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One of the most important hotspots of herpetological biodiversity in the United States, California is home to many endemic amphibians and reptiles found nowhere else on earth. Many of these taxa have unique ecological and morphological specializations, and their management is an important conservation challenge. Increasing climate change impacts, human development, and extreme drought mean many of these species face an ever-greater risk of extinction. California Amphibian and Reptile Species of Special Concern provides an up-to-date synthesis of the current state of knowledge regarding the biology and conservation risks faced by 45 of California’s most sensitive amphibian and reptile species. With the goal of enhancing management based on the best available science, the authors developed a novel set of risk metrics to identify special concern species and the threats they face, including population declines, range size and restrictions, and ecological specializations and niche restrictions. In addition to detailed species accounts, this book provides a quantitative analysis of the conservation status and pressing management issues facing individual species and the state’s amphibian and reptile fauna as a whole. The volume focuses on identifying threats, concrete recommendations for management and recovery, and future research needs. The text is complemented by detailed distribution maps, color photos, and graphs. Written in nontechnical language, California Amphibian and Reptile Species of Special Concern will be a valuable resource to a broad range of users from resource managers, field biologists, and academic herpetologists to students and recreational naturalists. Published in association with the California Department of Fish and Wildlife.
The book describes results of 20 years of study of the ecology and management of Sacramento's bridge-nesting Purple Martin population. This is the last population of this California Species of Special Concern that remains in the state's Central Valley. Contents include population status, habitat requirements, and evaluation of management actions taken on behalf of the species. Various factors that could be responsible for the dramatic 88% population decline are evaluated in detail. A population model uses information on population size and survival estimates from banding studies to identify the cause of decline as inadequate reproduction, which is tied to the dramatic increase in use of neonicotinoid insecticides in surrounding urban and agricultural lands. The document identifies needed conservation measures and detailed land use planning guidelines for planning, design, environmental analysis, and construction to prevent disturbance of nesting martins and degradation of their habitat by urban development projects. The book also includes a number of accessible and entertaining sidebar explorations on how this long-term research project was conducted, how Western Purple Martins differ from their more abundance eastern counterparts, why martins are nest in colonies, and other topics of general reader interest.
One of California's most remarkable wetlands, Suisun Marsh is the largest tidal marsh on the West Coast and a major feature of the San Francisco Estuary. This productive and unique habitat supports endemic species, is a nursery for native fishes, and is a vital link for migratory waterfowl. The 6,000-year-old marsh has been affected by human activity, and humans will continue to have significant impacts on the marsh as the sea level rises and cultural values shift in the century ahead. This study includes in-depth information about the ecological and human history of Suisun Marsh, its abiotic and biotic characteristics, agents of ecological change, and alternative futures facing this ecosystem.
This beautifully illustrated and user-friendly book presents the most up-to-date information available about the natural histories of birds of the Sierra Nevada, the origins of their names, the habitats they prefer, how they communicate and interact with one another, their relative abundance, and where they occur within the region. Each species account features original illustrations by Keith Hansen. In addition to characterizing individual species, Birds of the Sierra Nevada also describes ecological zones and bird habitats, recent trends in populations and ranges, conservation efforts, and more than 160 rare species. It also includes a glossary of terms, detailed maps, and an extensive bibliography with over 500 citations.
The status of the rich avifauna of western North America is ever changing in response to human influences, geomorphic processes, and natural climatic variation. Documenting and synthesizing the patterns, rate, and causes of these changes is crucial for the conservation of birds in this region, particularly in a time of rapid climate change, expanding human population, and accelerated resource extraction. To that end, a symposium on avifaunal change was held at Western Field Ornithologists' annual conference in San Diego, California, in October 2014, which formed the basis for the current volume. The papers herein emphasize the overarching themes of the effects of extensive habitat loss and degradation on the avifauna of the West in the 19th and 20th centuries and the responses of birds to environmental change and variation. Several papers portray rays of hope, documenting reversals of trends in the loss of some important habitats, the recovery of some avian populations in response to management, and resiliency in other species as they adapt to novel habitats. Others express increasing concern for the potential future effects of a rapidly changing climate. Most emphasize the importance of long-term monitoring of the population trends, distribution, and ecological attributes of the region's birdlife. The geographical representation and bird species or groups covered varies widely. Collectively these papers should aid in the long-term conservation of the region's birdlife.--