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Filters: Tags: Insect (X) > Types: ArcGIS REST Map 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...
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This dataset provides a watershed index of surface drinking water importance, a watershed index of forest importance to surface drinking water, and a watershed index to highlight the extent to which development, fire, and insects and disease threaten forests important for surface drinking water. This symbology for this layer is based on the index value for insect and disease threat to forests which are important to surface drinking water on a range from 1-100.
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The Forest to Faucets dataset provides a watershed index of surface drinking water importance, a watershed index of forest importance to surface drinking water, and a watershed index to highlight the extent to which development, fire, and insects and disease threaten forests important for surface drinking water. This layer displays the percent of the HUC watershed that is threatened bu insects and disease. For further information, see the methods paper titled, "From the Forest to the Faucet: Drinking Water and Forests in the US" located at http://www.fs.fed.us/ecosystemservices/FS_Efforts/forests2faucets.shtml.
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This dataset provides a watershed index of surface drinking water importance, a watershed index of forest importance to surface drinking water, and a watershed index to highlight the extent to which development, fire, and insects and disease threaten forests important for surface drinking water.


    map background search result map search result map SE Alaska Cumulative Yellow-Cedar Decline USDA Forest to Faucets - Forest Importance to Drinking Water USDA Forest to Faucets - Index of Insect and Disease Threat to Forests Important to Surface Drinking Water USDA Forest to Faucets - Percent of HUC Threatened by Insects and Disease SE Alaska Cumulative Yellow-Cedar Decline USDA Forest to Faucets - Forest Importance to Drinking Water USDA Forest to Faucets - Index of Insect and Disease Threat to Forests Important to Surface Drinking Water USDA Forest to Faucets - Percent of HUC Threatened by Insects and Disease