Download or read book Bird Habitat Relationships Along a Great Basin Elevational Gradient written by Dean E. Medin and published by . This book was released on 2000 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bird censuses were taken on 11 study plots along an elevational gradient ranging from 5,250 to 11,400 feet. Each plot represented a different vegetative type or zone: shadscale, shadscale-Wyoming big sagebrush, Wyoming big sagebrush, Wyoming big sagebrush-pinyon/juniper, pinyon/juniper, pinyon/juniper-mountain big sagebrush, mountain big sagebrush, mountain big sagebrush-mixed conifer, mixed conifer, mixed conifer-alpine, and alpine. Eighty-nine bird species were observed. The total number of birds and bird species followed a skewed bell-shaped distribution. Some birds were quite narrow in their choice of vegetative zones while others showed very little selectivity. Both total number of individual birds and bird species appeared to reach highest values in study plots with a substantial component of mountain big sagebrush.
Download or read book Bird Habitat Relationships Along a Great Basin Elevational Gradient written by Dean E. Medin and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A 20 year Recount of Bird Populations Along a Great Basin Elevational Gradient written by and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A 20 year Recount of Bird Populations Along a Great Basin Elevational Gradient written by John Woodyard and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: During 1981 and 1982, Dean E. Medin conducted bird censuses along an elevational gradient (5,250 to 11,400 feet) near and on Wheeler Peak of east-central Nevada. Twenty years later we conducted bird censuses on seven of his 12 plots. Data from the bristlecone pine--Pinus longaeva--plot were collected in 1981 but not published (data on file with the Great Basin National Park). Data for the remaining six plots were collected in 1982 and published. In general, all 2002 bird counts from the seven study plots recorded substantially fewer numbers of total birds and, with the exception of the bristlecone pine and alpine study plots, recorded fewer bird species as compared to Medin's counts of 1981 and 1982. Total numbers of birds counted in the 70 visits (10 census visits for seven study plots) to all study plots for 1981 and 1982 was 5,034. This compares to 1,930 for 2002, or a reduction of 3,104 birds--a 62 percent reduction. Total number of bird species sighted in 1981 and 1982 was 83 compared to 75 in 2002, or a reduction of eight. Sixty-three species of birds were common to the 1981/1982, and the 2002 censuses. Twenty species of birds were sighted in 1981 and 1982 that were not sighted in 2002, and 12 species were sighted in 2002 that were not recorded in 1981 and 1982.
Download or read book Research Paper RMRS written by and published by . This book was released on 1998 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A 20 year Recount of Bird Populations Along a Great Basin Elevational Gradient written by and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bird habitat Relationships Along a Vegetation Gradient in Desert Grasslands of the Southwest written by Giselle Teresa Downard and published by . This book was released on 1998 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sheep Complex Big Springs and Owyhee Grazing Allotments Sensitive Bird Species written by and published by . This book was released on 2005 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optimum Timeframes for Detecting Songbird Vocalizations in the Black Hills written by Todd R. Mills and published by . This book was released on 2000 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Birds are indicators of vegetation structure and ecological conditions. The singing activity of birds declines during late-morning periods, which can affect estimates of abundance and conclusions regarding vegetative conditions indexed by birds. Therefore, it is important to quantify periods of bird activity so biologists can plan studies. We determined hourly detections from singing males of 22 nongame bird species in ponderosa pine, quaking aspen, and grassland vegetation types in the Black Hills of South Dakota. Detections of 12 of 22 species differed among 1-hr intervals after sunrise. Detections of yellowrumped warblers, Townsend's solitaires, red-breasted nuthatches, western tanagers, and American robins decreased on count-episodes more than 4 hrs after sunrise. Detections of dusky flycatchers declined on count-episodes more than 3 hrs after sunrise and detections of black-capped chickadees were greatest during the first hour after sunrise and declined afterward. Detections of many other species from songs or calls decreased on count-episodes more than 5 hrs after sunrise. We recommend that bird counts in the Black Hills be completed within 4 hrs after sunrise so estimates of bird abundance are not affected by reduced singing among males.
Download or read book Birds of a Great Basin Sagebrush Habitat in East central Nevada written by Dean E. Medin and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pocatello Field Office Resource Management Plan written by and published by . This book was released on 2010 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bird habitat Relationships on Southeastern Forest Lands written by and published by . This book was released on 1982 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Biodiversity written by and published by Academic Press. This book was released on 2013-02-05 with total page 5485 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 7-volume Encyclopedia of Biodiversity, Second Edition maintains the reputation of the highly regarded original, presenting the most current information available in this globally crucial area of research and study. It brings together the dimensions of biodiversity and examines both the services it provides and the measures to protect it. Major themes of the work include the evolution of biodiversity, systems for classifying and defining biodiversity, ecological patterns and theories of biodiversity, and an assessment of contemporary patterns and trends in biodiversity. The science of biodiversity has become the science of our future. It is an interdisciplinary field spanning areas of both physical and life sciences. Our awareness of the loss of biodiversity has brought a long overdue appreciation of the magnitude of this loss and a determination to develop the tools to protect our future. Second edition includes over 100 new articles and 226 updated articles covering this multidisciplinary field— from evolution to habits to economics, in 7 volumes The editors of this edition are all well respected, instantly recognizable academics operating at the top of their respective fields in biodiversity research; readers can be assured that they are reading material that has been meticulously checked and reviewed by experts Approximately 1,800 figures and 350 tables complement the text, and more than 3,000 glossary entries explain key terms
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 Selected Water Resources Abstracts written by and published by . This book was released on 1988 with total page 952 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Greater Sage Grouse written by Steven T. Knick and published by Univ of California Press. This book was released on 2011-05-19 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Here's everything one needs to know about sage-grouse, but it's much more than that. From the probing analyses of sage-grouse biology, one gains a broader understanding the ecology and conservation imperatives of sagebrush habitats throughout the West."—John A. Wiens, Chief Conservation Science Officer, PRBO Conservation Science "The threats facing Sage-grouse and the sagebrush habitats of the West are as vast as the landscape itself. Anyone’s foray into confronting this monumental conservation challenge should begin in the pages of this book.”-Ben Deeble, Sagebrush-Steppe Project Leader
