assumption for dynamics of stream fishes in the changing climate of the future—applies to many kinds of stream fish communities.
Book Synopsis Pond Conservation in Europe by : Beat Oertli
Download or read book Pond Conservation in Europe written by Beat Oertli and published by Springer Science & Business Media. This book was released on 2010-09-24 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ponds are an exceptional freshwater resource around the world and represent thirty percent of the global surface area of standing water. Furthermore, the millions of ponds which exist exhibit a particularly high biodiversity and have a high potential for ecosystem functions and services. Despite these impressive features, ponds face many threats from a variety of human activities and receive little or no protection under European and national legislation. Consequently, there is an urgent need to protect, consolidate and increase the pond resource in Europe. In order to achieve these objectives, the European Pond Conservation Network (EPCN) was launched 2004 in Geneva. Its aim is to promote the awareness, understanding and conservation of these small water bodies in the European landscape. This volume of “Developments in Hydrobiology” presents a selection of 31 papers presented during EPCN conferences held in 2006 in France (Toulouse) and in 2008 in Spain (Valencia). They represent a diverse collection of themes from across the continent and North Africa and present new and original insights into topics as wide ranging as pond biodiversity; human disturbance; landscape ecology; ecological assessment and monitoring; practical management measures; ecological restoration; hydrology and climate change; invasive species and threatened species.
Download or read book The Sava River written by Radmila Milačič and published by Springer. This book was released on 2014-11-05 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides a comprehensive overview of environmental aspects of the Sava River, which is the greatest tributary to the Danube River and the major drainage river system of South Eastern Europe. Hydroelectric power plants, river traffic, intensive agricultural activities, heavy industry and floods have considerable influence on the environment and biota in the basin. Summarizing the results that were gathered in the course of EU, bilateral and national projects, the book highlights the most important stressors and helps readers to better understand the impact of anthropogenic activities on the function of river basins. Topics include: transboundary water cooperation between the riparian countries; climate change projection, including its impact on flood hazards; evaluation of anthropogenic pollution sources; pollution of sediments, metal bioavailability and ecotoxicological and microbiological characterization of the river. The biological part also addresses quality aspects related to wildlife in river aquatic ecosystems (algae, macrophytes, zooplankton, macroinvertebrates and fish) and riparian ecosystems (amphibians, reptiles, birds and mammals). The general state of biodiversity and pressures caused by invasive aquatic species are also discussed.
