Sponsor
Portland State University. Environmental Sciences and Resources Ph. D. Program
First Advisor
J. Alan Yeakley
Term of Graduation
Spring 2005
Date of Publication
4-29-2005
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Environmental Science and Resources
Department
Environmental Sciences and Resources
Language
English
Subjects
Reed canary grass -- Oregon -- Portland, Floods -- Oregon -- Portland, Plant diversity -- Oregon -- Portland, Weeds -- Control -- Oregon -- Portland
DOI
10.15760/etd.5490
Physical Description
1 online resource (2, ix, 84 pages)
Abstract
Recent management efforts in the Smith and Bybee Lakes Wildlife Area (SBL), a 700-ha preserve in north Portland, Oregon, have included using a water control structure to suppress invasive reed canarygrass (Phalaris arundinacea L.) by flooding during spring and early summer growth periods. For the first year of managed flooding, I sought to determine: (a) the extent and distribution of reed canarygrass at SBL; (b) the effectiveness of the change in water level at suppressing reed canarygrass; and ( c) the effects of the change in water level on other plant species.
I established 30 vegetation transects throughout SBL before completion of the water control structure. These transects were randomly distributed, placed perpendicularly to the shorelines of the wetlands, and had a cumulative length of 3.1 km. I measured vegetation on the transects in autumn 2003 and autumn 2004 using the line intercept method at 10-cm intervals. I surveyed the transects to generate elevation profiles, accurate to 0.15 cm, to determine depth and duration of flooding, which I correlated with vegetative changes. I also monitored inundation depth, growth, and phenological response of individual stands of reed canarygrass during the 2004 growing season.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
https://archives.pdx.edu/ds/psu/20557
Recommended Citation
Jenkins, Noah John, "First Season Effects of Managed Flooding on the Invasive Species Phalaris arundinacea L. And Shoreline Vegetation Communities in an Urban Wetland" (2005). Dissertations and Theses. Paper 3606.
https://doi.org/10.15760/etd.5490
Comments
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