Download or read book The Distribution and Abundance of Birds in the Eastern Chukchi Sea in Late Summer and Early Fall written by George J. Divoky and published by . This book was released on 1987 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Pelagic Birds and Mammals of the Chukchi Sea in Fall written by George J. Divoky and published by . This book was released on 1972 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chukchi Sea Information Update written by David A. Hale and published by . This book was released on 1987 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compendium of summaries of presentations given at meeting in Anchorage on March 27, 1986 of lease sale planning for offshore oil and gas development in the Chukchi Sea. Includes chapters on the physical oceanography, meteorology, geology, processes and potential geohazards, summertime sea ice intrusions, environmental and social impacts on the sea and on land. Also gray whale distribution in the Chukchi and Bering seas.
Download or read book Final Report written by Kathryn J. Frost and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea 2008 2012 written by Adrian E. Gall and published by . This book was released on 2013 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pelagic Distribution and Abundance of Seabirds in the Gulf of Alaska and Eastern Bering Sea written by Patrick J. Gould and published by . This book was released on 1982 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atlas based on censuses conducted from ships and aircraft over waters of the Gulf of Alaska and eastern Bering Sea.
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea 2008 2011 written by Adrian E. Gall and published by . This book was released on 2012 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notes on Birds Collected During the Summer of 1880 in Alaska and Siberia written by Tarleton Hoffman Bean and published by . This book was released on 1883 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea 2008 2013 written by and published by . This book was released on 2014 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chukchi Sea Planning Area Oil and Gas Sale 193 and the Seismic Surveying Activities in the Chukchi Sea written by and published by . This book was released on 2007 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea 2008 2010 written by Adrian E. Gall and published by . This book was released on 2011 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea 2008 2009 written by Adrian E. Gall and published by . This book was released on 2010 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Physical and Biological Oceanography on the Structure of the Seabird Community in the Northeastern Chukchi Sea written by Adrian E. Gall and published by . This book was released on 2015 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chukchi Sea is losing seasonal ice cover as global temperatures rise, facilitating human access to the region for activities such as oil and gas exploration, shipping, and tourism. Processes and responses to environmental change by marine ecosystems are often challenging to quantify because they are hidden under water. Seabirds, however, offer visible evidence of the health and status of marine ecosystems. I studied the community structure, variability in abundance and distribution, and habitat associations of seabirds in the eastern Chukchi Sea. My results provide insights into the influence of climate change on seabirds and a benchmark against which to evaluate possible impacts of anthropogenic activity. Repeated sampling of systematic transects in the northeastern Chukchi Sea during the ice-free seasons of 2008-2012 showed that the community consisted of ~40 species and was dominated numerically by planktivorous seabirds, particularly Crested Auklets (Aethia cristatella) and Short-tailed Shearwaters (Puffinus tenuirostris). In contrast, benthic-feeding birds were rare. The abundance of seabirds in the offshore northeastern Chukchi Sea varied by up to two orders of magnitude among years and birds generally were more abundant in September than August. Despite these seasonal and interannual variations in abundance, the species composition was similar among years, with anomalies occurring only in years of persistent ice cover. I compared data from this recent period (2008-2012) with data from historical surveys (1975-1981) to evaluate decadal trends in seabird abundance and composition and related those changes to reductions in seasonal ice cover. The seabird community shifted from one consisting primarily of piscivorous seabirds to one consisting primarily of planktivorous seabirds. This shift suggests that zooplankton prey are more accessible now to avian predators as seasonal ice cover has declined. I explored the relationships between seabirds, hydrography, and zooplankton abundance with spatially explicit generalized additive models. The associations of seabirds with habitat characteristics varied with foraging method and preferred prey. Species that fed primarily by pursuit diving were more abundant in warm, weakly stratified water, whereas surface-feeding species were more abundant in cold, strongly stratified water. Planktivorous seabirds (auklets, shearwaters, and phalaropes) were more abundant within 20 km of thermal surface fronts and in contrast, omnivores (gulls and murres) were more abundant far from thermal fronts. For 5 of the 8 seabird species, information about prey biomass improved predictions of seabird abundance, although the relationships were not as clear as they were for the physical habitat characteristics indicative of processes that aggregate prey. Advective processes that transport oceanic species of zooplankton from the Bering Sea to the Chukchi Sea, together with the local influence of sea ice on physical and biological processes, strongly influence the distribution of seabirds, particularly the planktivorous species. Scientists and decision-makers can use the results of this multi-species and multi-disciplinary study as a benchmark to assess the ecological consequences of anthropogenic activity against the backdrop of climate change that is affecting the Chukchi Sea.
Download or read book Distribution and Abundance of Seabirds in the Northeastern Chukchi Sea August September 2014 written by Adrian E. Gall and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution Abundance and Behavior of Endangered Whales in the Alaskan Chukchi and Western Beaufort Seas 1991 with a Review 1982 91 written by Sue E. Moore and published by . This book was released on 1992 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report written by Sue E. Moore and published by . This book was released on 1990 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Movements of Beluga Whales from the Eastern Chukchi Sea Stock During Summer and Early Autumn written by Robert Scott Suydam and published by . This book was released on 2005 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
