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Summarization of Stream Condition and Fish Biological Potential by Ecoregion


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Uses direct output files of Aquatic Gap Analysis Program (AGAP) fish distribution models and National Fish Habitat Partnership (NFHP) 2010 Habitat Condition Indicies (HCI) to make summarized conclusions of stream condition and fish biological potential for Level 3 Ecoregions across the Conterminous United States (CONUS). Initial AGAP and NFHP products were represented at the local catchment scale of the National Hydrography Dataset Plus Version 1 (NHDPlusV1). To summarize AGAP and NFHP data into Level 3 EcoRegions a length-weighted average was used (i.e. the cumulative HCI value for each river reach within an ecoregion was weighted by the reach length with the formula (H1*L1+H2*L2...+HX*LX)/(H1+H2...+HX) where H = reach HCI score, [...]


Author :
Daniel J Wieferich, Alexa McKerrow
Cooperator/Partner :
Dana Infante

Attached Files


This BAP describes and documents a process used in the BCB national assessment efforts.


Although the data released via the U.S. Geological Survey have undergone data formatting quality review prior to posting, errors or inaccuracies may still exist in the data. Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. This disclaimer applies both to individual and aggregate uses of the data. The USGS shall not be held liable for improper or incorrect use of the data released by the Biogeographic Characterization Branch.

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