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ALASKA'S IMPORTANT BIRD AREAS PROGRAM
 

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The State of Alaska has a land mass of more than 365 million acres, 47,000 miles of marine shoreline, 100,000 glaciers, more than 3 million lakes and rivers, and a diversity of habitats that range from temperate rainforest to Arctic tundra. Alaska also has more than 50 million seabirds, 10 million waterfowl, and many species of breeding birds that breed nowhere else in the US or that are global endemics. Identifying IBAs in Alaska is a monumental undertaking, but a statewide IBA program is well underway.

Initially, regional projects were carried out in the Bering Sea and Cook Inlet, resulting in the identification of over 100 IBAs in Alaska.

In 2000, in cooperation with the Russian Union for Bird Conservation and the Asia Council of BirdLife International, Audubon Alaska initiated a project to identify marine and coastal IBAs on both the Alaskan and Russian sides of the Bering Sea. The initial list of proposed IBAs included more than 150 sites, although for some sites, especially on the Russian side, information was limited and dated. A technical committee composed of Russian cooperators, U.S. Fish and Wildlife Service biologists, and others reviewed the proposed sites. Of the sites identified in the U.S., 49 have been recognized as IBAs of global or continental significance (48 global, 1 continental). These sites include coastal nesting grounds for about 90% of the world population of Emperor Geese, staging areas for tens of thousands of Bar-tailed Godwits, the ice-bound, at-sea wintering area for many of the world's Spectacled Eiders, and seabird colonies and adjacent marine waters where hundreds of thousands of Crested Auklets and other Beringian endemic species nest and forage.

In October 2001, Audubon Alaska initiated a second IBA project in the Cook Inlet watershed of south-central Alaska. Based on information provided by wildlife agencies, Audubon chapters, major landowners, and others in the Cook Inlet area, a total of 24 sites were identified. The IBA National Technical Committee reviewed these sites and recognized 16 of them as IBAs of global or continental significance (12 global, 4 continental). These sites include the nesting grounds of almost the entire population of the Tule race of the Greater White-fronted Goose, tidal flats where almost the entire population of the Pribilof Island race of the Rock Sandpiper overwinters, and seabird colonies where hundreds of thousands of Common Murres nest.

In 2004, Audubon Alaska received a State Wildlife Grant from the Alaska Department of Fish & Game to support a state-wide IBA project. Building on the work already carried out in the Bering Sea and Cook Inlet regions, Audubon Alaska launched the state-wide IBA project in 2005, and, over the next few years, plans to identify and inventory IBAs across Alaska. An Alaska IBA Technical Committee was formed in April 2005, and will help to guide the process. Most of the sites in Alaska are expected to be of global and continental significance, and state-level IBAs will not be a major priority in the first round of assessment. Much of this work will involve collaboration and cooperation with a range of partnering organizations and communities across Alaska.

May 2008

 
FEATURED IMPORTANT BIRD AREA
View all Alaska IBAs
Name: Izembek-Moffet-Kinzarof Lagoons
State: US-AK
Counties: Aleutians East
Site Status: Recognized
   

Site Description:
Izembek, Moffett, and Kinzarof lagoons are marine bays located on the the Alaska Peninsula close to the southwestern tip. The lagoon and intertidal habitats are managed by the State of Alaska as Izembek State Game Refuge, while the surrounding uplands are managed by the U.S. Fish and Wildlife Service as part of Izembek National Wildlife Refuge. Izembek Lagoon was designated as a wetland of international importance under the Ramsar Convention due to its use by migratory waterbirds, particularly geese.

This IBA site is approximately 48 km long by 3-10 km wide and partially enclosed from the southwest and northeast by two long spits and a series of mostly low, sparsely vegetated barrier islands. Tidal and subtidal portions of Izembek Lagoon contain what are probably the largest eelgrass beds in the world. An estimated 60-70 % of the 218 km2 Izembek Lagoon is vegetated with eelgrass.

Ornithological Summary:
The location of Izembek Lagoon along avian migration routes and the presence of an abundant food resource (eelgrass) make this site one of the most important migratory bird staging and wintering habitats in the world. More than 82 species of birds have been documented using habitats in the vicinity of Izembek lagoon. The site is especially critical for the many species of waterfowl and shorebirds that undertake transoceanic flights to wintering habitats on the lower North Pacific coast or southern Pacific islands. The area regularly supports more than 90% of the eastern Pacific coast population of Brant, more than half the world population of Emperor Geese, and a significant percentage of the world populations of Steller's Eider and Taverner's Cackling Goose.

Shorebird habitats are diverse at this site. Extensive unvegetated mud and sand flats occur throughout the lagoons. Sand beaches run the entire length of the Bering Sea side of all barrier islands and protecting peninsulas. Twenty-eight species of shorebirds have been recorded on the area, 20 of them as migrants and 8 as breeders. The largest number of shorebirds recorded on a single-day count was 41,351 in mid October. Three species (Rock Sandpiper, Dunlin, and Western Sandpiper) account for more than 95% of all shorebirds recorded. Rock Sandpipers are the single most abundant species, with more than 32,000 present in early September, followed by Dunlins, that peak at 28,000 birds in mid October. Use by Least Sandpipers may exceed both of these figures combined, but areas favored by this species are difficult to survey.

Conservation Issues:
There is some concern about pressure from commercial guided waterfowl hunting. At present, the Izembek State Game Refuge lacks any sanctuaries where waterfowl are undisturbed. Over the longer term, there is potential for oil development in Bristol Bay, which, because of ocean circulation patterns, could threaten Izembek Lagoon. Finally, if global climate change results in increased sea levels in the Bering Sea, this could harm eelgrass beds, which could not survive even small increases in water levels.

 
   
To learn more about Alaska's
Important Bird Areas Program
Visit the web site:
Important Bird Areas of Alaska
View all Alaska IBAs
 
Contact:
Matt Kirchhoff
441 West Fifth Avenue, Suite 300
Anchorage, AK 99501
phone: (907) 276-7034
email: mkirchhoff@audubon.org
 

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