Tricolored blackbird - UCSB Species Distribution Model, CA Desert

Jun 20, 2013 (Last modified Jun 21, 2013)
Description:
These data are statistical model outputs for tricolored blackbird (Agelaius tricolor) species distribution, completed by Frank Davis’ Biogeography Lab at UC Santa Barbara.

The UCSB Biogeography Lab used Maxent to generate predictions of habitat occupancy for ~70 species for the CA Energy Commission’s project “Cumulative Biological Impacts Framework for Solar Energy in the CA Desert”, 500-10-021.

Species distribution models were produced at 270 m resolution using a subset of 22 environmental variables. Models were evaluated with 10-foldcross validated AUC scores. Results are preliminary and have notyet been reviewed by expert biologists.
Both continuous probability surfaces and binary layers are available for each species modeled. Binary layers depicting predicted suitable habitat were derived using the equal training sensitivity and specificity threshold.

For Agelaius tricolor (broad extent), Max Sensitivity + Specificity threshold = 0.181; best AUC =0.959; mean AUC =0.952

For Agelaius tricolor (narrow extent), Max Sensitivity + Specificity threshold = 0.26; best AUC =0.927; mean AUC =0.912

For more information on the modeling process and environmental variables used, please refer to the attached PDF file ("DATA DESCRIPTION: UCSB DRECP SPECIES DISTRIBUTION MODELS").
Data Provided By:
Frank Davis and Oliver Soong
Bren School of Environmental Science & Management
University of California
Santa Barbara, CA  93106-5131
Content date:
not specified
Citation:
Frank Davis and Oliver Soong
Bren School of Environmental Science & Management
University of California, Santa Barbara
Spatial Resolution:
270 m
Contact Organization:
Frank Davis
Bren School of Environmental Science & Management
University of California
Santa Barbara, CA  93106-5131
Lab website: www.biogeog.ucsb.edu
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Use Constraints:
Creative Commons LicenseThis work is licensed under a Creative Commons Attribution 3.0 License.
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Conservation Biology Institute

The Conservation Biology Institute (CBI) provides scientific expertise to support the conservation and recovery of biological diversity in its natural state through applied research, education, planning, and community service.