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    Data Type: Boundaries; Forest, district, and management area boundaries described by coded forest number, management area number, ranger district codes, abbreviated district identifiers and administrative and management area boundary class. This coverage has both a Polygon Attribute Table and an Arc Attribute Table with accompanying attributes.

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    During the spring months of 1976, a large scale and multi-vessel demersal trawl survey was conducted in the eastern Bering Sea. A total of 683 otter trawl samples was collected within a study area of 337,930 km 2 . This was the second for the twp baseline surveys designed to describe characteristics of Bering Sea dorsal fish and shellfish populations. The first large-scale survey had been conducted during August - October 1975. [Reference: Bakkala, R.G. and G.B. Smith. 1978. Demersal Fish Resources of the Eastern Bering Sea: Spring 1976. (Northwest Alaska Fisheries Center Processed Report; August 1978). US Dept. of Commerce 2725 Montlake Boulevard East, Seattle, WA 98112. pp. 240.]

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    Data Type: Subsistence/Traditional Knowledge; Subsistence survey data described by community codes and USGS 1:250,000 quad codes. This coverage has both a Polygon Attribute Table (PAT) and an Arc Attribute Table (AAT) with accompanying attributes.

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    A list of appendices (station and haul data, vessel intercalibration, rank order of fish, population and biomass estimates, age-length keys, length-maturity keys, etc.) for 1976 spring trawl survey. During the spring months of 1976, a large scale and multi-vessel demersal trawl survey was conducted in the eastern Bering Sea. A total of 683 otter trawl samples was collected within a study area of 337,930 km 2 . This was the second for the twp baseline surveys designed to describe characteristics of Bering Sea dorsal fish and shellfish populations. The first large-scale survey had been conducted during August - October 1975. [Reference: Bakkala, R.G. and G.B. Smith. 1978. Demersal Fish Resources of the Eastern Bering Sea: Spring 1976 (DATA APPENDICES). (Northwest Alaska Fisheries Center Processed Report; August 1978). US Dept. of Commerce 2725 Montlake Boulevard East, Seattle, WA 98112. pp. 408.]

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    The distribution and elemental composition of suspended particulate matter in Norton Sound and the northeastern Bering Sea shelf were studied in July 1979. Samples were analyzed for total suspended matter and particulate C, N, Mg, Al, Si, K, Ca, Ti, Cr, Mn, Fe, In, Cu, and Zn. The results show that the bulk of suspended material in Norton Sound consists of sedimentary material discharged from the Yukon River and re-suspended bottom sediments. The Yukon River material enters the sound from the southwest, is transported north and northeast around the perimeter of the sound, and exits from the northwest. The concentrations of the major and trace elements in the particulate matter and their elemental ratios with aluminum indicate that: K, Ca, Ti, Cr, Fe, In, and Cu are primarily associated with aluminosilicate material derived from the Yukon River and re-suspended sediments, and C and N are primarily associated with terrestrial organic material in estuarine samples and marine organic material in offshore samples. Significant enrichments of Mn and Zn, observed in the offshore samples, are attributed to Mn recycling in the sediments followed by precipitation of Mn onto particulate phases in the water column, with the Mn oxyhydroxides scavenging Zn.

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    Data Type: Boundaries; This is a composite land ownership/land status layer based primarily on the Chugach National Forest (CNF) land status GIS database and Bureau of Land Management (BLM) land records (as processed into a GIS format by Alaska Department of Natural Resources (DNR)). The CNF database includes owner, status and parcel boundaries for all lands within the CNF boundary. These parcel boundaries are based on legal descriptions, plats, and other sources drafted onto 1:31,680 scale base maps. Pacific GIS used land status records from Alaska DNR for areas outside the CNF boundary (primarily the Copper River basin). The DNR dataset is coarser in resolution (i.e., to the nearest section) than the datasets available through the Chugach NF. Alaska DNR bases their understanding of land status on a statewide digital (but non- geographic) database maintained by the BLM. In general, these records are thematically accurate but do not carry specific parcel boundaries. At a regional level of analysis, the coarse nature of this data is acceptable, but the user should recognize this limitations of this source data. Land ownership and status is dynamic, particularly in Alaska, where land is still being transferred from federal to state and Native corporation ownership, and from state to private ownership under the Alaska Statehood Act, the Alaska Native Claims Settlement Act, and various state homestead and land disposal programs. Due to the many and frequent changes in land ownership and status, Pacific GIS recommends obtaining updated information from the source agencies.

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    Data Type: Vegetation/Land Cover/Soils; Soil survey data intended to serve the needs of a broad range of users. This theme contains information useful in large-scale planning. Of primary importance are the predictions of soil behavior for selected land uses. Also highlighted are inherent limitations or hazards of the soils for land uses and the impact that selected land uses will have on the environment. Suitability ratings are given for such uses as common crops, rangeland for cattle and sheep and reindeer, commercial forestry, road locations, low buildings, recreation and off-road trafficability.

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    Data Type: Boundaries; Special administration polygons with Research Natural Areas by name, Wilderness Study Areas and Recommended Wilderness coded accordingly. Coverage RNACNF contains all the Research Natural Areas proposed for the Chugach National Forest. Coverage WILDERNESS contains the Wilderness Study Area mandated by ANILCA and the Wilderness recommended by the 1984 Plan.

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    Data Type: Boundaries; This layer includes data on protected areas in the Prince William Sound - Copper River ecosystem including Wild and Scenic Rivers, State Marine Parks, conservation lands designated under the Alaska National Interest Lands Conservation Act (ANILCA), and State of Alaska Legislatively Designated Areas (LDAs). Pacific GIS built this layer by merging data from the Alaska Department of Natural Resources (DNR), the Chugach National Forest, and the National Park Service. Land protection is a relative, rather than absolute concept; uses that would be allowed under one level of protective status (such as logging in a National Forest) would be prohibited in other types of designation (such as wilderness areas within a National Park). The protected areas layer includes sufficient information on specific designations within larger jurisdictions to allow relative ratings of protection to be developed. For additional information regarding land ownership and land status please see the documentation for the LANDOWN coverage.