BLM REA YKL 2011 Current (2013) distribution of northern pike habitat in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills

Metadata Updated: November 12, 2020

Northern pike (Esox lucius) are a strictly freshwater fish that live in, migrate through, feed in, and spawn in the Yukon River Lowlands - Kuskokwim Mountains - Lime Hills. This dataset provides the modeled current (2013) spatial distribution of northern pike within the REA study area for the analysis of northern pike as an Aquatic Fine-Filter Conservation Element. This dataset was produced by calculating 14 predictor variables in ArcGIS based on presence and absence data from the Alaska Freshwater Fish Inventory (AFFI) dataset and telemetry data for northern pike in the Kuskokwim drainage. The Alaska Freshwater Fish Inventory is developed and maintained by the Alaska Department of Fish and Game and contains the occurrence datasets from fish and aquatic habitat inventories. Predictor variables were as follows: elevation, permafrost, gradient, floodplain (presence or absence), slope over area ratio, stream order, watershed area, average watershed annual precipitation, average watershed annual temperature, average watershed elevation, average watershed slope over area ratio, average watershed slope, percent permafrost cover in watershed, and percent lake cover in watershed. Subsequently, the 14 calculated predictor variables provided the input data for the Random Forests model to generate an output raster of northern pike distribution. The raster data was post-processed in ArcGIS to clip and thin the results. A subset of the AFFI data was withheld from the calculation of predictor variables and was used to determine the predictive accuracy of the generated model. The variable importance plots indicated that the most important predictors for northern pike were watershed area, stream order, stream elevation, lake density, and floodplains. Northern pike were predicted in stream reaches with connected floodplains that had larger watersheds, higher stream order, lower elevation, and higher lake density than stream reaches without northern pike. The model predictions in GIS resulted in approximately 10,900 km of potential habitat for northern pike in the YKL REA study area.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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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 -150.462711588
Bbox North Lat 66.2465875482
Bbox South Lat 59.3232140247
Bbox West Long -161.219996421
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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