Using a Two-Species Individual-Based Model to Examine the Population Responses of Northern Spotted Owls to Experimental Removals of Barred Owls in the Pacific Northwest Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6969z5287

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Management goals for restoring populations of the federally-threatened northern spotted owl currently include experimental lethal removals of barred owls from demographic study areas within the overlapping ranges of the two species to examine northern spotted owl population response. As lethal removals of a bird species are time- and cost-intensive, predictive modeling of population responses is valuable for exploring potential long-term population impacts on both species and estimated recovery likelihood for northern spotted owls. I built a two-species model in the spatially-explicit, individual-based modeling framework HexSim incorporating competitive interactions and implemented lethal barred owl removals of different intensities within representative removal areas in the model landscape. Viable, long-term recovery of northern spotted owl populations was observed in two of the four modeled removal areas, and appears dependent on high removal intensities. Northern spotted owl recovery was correlated with the population growth status ofthe site-specific barred owl population at the time of removal implementation, with still-expanding barred owl populations negatively affecting northern spotted owl likelihood of recovery. This model can be further utilized to empirically parameterize barred owl population dynamics within removal areas to more accurately examine the likelihood of northern spotted owl population persistence and recovery in the long-term.
License
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2017-10-17T00:01:10Z (GMT). No. of bitstreams: 2license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5)PerlmanKathrynR2018.pdf: 2133785 bytes, checksum: 0e3c4bc7cff57748170c3d1d0d5c2e6d (MD5) Previous issue date: 2017-08-30
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2017-09-25T17:50:54Z (GMT) No. of bitstreams: 2license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5)PerlmanKathrynR2018.pdf: 2133785 bytes, checksum: 0e3c4bc7cff57748170c3d1d0d5c2e6d (MD5)
  • description.provenance : Approved for entry into archive by Margaret Mellinger(margaret.mellinger@oregonstate.edu) on 2017-10-17T00:01:10Z (GMT) No. of bitstreams: 2license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5)PerlmanKathrynR2018.pdf: 2133785 bytes, checksum: 0e3c4bc7cff57748170c3d1d0d5c2e6d (MD5)
  • description.provenance : Submitted by Kathryn Perlman (perlmank@oregonstate.edu) on 2017-09-18T23:17:18ZNo. of bitstreams: 2license_rdf: 1223 bytes, checksum: d127a3413712d6c6e962d5d436c463fc (MD5)PerlmanKathrynR2018.pdf: 2133785 bytes, checksum: 0e3c4bc7cff57748170c3d1d0d5c2e6d (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items