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The data consist of levels of organic pollutants found in the blue mussels (Mytelus trossulus) samples from 44 sites along the Aleutian archipelago and in Cross Sound in southeast Alaska. For each site, the percent lipid, percent water and the sum of the target organic compounds are reported. The compounds are PCBs (polychlorinated biphenyls), DDTs (dichlorodiphenyltrichloroethanes), HCHs (hexachlorocyclohexanes), chlordane, and HCB (hexachlorocyclobenzene).
The data table consists of a compilation of sea otter survey results from Bering Island, Russia and select Western Aleutian Islands conducted between 1959 and 2015. The counts were reduced to sea otters per kilometer of coastline for temporal comparability. A correction factor of 3.6 was applied to aerial survey totals to yield results comparable to skiff based surveys. The data table provides the island, year, mode (aerial, skiff, or ground), and shore length covered in each survey. Counts of independent otters and pups are provided if available. Total otters counted or calculated with the correction factor and the calculated linear density are also provided.
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The data consist of counts of kelps and estimated percent cover of fleshy red algae, other benthic algal cover, and non-motile invertebrates in quadrats from over 600 nearshore rocky bottom sites that were sampled by scuba between 1987 and 2021. The sites are from 38 locations on the north Pacific Rim ranging from Bering Island, along the Aleutian Island chain and the Alaska Peninsula to southeast Alaska. At each site, divers counted kelps and estimated percent cover of other algae and encrusting invertebrates in 20 quadrats along 20-25-foot depth contour. At a subset of sites, 40-foot depths were targeted. Quadrat size is specified in the data table but was 0.25 m2 at almost all sites. At the same sites where kelps...
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This shapefile is of prospective regional outlines of where marine minerals may occur on the Alaska Outer Continental Shelf (OCS). Polygons were hand digitized based on a U.S. Geological Survey (USGS) data review that considers the state of knowledge regarding marine mineral occurrences within the Alaska OCS. This data release is a companion to the USGS Professional Paper, Gartman and others, 2022. Reference Gartman, A., Mizell, K., and Kreiner, D.C., 2022, Marine minerals in Alaska — A review of coastal and deep-ocean regions: U.S. Geological Survey Professional Paper 1870, 46 p., https://doi.org/10.3133/pp1870.
Categories: Data; Tags: Alaska Plain, Aleutian Islands, Assessments, Bering Sea, CMHRP, All tags...
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Crested (Aethia cristatella) and Least Auklets (Aethia pusilla) are crevice-nesting birds that breed in large mixed colonies at relatively few sites in the Aleutian Chain, Bering Sea, Gulf of Alaska and Sea of Okhotsk. Time-lapse imagery of nesting habitat was collected over the summers of 2010, 2012, and 2013 to assess use of the primary pre-eruption colony site. At-sea surveys collected relative abundance data to identify shifts in distributions of Crested and Least Auklets around Kasatochi and Koniuji Islands.
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This report contains the chemical and isotopic data from thermal waters and gases collected from the Aleutian Arc over the past 20 years, where such data remain unpublished or only published in part.
    map background search result map search result map Aleutian Arc geothermal fluids: chemical analyses of waters and gases (2015) Sea otter surveys from selected Western Aleutian Islands, Alaska and Bering Island, Russia between 1959-2015 Levels of Persistent Organic Pollutants Found in Blue Mussels (Mytilus trossulus) in the Aleutian Archipelago and Southeast Alaska in 1994-1996 Kelp Counts and Bottom Cover Estimates Obtained by SCUBA at Shallow Nearshore Sites along the North Pacific Rim from Bering Island to Southeast Alaska during 1987-2021 Sea otter surveys from selected Western Aleutian Islands, Alaska and Bering Island, Russia between 1959-2015 Levels of Persistent Organic Pollutants Found in Blue Mussels (Mytilus trossulus) in the Aleutian Archipelago and Southeast Alaska in 1994-1996 Kelp Counts and Bottom Cover Estimates Obtained by SCUBA at Shallow Nearshore Sites along the North Pacific Rim from Bering Island to Southeast Alaska during 1987-2021 Aleutian Arc geothermal fluids: chemical analyses of waters and gases (2015)