Trade-offs between management for fire risk reduction and northern spotted owl habitat protection in the dry conifer forests of southern Oregon Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/2227ms04b

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • There is a perceived trade-off between fire risk reduction and northern spotted owl habitat protection in dry-conifer forests in southwestern Oregon. Management options for balancing this trade-off need to be sought at the landscape level. Applied landscape ecology suggests three important features to consider are (1) patch size and configuration of fire resilient features that are used by northern spotted owls, (2) the scale at which forest structure and configuration impacts fire and northern spotted owl use, and (3) landscape memory, the influence of past ecological process on current ones. In this dissertation, I examine the landscape ecology of past and current fire regimes in the southwestern Oregon and northern California Klamath region and there implications for northern spotted owl habitat and fire risk reduction in current landscapes. Current old-forests in southwestern Oregon developed under a different fire regime than we see today. In chapter one, I review and discuss the characteristics of past fire regimes both at a fine scale, as assessed by stand-level fire history studies, and at coarse scales, as assessed by lake sediment core studies. Current landscape composition and structure represents a departure from pre-Euro-American landscapes. Forested landscapes generally have higher densities and more homogenous species composition today. In chapter two, I look specifically at edges within landscapes. Whereas past landscape edges were defined by disturbance patterns/gradients and physiographic changes, current landscapes are largely defined by ownership and management boundaries. I found no evidence of differences in surface fuel structure between two structurally and compositionally different edge-types, but I did find that edge-type impacted disturbance severity following the 2002 Timbered Rock Fire. On private industry land, salvage-logging was conducted immediately following the fire and resulted in strong edge effects into the adjacent publicly managed land that extended over 250 m from ownership boundaries. Additionally, I found that large gradients in forest age-structure on public lands reduced fire severity. In chapter three, I examine spotted owl habitat selection of fire-created edges following the 2002 Timbered Rock fire. Spotted owl use of edges varied by edge type (diffuse and hard) and spatial scale. Over moderate to large spatial scales, spotted owls selected diffuse edges, which were characterized by shallow gradients in fire severity. At fine spatial scales (<0.8 ha), there was some evidence of an association between spotted owls and hard edges, which were characterized by very steep gradients in fire severity. However, at broader spatial scales this result was reversed. I finish with overall conclusions that identify areas of common ground across these disciplines and lines and evidence, and with some management recommendations to restore more historic landscape structure that may assist with both fire risk reduction and northern spotted owl conservation.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Keyword
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Emily Comfort (comforte) on 2014-01-15T19:50:24Z No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) ComfortEmilyJ2014.pdf: 2944699 bytes, checksum: 6a4cc0caf5077e9b3a3a7562c406ab96 (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2014-01-15T21:49:39Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ComfortEmilyJ2014.pdf: 2944699 bytes, checksum: 6a4cc0caf5077e9b3a3a7562c406ab96 (MD5)
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: Hi Emily, Your ScholarsArchive@OSU submission has been rejected because you attached a CC0 or Public Domain License to your work. These licenses mean that you have "dedicated the work to the public domain by waiving all of your rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. Others can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission." We strongly suggest that you don't attach either of these licenses. We're assuming you probably meant to add a Creative Commons license to your work so that others could use it, but you intended to retain your copyrights. Please re-submit* your work and choose "Creative Commons License" from the License Type drop down box. You'll then be asked two questions about how you want people to use your work. You can also choose "No Creative Commons License". *To re-submit your work, log into ScholarsArchive@OSU. Your rejected submission will be in your Submissions & Tasks work file. You can just resume the submission. All your information will still be in the form; you need to change only the CC License page. Thanks, Julie on 2014-01-15T20:58:14Z (GMT)
  • description.provenance : Approved for entry into archive by Ruth Vondracek(ruth.vondracek@oregonstate.edu) on 2014-01-16T15:33:14Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ComfortEmilyJ2014.pdf: 2944699 bytes, checksum: 6a4cc0caf5077e9b3a3a7562c406ab96 (MD5)
  • description.provenance : Submitted by Emily Comfort (comforte) on 2014-01-15T21:47:31Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ComfortEmilyJ2014.pdf: 2944699 bytes, checksum: 6a4cc0caf5077e9b3a3a7562c406ab96 (MD5)
  • description.provenance : Made available in DSpace on 2014-01-16T15:33:14Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) ComfortEmilyJ2014.pdf: 2944699 bytes, checksum: 6a4cc0caf5077e9b3a3a7562c406ab96 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items