Ecology of the Salix and Populus species of the Crooked River National Grassland Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/tt44pr14s

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Riparian communities dominated by members of the Salicaceae (Salix lasiandra, S. lutea, S. lemmonii, Populus trichocarpa, P. tremuloides and S. exiqua) were studied at the Crooked River National Grassland in central Oregon. The objectives of this study were to examine the relationships between the Salix and Populus species and microsite to identify the principal environmental gradients that may determine the distribution of these species. One hundred twenty five stands of riparian vegetation dominated by the above members of the Salicaceae were intensively sampled. A predetermined set of physical variables were collected to characterize their habitats. These variables included surface soils, stream characteristics, vegetative characteristics, and other physiographic variables. Canonical discriminant function analysis was used to separate the Salix and Populus species based on the set of 19 environmental variables stratified according to size class (i.e. sapling, intermediate and decadent). The Salicaceae, as a family, occupy specific habitats in terms of surface soil characterisitics. The Salicaceae require surface soils which have a mean pH of 7.3, a mean macroporosity of 27.08%, a mean sand content of 53.42%, a mean organic matter content of 6.0%, a mean coarse material content of 28.59%, and a mean organic horizon of 0.58 cm. The remaining physical variables change for each species. The variables which most readily separated the species were stream gradient and average stand distance from the wetted channel. These two variables represented an environmental gradient of depth to an effective water table in relation to headwater versus valley-bottom stream systems. P. tremuloides and S. lemmonii occupy areas of steep stream gradient (headwater areas) and deep water tables (more xeric microsites). Conversely, S. lasiandra, S. lutea, S. exiqua and P. trichocarpa occupy areas of lesser stream gradient (valley bottoms) and higher water tables (more mesic microsites).
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome) using ScandAll PRO 1.8.1 on a Fi-6670 in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2013-06-11T16:35:35Z (GMT). No. of bitstreams: 1 BusseKathrynG1989.pdf: 687634 bytes, checksum: 486e92d47a291c404dd77187872de152 (MD5) Previous issue date: 1988-12-20
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-06-11T16:35:35Z (GMT) No. of bitstreams: 1 BusseKathrynG1989.pdf: 687634 bytes, checksum: 486e92d47a291c404dd77187872de152 (MD5)
  • description.provenance : Submitted by Katy Davis (kdscannerosu@gmail.com) on 2013-05-31T18:49:48Z No. of bitstreams: 1 BusseKathrynG1989.pdf: 687634 bytes, checksum: 486e92d47a291c404dd77187872de152 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-05-31T20:16:05Z (GMT) No. of bitstreams: 1 BusseKathrynG1989.pdf: 687634 bytes, checksum: 486e92d47a291c404dd77187872de152 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items