BLM REA YKL 2011 Near-Term Future (2025) Landscape Condition Status in Current Modeled Distribution of Dolly Varden in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills

Metadata Updated: November 12, 2020

The landscape condition model evaluates the degree of human impact on the landscape. Changes in land use including infrastructure, transportation, and natural resource development can result in partial or complete loss of suitable riparian habitat. Fish habitat is vulnerable to damage from current and future human modification. Human activity and disturbance such as recreation, river traffic, contaminants, and placer mining may negatively impact fish species. Placer mining throughout the YKL study area and hard rock mining in Nushagak and Kvichak watersheds just north of Iliamna could degrade Dolly Varden spawning, overwintering, and rearing habitat due to the large amounts of silt deposited in streams and the potential for direct destruction of habitat. Impacts to Dolly Varden could be much higher due to the colocation of resident populations with potential hard rock mining sites within the Lake Iliamna area. The current modeled distribution of Dolly Varden was converted to raster and landscape condition was extracted to the resulting dataset. The extracted landscape condition was then converted back to polyline. The majority of Dolly Varden habitat is currently classified as very high landscape condition. Areas of low landscape condition are localized near communities and generally associated with anthropogenic development. Future projections of landscape condition suggest that Dolly Varden habitat will remain relatively intact and in good condition. However, Dolly Varden along the potential Kuskokwim road development area are projected to go from current high quality landscape status to relatively low quality landscape status. However, overall impacts from road development are expected to be low for Dolly Varden because the species primarily occupies headwater streams whereas the road would be constructed next to higher order rivers.

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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

Additional Metadata

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 -150.430481568
Bbox North Lat 66.4169329633
Bbox South Lat 59.2597097898
Bbox West Long -161.414997122
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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