Graduate Thesis Or Dissertation

 

Experimental reintroduction of northern wormwood (Artemisia campestris var. wormskioldii), a rare species of dynamic cobble bar environments on the Columbia River Public Deposited

Analytics

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nc580p79b

Descriptions

Attribute NameValues
Creator
Abstract
  • Rare plant reintroductions that result in additional or more viable wild populations are important conservation tools for maintaining biodiverse ecosystems. Ideally, such projects are best designed as experiments, to improve biological and ecological knowledge of the selected species and monitoring long-term results. Northern wormwood (Artemisia campestris var. wormskioldii: Asteraceae), a nearly extinct, early seral species restricted to Columbia River riparian habitat, is only known from two native populations in Washington, set 300 river kilometers apart. Both populations are declining and show minimal recruitment. In cooperation with the U.S. Fish and Wildlife Service and Army Corps of Engineers, we set up an experimental reintroduction project with the objectives of: (1) investigating the effect of environmental factors on survival of northern wormwood, to gain a better understanding of this species' habitat requirements; and (2) creating a second viable population to further recovery objectives. To achieve these goals, we obtained seeds from multiple sources in order to increase the diversity of the founding population and determine germination rates for each source. We then planted 2,100 greenhouse-grown plants on Rufus Island, Oregon, in October, 2011. We transplanted 1,450 of these in experimental plots to examine the impacts of three environmental factors: (1) substrate type; (2) distance from the water line; and (3) presence or absence of the invasive shrub false indigo (Amorpha fruticosa). The remaining plants were placed in four surplus populations in order to increase the founding population size and create a viable population. Results showed that seeds germinated at different rates across sources and years. Success of transplants was measured by survivorship and reproductive output. Transplants were most successful when planted in sand substrate and at least nine meters from the water line. The presence of false indigo, a listed invasive species, did not have a significant effect on survival of transplants. Reproductive output showed that this population produced viable seeds and recruitment was observed by way of eleven seedlings. The results from this project present new information on northern wormwood habitat requirements, as well as provide a protocol for future recovery efforts.
License
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Non-Academic Affiliation
Subject
Rights Statement
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Alexis Brickner (bricknea@onid.orst.edu) on 2013-06-21T18:17:56Z No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) BricknerAlexisH2013.pdf: 4528613 bytes, checksum: 0b21e664014f17c12b669a401b96fb8c (MD5)
  • description.provenance : Rejected by Julie Kurtz(julie.kurtz@oregonstate.edu), reason: 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. If you have any questions or concerns, please contact Sue Kunda: sue.kunda@oregonstate.edu OR 541-737-7262. on 2013-07-02T18:22:08Z (GMT)
  • description.provenance : Made available in DSpace on 2013-07-08T22:28:22Z (GMT). No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) BricknerAlexisH2013.pdf: 4528613 bytes, checksum: 0b21e664014f17c12b669a401b96fb8c (MD5) Previous issue date: 2013-06-10
  • description.provenance : Submitted by Alexis Brickner (bricknea@onid.orst.edu) on 2013-07-02T18:35:55Z No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) BricknerAlexisH2013.pdf: 4528613 bytes, checksum: 0b21e664014f17c12b669a401b96fb8c (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2013-07-02T20:06:56Z (GMT) No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) BricknerAlexisH2013.pdf: 4528613 bytes, checksum: 0b21e664014f17c12b669a401b96fb8c (MD5)
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2013-07-08T22:28:22Z (GMT) No. of bitstreams: 2 license_rdf: 1089 bytes, checksum: 0a703d871bf062c5fdc7850b1496693b (MD5) BricknerAlexisH2013.pdf: 4528613 bytes, checksum: 0b21e664014f17c12b669a401b96fb8c (MD5)

Relationships

Parents:

This work has no parents.

In Collection:

Items

Thumbnail Title Date Uploaded Visibility Actions
BricknerAlexisH2013.pdf 2017-08-04 Public