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As scientific understanding about ecological processes has grown, the idea that ecosystem dynamics are complex, nonlinear, and often unpredictable has gained prominence. Of particular importance is the idea that rather than following an inevitable progression toward an ultimate endpoint, some ecosystems may occur in a number of states depending on past and present ecological conditions. The emerging idea of “restoration thresholds” also enables scientists to recognize when ecological systems are likely to recover on their own and when active restoration efforts are needed. Conceptual models based on alternative stable states and restoration thresholds can help inform restoration efforts. New Models for Ecosystem Dynamics and Restoration brings together leading experts from around the world to explore how conceptual models of ecosystem dynamics can be applied to the recovery of degraded systems and how recent advances in our understanding of ecosystem and landscape dynamics can be translated into conceptual and practical frameworks for restoration. In the first part of the book, background chapters present and discuss the basic concepts and models and explore the implications of new scientific research on restoration practice. The second part considers the dynamics and restoration of different ecosystems, ranging from arid lands to grasslands, woodlands, and savannahs, to forests and wetlands, to production landscapes. A summary chapter by the editors discusses the implications of theory and practice of the ideas described in preceding chapters. New Models for Ecosystem Dynamics and Restoration aims to widen the scope and increase the application of threshold models by critiquing their application in a wide range of ecosystem types. It will also help scientists and restorationists correctly diagnose ecosystem damage, identify restoration thresholds, and develop corrective methodologies that can overcome such thresholds.
Excerpt from A Check List of Plants of the San Joaquin Experimental Range The San Joaquin Experimental Range is located near the center of the State in the granite-soil section of the Sierra Nevada foothills. It is in Madera County, 28 miles north of Fresno, California. This h6oo-acre experimental area was established in 193k as a branch station of the California Forest and Range Experiment Station, U. 8. Forest Service. Research aimed at increased production from California foothill range through improved management, fertilization, brush control, and livestock management has been carried out since establishment. The area lies in the annual grass type and is characterized by grassy rolling hills with a sparse covering of trees and occasional dense stands of brush. It is in the lower part of the woodland zone between the treeless valley floor and the higher brush and timber belts. The herbaceous ground cover consists mostly of annual grasses and forbs. In contrast, perennials dominate most western range areas. Ecologically speaking, the area is near the lower limits of the Upper Sonoran Zone. The elevation varies from 700 to 1700 feet, with most of the area lying between 1000 and 1500 feet. Exposures are generally southwesterly. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Excerpt from Annotated Bibliography of Publications From the San Joaquin Experimental Range Many problems of the annual-type ranges are related to wise and efficient use of the vegetation. Research projects con-p ducted at the San Joaquin Experimental Range have been and are designed to furnish solutions to these problems. Early range management research at the Experimental Range was directed toward determination of grazing capacity and effects of different intensities and seasons of grazing upon the condition of the range. Erosion and precipitation runoff studies were also conducted during the early years. Nursery and other seeding trials were made with annual and perennial range plants from all over the world. More recently range management re search has centered on range improved by sulfur fertilization. Conversion of brush to grass has been studied. Recommendations have been developed for crushing, burning, and spraying brush to reduce or remove plant competition and allow an increase in de sirable range herbage production. Research involving livestock has been concerned with increasing beef production through larger calf crops, improved nutrition, and reduced losses from poisonous plants, animal diseases, and other factors. This has required many studies throughout the broad field of livestock production. The abundance of wildlife in the area has prompted zo ologists to conduct intensive studies at the Experimental Range. Competition for range forage between rodents and livestock has formed the basis of some work. Various ecological relationships between species of wildlife have formed the basis of other studies. Game species such as the valley quail have been the subject of research efforts. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
This well-illustrated, comprehensive book summarizes what is known about the history, biology, and management of the California Quail. "The California Quail" is the definitive work on this beautiful bird.
"United States Department of Agriculture, Forest Service, Pacific Southwest Region"