Filters: Tags: North Pacific Landscape Conservation Cooperative (X) > Extensions: ArcGIS REST Service (X)
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Data represent presence/absence for cedar decline occurrence. Cedar decline refers to the dying or decline of yellow-cedar (Chamaecyparis nootkatensis) forests in Southeast Alaska and is characterized by red or yellow foliage in trees currently dying, or by white-gray snags of old mortality. Mapped snags can be standing dead as long as eighty years. The data were collected via aerial sketch mapping techniques and recorded on 1:250,000 USGS base maps from 500-3000 foot above ground level(AGL) observations. Survey coverage has been most intense for forests adjacent to shorelines and waterways. Data are collected, refined and updated on an annual basis. This data represent not one year's mortality but the cumulative...
Categories: Data;
Types: ArcGIS REST Map Service,
Map Service;
Tags: Aerial,
Alaska,
Damage,
Disease,
Forest,
These value-added, raster-based maps of forest fragmentation were produced using Coastal Change Analysis Program (C-CAP) regional land cover data. The analysis was performed using the Landscape Fragmentation Tool from the University of Connecticut’s Center for Land Use Education and Research (CLEAR). Intact forests are ecologically important but are becoming increasingly susceptible to development pressures and conversion. Forest fragmentation is the breaking up of large contiguous forest tracts into smaller, or less contiguous, areas. It is important to look at not only the net change in forest area, but also the spatial pattern of the observed changes. In these data, forest fragmentation is classified into four...
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