[PDF] Multiscale Controls On Woody Riparian Vegetation eBook

Author : Daniel Allen Sarr
Publisher :
Page : 276 pages
File Size : 50,46 MB
Release : 2004
Category : Forest regeneration
ISBN :

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I studied riparian forests of four western Oregon watersheds (dry south to wet north) to determine the multiscale controls on woody riparian vegetation. I conducted separate analyses of controls on plant distribution, diversity, and tree regeneration using vegetation and environmental data collected in two related field studies: (1) a multiscale riparian forest inventory; (2) a comparative study of natural forest gaps and interiors. Climatic moisture, indexed by vapor pressure deficit in summer, was the primary correlate of compositional change between riparian sites at all scales analyzed, demonstrating that the majority of riparian species responded directly or indirectly to the landscape scale climate gradient. Additional variation in composition was explained by measures of local topography and disturbance. Climate, as indexed by modeled gross primary productivity (GPP), explained the majority of the variation in multiple regression models of plant diversity that included local and landscape scale variables. As GPP increased from dry to wet climates, understory light and moisture heterogeneity decreased, coincident with declines in alpha, beta, and hectare scale diversity, suggesting that climate controls diversity indirectly through its effects on local conditions. Tree regeneration varied sharply across the climate gradient; seedling frequency and diversity declined and nurse log use increased from the driest to wettest climates. Life history attributes of riparian tree species provided important clues to their regeneration success in different environments. These relationships were explored in a model that linked species shade and drought tolerance with expected variation in the environment caused by climate and disturbance. The model accurately predicted regeneration patterns for four of five functional groups of tree species. The studies in this dissertation provided compelling evidence of regional variation in riparian vegetation composition, diversity, and dynamics, illustrating that these communities are strongly shaped by landscape scale as well as local scale factors. Moreover, climate-related differences among riparian sites were at least as important as the local variation within them in explaining spatial vegetation patterns. These findings argue for a multiscale perspective of riparian forest ecology that closely integrates larger scale controls, such as climate, with local hydrologic processes.

Author : Darold P. Batzer
Publisher : Univ of California Press
Page : 404 pages
File Size : 15,89 MB
Release : 2012-05-22
Category : Nature
ISBN : 0520271645

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“Wetland Habitats of North America is essential reading for everyone who studies, manages, or visits North American wetlands. It fills an important void in the wetland literature, providing accessible and succinct descriptions of all of the continent’s major wetland types.” Arnold van der Valk, Iowa State University “Batzer and Baldwin have compiled the most comprehensive compendium of North American wetland habitats and their ecology that is presently available—a must for wetland scientists and managers.” Irving A. Mendelssohn, Louisiana State University "If you want to gain a broad understanding of the ecology of North America’s diverse wetlands, Wetland Habitats of North America is the book for you. Darold Batzer and Andrew Baldwin have assembled an impressive group of regional wetland scientists who have produced a virtual encyclopedia to the continent’s wetlands. Reading the book is like a road trip across the Americas with guided tours of major wetland types by local experts. Your first stop will be to coastal wetlands with eight chapters covering tidal wetlands along the Atlantic, Gulf, and Pacific coasts. Then you’ll travel inland where you can visit any or all of 18 types ranging from bottomland swamps of the Southeast to pothole marshes of the Northern Prairies to montane wetlands of the Rockies to tropical swamps of Central America and desert springs wetlands. All in one book—I’m impressed! Every wetlander should add this book to her or his swampland library. Ralph Tiner, University of Massachusetts–Amherst

Author : Robert J. Naiman
Publisher : Elsevier
Page : 445 pages
File Size : 33,88 MB
Release : 2010-08-05
Category : Science
ISBN : 0080470688

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This book describes the underlying water conditions and geologies that support viable riparia, illustrates the ecological characteristics of riparia, and discusses how riparia are used by human cultures as well as how riparia can be used to sustain environmental quality. In recent years riparian management has been widely implemented as a means of improving fisheries, water quality, and habitat for endangered species. This book provides the basic knowledge necessary to implement successful, long-term management and rehabilitation programs. Treats riparian patterns & processes in a holistic perspective, from ecological components to societal activities Contains over 130 illustrations and photos that summarize this complex ecological system Synthesizes the information from more than 6,000 professional articles Sidebars provide a look into ongoing research that is at the frontiers of riparian ecology and management

Author : Robert Naiman
Publisher : Springer Science & Business Media
Page : 734 pages
File Size : 39,51 MB
Release : 2001-02-16
Category : Science
ISBN : 9780387952468

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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.