BLM REA YKL 2011 Near-Term Future (2025) Cumulative Impacts in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills

Metadata Updated: November 12, 2020

Some of the YKL rasters intentionally do not align or have the same extent. These rasters were not snapped to a common raster per the authors' discretion. Please review selected rasters prior to use. These varying alignments are a result of the use of differing source data sets and all products derived from them. We recommend that users snap or align rasters as best suits their own projects. - To provide a more comprehensive measure of potential impacts to the ecoregions, we summarize all the potential impacts to Conservation Elements (CEs) generalized to the 5th-level hydrologic units under what we call the Cumulative Impacts assessment. The measurement of cumulative impacts has become increasingly emphasized both in the academic literature and in regulatory requirements. Essentially, the cumulative impacts present a summary dataset of all potential threats to the landscape to identify the locations within the study area that are likely to experience the greatest amount of change. The inverse of this dataset could be seen as a landscape vulnerability index (LVI) that could be used to assist in future resource planning efforts. The Cumulative Impacts analysis summarized the number of significantly changing variables for all Change Agents. However, in order to sum the impacts, we had to define meaningful changes in the CAs. Given that the Cumulative Impacts analysis is not targeted on any one CE, we defined these thresholds individually based on perceived magnitude. This analysis is intended to identify the level of change in the study area in 2025. When taken together, the cumulative impacts identify some key areas where change to the landscape is likely to be the greatest. In the near-term future, there are only a few watersheds where three to four CAs are likely to cumulatively and significantly impact the environment. They are located along the Yukon River and near the town of Galena. The majority of the study area is only expected to see one to two CAs changing significantly in the near-term future. However, in the long-term future, more numerous significantly changing variables are expected. Again, most of the CAs seem to be changing along the Yukon River and near Galena, but there are multiple watersheds near Manley Hot Springs that are also likely to experience up to all seven CA variables changing significantly. Equally important is the observation that no region is forecasted to have less than three CA variables change in the long-term future.

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Metadata Date December 20, 2017
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) June 10, 2014 (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from DOI Open Data

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Resource Type Dataset
Metadata Date December 20, 2017
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Reference Date(s) June 10, 2014 (publication)
Responsible Party Alaska Natural Heritage Program, University of Alaska Anchorage (Point of Contact)
Contact Email
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Bbox East Long -150.162153
Bbox North Lat 66.456536
Bbox South Lat 59.068723
Bbox West Long -162.555881
Coupled Resource
Frequency Of Update notPlanned
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Metadata Language
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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