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Book Seasonal Shorebird Use of Intertidal Habitats in Cook Inlet Alaska

Download or read book Seasonal Shorebird Use of Intertidal Habitats in Cook Inlet Alaska written by Robert E. Gill and published by . This book was released on 1999 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Abundance and Distribution of Shorebirds Using Intertidal Habitats of Izembek National Wildlife Refuge Alaska

Download or read book Abundance and Distribution of Shorebirds Using Intertidal Habitats of Izembek National Wildlife Refuge Alaska written by T. Lee Tibbitts and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerial and ground-based surveys were conducted in intertidal habitats of Izembek National Wildlife Refuge, Alaska, between July and October 1993, to assess the refuge's importance as a shorebird staging area. Surveys of less intensive nature had been conducted in winter (November 1993, February 1994) and spring (May 1994) to characterize the shorebird population in these seasons. Of the 31 species of shorebirds known to occur on the refuge in autumn, 28 were recorded. The size of the staging population is estimated to be between 78,000 and 285,000 birds. Rock sandpiper, dunlin, and western sandpiper accounted for over 95% of all birds recorded on aerial surveys. The wintering population consisted of about 9,000 individuals of two species, rock sandpiper and sanderling. These data qualify the refuge for inclusion in the Western Hemisphere Shorebird Reserve Network. Shorebird distribution varied both temporally and among species. In early autumn, the majority of shorebirds foraged on intertidal flats and roosted on sea beaches in the northeast portion of Izembek Lagoon, whereas, in late autumn most birds used intertidal flats in Moffet Lagoon. In late winter, birds were present only in ice-free areas near lagoon entrances. Rock sandpipers were more likely than dunlins to be found on Bering Sea beaches, and dunlins were more prevalent than rock sandpipers in Moffet Lagoon.

Book Cook Inlet Planning Area Oil and Gas Lease Sales 191 and 199

Download or read book Cook Inlet Planning Area Oil and Gas Lease Sales 191 and 199 written by and published by . This book was released on 2002 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Ring of Fire Resource Management Plan

Download or read book Ring of Fire Resource Management Plan written by and published by . This book was released on 2005 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book South Extension of the Coastal Trail Anchorage

Download or read book South Extension of the Coastal Trail Anchorage written by and published by . This book was released on 2006 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Outer Continental Shelf Oil and Gas Leasing Program 2012 2017

Download or read book Outer Continental Shelf Oil and Gas Leasing Program 2012 2017 written by United States. Bureau of Ocean Energy Management and published by . This book was released on 2011 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Shorebird Ecology Conservation and Management

Download or read book Shorebird Ecology Conservation and Management written by Dr. Mark A. Colwell and published by Univ of California Press. This book was released on 2010-11-16 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shorebirds are model organisms for illustrating the principles of ecology and excellent subjects for research. Their mating systems are as diverse as any avian group, their migrations push the limits of endurance, and their foraging is easily studied in the open habitats of estuaries and freshwater wetlands. This comprehensive text explores the ecology, conservation, and management of these fascinating birds. Beginning chapters examine phylogenetic relationships between shorebirds and other birds, and cover shorebird morphology, anatomy, and physiology. A section on breeding biology looks in detail at their reproductive biology. Because shorebirds spend much of their time away from breeding areas, a substantial section on non-breeding biology covers migration, foraging ecology, and social behavior. The text also covers shorebird demography, population size, and management issues related to habitat, predators, and human disturbances. Throughout, it emphasizes applying scientific knowledge to the conservation of shorebird populations, many of which are unfortunately in decline.

Book Use of Wetland Habitats by Birds in the National Petroleum Reserve Alaska

Download or read book Use of Wetland Habitats by Birds in the National Petroleum Reserve Alaska written by Dirk V. Derksen and published by . This book was released on 1981 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Distribution, abundance, and use of wetland habitats by migratory birds were studied at 2 interior and 3 outer Arctic Coastal Plain sites in the National Petroleum Reserve in Alaska in 1977 and 1978.

Book The Eastern Bering Sea Shelf

Download or read book The Eastern Bering Sea Shelf written by Donald Wilbur Hood and published by . This book was released on 1981 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seventy-three papers covering present knowledge about the natural science of the Eastern Bering Sea Shelf. Volume I deals with geological, physical and chemical oceanography; Volume II concerns biological subjects.

Book Western Birds

Download or read book Western Birds written by and published by . This book was released on 2000 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Arctic Shorebirds in North America

Download or read book Arctic Shorebirds in North America written by Jonathan Robert Bart and published by Univ of California Press. This book was released on 2012-09-01 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each year shorebirds from North and South America migrate thousands of miles to spend the summer in the Arctic. There they feed in shoreline marshes and estuaries along some of the most productive and pristine coasts anywhere. With so much available food they are able to reproduce almost explosively; and as winter approaches, they retreat south along with their offspring, to return to the Arctic the following spring. This remarkable pattern of movement and activity has been the object of intensive study by an international team of ornithologists who have spent a decade counting, surveying, and observing these shorebirds. In this important synthetic work, they address multiple questions about these migratory bird populations. How many birds occupy Arctic ecosystems each summer? How long do visiting shorebirds linger before heading south? How fecund are these birds? Where exactly do they migrate and where exactly do they return? Are their populations growing or shrinking? The results of this study are crucial for better understanding how environmental policies will influence Arctic habitats as well as the far-ranging winter habitats used by migratory shorebirds.

Book Stopover Ecology of Semipalmated Sandpipers Calidris Pusilla at Coastal Deltas of the Beaufort Sea Alaska

Download or read book Stopover Ecology of Semipalmated Sandpipers Calidris Pusilla at Coastal Deltas of the Beaufort Sea Alaska written by Roy Thomas Churchwell and published by . This book was released on 2015 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian migration is one of the wonders of the natural world. Stored fats are the main source of nutrients and fuel for avian migration and it is assumed the fat deposition at stopover sites is a critical component of a successful migration. Stopover sites are crucial in the successful migration of many birds, but particularly for arctic-breeding shorebirds that migrate long distances from breeding to wintering grounds. Despite the importance of stopover sites, it is often difficult to determine the importance of these sites to migrating shorebirds. I investigated three aspects of stopover ecology of Semipalmated Sandpipers (Calidris pusilla) foraging at coastal deltas on the Beaufort Sea coast, Alaska. First, I quantified the spatial and temporal distribution and abundance of the benthic macroinvertebrate community living within the mudflats. I found that there were two ecological groups of macroinvertebrates using river deltas, one originated in terrestrial freshwater habitats and most importantly could withstand freezing in delta sediments over the winter, and the other originated from the marine environment, could not withstand freezing and had to migrate to intertidal habitats each summer from deeper water areas that did not freeze over the winter. Stable isotope analysis allowed me to describe the origin of carbon consumed by invertebrates in intertidal habitats. I predicted freshwater invertebrates would consume terrestrial carbon, and marine invertebrates would consume marine carbon, but I found that both groups utilized the same carbon, which was a mixture of terrestrial and marine sources. My second research question determined the importance of delta foraging habitat for fall migrating Semipalmated Sandpipers. I mapped the temporal distribution and abundance of birds and quantified this relationship to invertebrate distribution and abundance. I researched fattening rates of shorebirds by measuring triglycerides in the blood of shorebirds I captured. I hypothesized that triglyceride levels would be correlated with invertebrate abundance and related to habitat quality; however, I found no relationship. Next, I determined shorebird dependence on marine invertebrates using the stable isotope signature of invertebrates and shorebird plasma. I found that shorebird abundance was associated with invertebrate abundance, and that shorebirds did feed almost exclusively on invertebrates from the mudflats later in the season. I did not find a significant difference in habitat quality among the deltas, although more birds were counted at the Jago Delta than at the other two deltas. Finally, I researched the question of how change in water levels due to lunar tides and storm surge events impacted the availability of foraging habitat. I assessed the phenology of Semipalmated Sandpiper migration and how this related to the availability of forage based on abundance, distribution, and accessibility of macroinvertebrates. There was a significant decline in the calories available for forage when there was a lunar tide and when there was a storm surge event. The most foraging habitat was available late in the migration period, while the peak in Semipalmated Sandpiper migration was early in the period. Late in the season there is also a greater chance of a storm surge event occurring due to the lack of sea ice during that period. In summary, I found Beaufort Sea deltas were more diverse than I expected both in macroinvertebrate community and in how shorebirds use the available foraging habitat. After completing this research I feel this habitat is critical to Semipalmated Sandpiper migration; however, there is a real risk of extensive change to these deltas due to future warming with negative consequences for shorebirds.