Download or read book Local and Landscape Effects of Past Forest Harvest on Stream Habitat and Fish Assemblages written by Nathaniel A. Hemstad and published by . This book was released on 200? with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Riparian and Catchment Forest Harvest on Stream Habitat and Fish Assemblages written by Nathaniel Andrew Hemstad and published by . This book was released on 2006 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Effects of Riparian Forest Harvest on Instream Habitat and Fish Assemblages in Northern Minnesota written by Nicholas John Schlesser and published by . This book was released on 2007 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Flathead National Forest N F Sheppard Creek Post fire Project written by and published by . This book was released on 2008 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effectiveness of Riparian Forestry Best Management Practices to Protect Stream Habitat and Biota written by Dickson Misati Atuke and published by . This book was released on 2007 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Insights on an Old Topic written by Brooke E. Penaluna and published by . This book was released on 2013 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the effects of forest harvest on streams and fish have a long history in the Pacific Northwest. Results of this work have prompted development of new forest harvest practices that are more protective of these resources, but the effectiveness of these new practices has not been fully evaluated. Furthermore, the effects of contemporary forest harvest in the context of climate change are poorly understood. To address these issues, my overall research goal was to understand how water quality, water quantity, and instream habitat influence individuals and corresponding population dynamics of coastal cutthroat trout (Oncorhynchus clarkii clarkii). My work was designed to complement field results from a new generation of watershed studies currently underway in western Oregon. I combined semi-natural experiments with modeling based on field observations to understand fundamental causes and processes influencing trout. This multifaceted approach provided a novel process-based perspective on issues related to forest harvest and climate. In Chapter 2, I evaluated individual- and population-level responses of coastal cutthroat trout to instream cover. Although the influences of forest harvest on stream flow, temperature, and turbidity are often the focus, instream cover may be strongly influenced by forest harvest. In addition, restoration of instream cover is now a common practice, but the importance of cover itself to stream-living fishes is still a major question. To address this issue, I conducted large-scale manipulative experiments in outdoor semi-natural stream units to approximate conditions experienced by trout in headwater streams in western Oregon. I determined that infrequent cover use by trout leads to emigration. Next, I built upon key ideas within stream ecology related to the importance of location within a landscape to aquatic biota, which have been explored and debated extensively. The variability in population responses across similar locations within a landscape is less understood. My objective in Chapter 3 was to understand the variability in population biomass of coastal cutthroat trout across headwater streams by understanding of the relative roles of two general classes of variables that occur in headwater streams: dynamic environmental regimes and relatively fixed habitat structure. I provided evidence that environmental regimes contribute to biomass variability while also being constrained by the habitat structure, given the range of conditions that I was able to simulate. Although the effects of contemporary forest harvest and climate change occur simultaneously, they are not typically considered together, as they are in Chapter 4. Here, I tracked population responses of trout, including biomass, survival, growth, and timing of emergence during six decades across four modeled headwater streams using the same individual-based trout model as in Chapter 3. I modeled four scenarios: 1) baseline conditions (simulation of existing conditions); 2) effects of contemporary forest harvest; 3) effects of climate change; and 4) the combined effects of forest harvest and climate change. Differences among scenarios were tied to changes in flow and temperature regimes. Here, I found that there was a high degree of local variability in the responses that I simulated. Whereas localized responses to forest harvest have been observed, my findings contrast with the vast majority of work on species responses to climate change, most of which reports relatively synchronous or uniform responses. I highlighted the role of individual variability of trout and local variability of streams, which ultimately suggest that some individuals and populations of trout may be more vulnerable than others to the effects of forest harvest, climate change, or both processes together.
Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2008 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Upland Timber Harvest and Road Construction on Headwater Stream Fish Assemblages in a Southeastern Forest written by Rex Tyrone and published by . This book was released on 2007 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Linkages in the Landscape written by Andrew F. Bennett and published by IUCN. This book was released on 2003 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: The loss and fragmentation of natural habitats is one of the major issues in wildlife management and conservation. Habitat "corridors" are sometimes proposed as an important element within a conservation strategy. Examples are given of corridors both as pathways and as habitats in their own right. Includes detailed reviews of principles relevant to the design and management of corridors, their place in regional approaches to conservation planning, and recommendations for research and management.
Download or read book Ouachita and Ozark Mountains Symposium written by and published by . This book was released on 2004 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents 5-year results of silvicultural treatments associated with ecosystem management research in the Ouachita Mountains of Arkansas. Results from stand-level treatments include regeneration dynamics of pine and hardwood species, effects of treatment on birds and small mammals, mast production, visual quality, oak decline, and organic matter. Pretreatment landscape findings include measurements of woody vegetation; birds, mammals, and herpetofauna; fish communities and trophic structure; hydrology; and evaluation of susceptibility to gypsy moth outbreaks.
Download or read book Payette National Forest N F Fall Creek Post fire Project written by and published by . This book was released on 1995 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods for Evaluating Stream Riparian and Biotic Conditions written by William S. Platts and published by . This book was released on 1982 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecosystems of California written by Harold Mooney and published by Univ of California Press. This book was released on 2016-01-19 with total page 1008 pages. Available in PDF, EPUB and Kindle. Book excerpt: This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.
Download or read book River Ecology and Management written by Robert Naiman and published by Springer Science & Business Media. This book was released on 2001-02-16 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the vast expanses of natural forests and the great populations of salmonids are harvested to support a rapidly expanding human population, the need to understand streams as ecological systems and to manage them effectively becomes increasingly urgent. The unfortunate legacy of such natural resource exploitation is well documented. For several decades the Pacific coastal ecoregion of North America has served as a natural laboratory for scientific and managerial advancements in stream ecology, and much has been learned about how to better integrate ecological processes and characteristics with a human-dominated environment. These in sightful but hard-learned ecological and social lessons are the subject of this book. Integrating land and rivers as interactive components of ecosystems and watersheds has provided the ecological sciences with impor tant theoretical foundations. Even though scientific disciplines have begun to integrate land-based processes with streams and rivers, the institutions and processes charged with managing these systems have not done so successfully. As a result, many of the watersheds of the Pacific coastal ecoregion no longer support natural settings for environmental processes or the valuable natural resources those processes create. An important role for scientists, educators, and decision makers is to make the integration between ecology and con sumptive uses more widely understood, as well as useful for effective management.
