FIRST-YEAR RESPONSES TO MANAGED FLOODING OF LOWER COLUMBIA RIVER BOTTOMLAND VEGETATION DOMINATED BY PHALARIS ARUNDINACEA

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dc.contributor.authorJenkins, Noah J.
dc.contributor.authorYeakley, J. Alan
dc.contributor.authorStewart, Elaine M.
dc.date.accessioned2018-02-21T14:21:05Z
dc.date.available2018-02-21T14:21:05Z
dc.date.issued2008
dc.description.abstractManagers at Smith and Bybee Wetlands Natural Area (SBW), an 800-ha preserve in Portland, Oregon, recently installed a water control structure to suppress invasive reed canarygrass (Phalaris arundinacea L.) with spring and summer flooding. We hypothesized that greater depth of flooding would decrease Phalaris growth and percent cover. We randomly established 27 transects throughout SBW before completion of the water control structure and measured percent cover of vegetation prior to flooding in autumn 2003 and then after one growing season in autumn 2004. We also monitored phenological characteristics of individual stands of reed canarygrass growing in different depths during 2004. Overall reed canarygrass cover decreased from 43.7% in 2003 to 41.2% in 2004 (McNemar’s test; p < 0.001). Where inundation was > 0.85 m, reed canarygrass cover declined 6.1%. Where this deeper inundation coincided with regenerating willow forest, reed canarygrass cover declined 10.7%. Both before and after higher inundation, reed canarygrass cover was negatively correlated with plant species diversity (before: Spearman’s rho = −0.67, p < 0.001; after: Spearman’s rho = −0.41, p = 0.036). Cover of several native taxa (e.g., Polygonum spp., Bidens spp., Salix lucida) increased in 2004. After flooding, reed canarygrass stands grew more slowly and changed their structural growth pattern. These findings suggest that managed flooding might be operationally useful in suppressing reed canarygrass.en_US
dc.description.urihttps://link.springer.com/content/pdf/10.1672%2F06-145.1.pdfen_US
dc.format.extent10 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/M21R6N27Z
dc.identifier.citationNoah J. Jenkins, J. Alan Yeakley and Elaine M. Stewart. "First-Year Responses to Managed Flooding of Lower Columbia River Bottomland Vegetation Dominated by Phalaris Arundinacea" Wetlands Vol. 28 Iss. 4 (2008) Available at: http://works.bepress.com/j_yeakley/15/en_US
dc.identifier.urihttps://doi.org/10.1672/06-145.1
dc.identifier.urihttp://hdl.handle.net/11603/7804
dc.language.isoen_USen_US
dc.publisherSpringeren_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Geography and Environmental Systems Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item may be protected under Title 17 of the U.S. Copyright Law. It is made available by UMBC for non-commercial research and education. For permission to publish or reproduce, please contact the author.
dc.subjectecosystem managementen_US
dc.subjectinvasive speciesen_US
dc.subjectnative plant restorationen_US
dc.subjectreed canarygrassen_US
dc.subjectwetland ecologyen_US
dc.subjectwetland hydrologyen_US
dc.titleFIRST-YEAR RESPONSES TO MANAGED FLOODING OF LOWER COLUMBIA RIVER BOTTOMLAND VEGETATION DOMINATED BY PHALARIS ARUNDINACEAen_US
dc.typeTexten_US

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