Alder Canopy Dieback and Damage in Western Oregon Riparian Ecosystems Public Deposited

http://ir.library.oregonstate.edu/concern/articles/79407z91q

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Northwest Scientific Association and can be found at:  http://northwestscience.org/

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • We gathered baseline data to assess alder tree damage in western Oregon riparian ecosystems. We sought to determine if Phytophthora-type cankers found in Europe or the pathogen Phytophthora alni subsp. alni, which represent a major threat to alder forests in the Pacific Northwest, were present in the study area. Damage was evaluated in 88 transects; information was recorded on damage type (pathogen, insect or wound) and damage location. We evaluated 1445 red alder (Alnus rubra), 682 white alder (Alnus rhombifolia) and 181 thinleaf alder (Alnus incana spp. tenuifolia) trees. We tested the correlation between canopy dieback and canker symptoms because canopy dieback is an important symptom of Phytophthora disease of alder in Europe. We calculated the odds that alder canopy dieback was associated with Phytophthora-type cankers or other biotic cankers. P. alni subsp. alni (the causal agent of alder disease in Europe) was not identified in western Oregon; however, Phytophthora siskiyouensis was isolated from Phytophthora-type cankers which were present on 2% of red alder trees and 3% of white alder trees. The odds of canopy dieback were 5.4 and 4.8 times greater for red and white alder (respectively) with Phytophthora-type canker symptoms than in trees without such cankers. The percentage of trees with canopy dieback was 51%, 32%, and 10% for red, white, and thinleaf alder respectively. Other common damage included wounding, foliar pathogens and insects on red alder. This is the first report of Phytophthora canker of alder in United States forests and first report of P. siskiyouensis isolation from alder in forests anywhere.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Sims, L., Goheen, E., Kanaskie, A., & Hansen, E. (2015). Alder canopy dieback and damage in western Oregon riparian ecosystems. Northwest Science, 89(1), 34-46. doi:10.3955/046.089.0103
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2015-06-09T16:49:00Z (GMT). No. of bitstreams: 1 SimsLauraBotanyPlantPathAlderCanopyDieback.pdf: 691003 bytes, checksum: 08baefb5b61478f66d4dedb66dc80a80 (MD5) Previous issue date: 2015-01
  • description.provenance : Submitted by Patricia Black (patricia.black@oregonstate.edu) on 2015-06-09T16:48:28Z No. of bitstreams: 1 SimsLauraBotanyPlantPathAlderCanopyDieback.pdf: 691003 bytes, checksum: 08baefb5b61478f66d4dedb66dc80a80 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2015-06-09T16:49:00Z (GMT) No. of bitstreams: 1 SimsLauraBotanyPlantPathAlderCanopyDieback.pdf: 691003 bytes, checksum: 08baefb5b61478f66d4dedb66dc80a80 (MD5)

Relationships

In Administrative Set:
Last modified: 07/26/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items