The effects of various environmental factors on the success of tristylous Lythrum salicaria.

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dc.contributor.author Novitski, Linda en_US
dc.date.accessioned 2007-06-14T23:18:16Z
dc.date.available 2007-06-14T23:18:16Z
dc.date.issued 2001 en_US
dc.identifier.uri http://hdl.handle.net/2027.42/54946
dc.description.abstract Invasive species can influence a community, causing a decline or even extinction of native species. Lythrum salicaria, or purple loosestrife, is an exotic, tristylous plant that spreads over disturbed wetland areas in eastern North America. Rapid proliferation of this invasive demands a thorough understanding of the conditions in which it thrives most efficiently. In this study, I examined which environmental factors cause purple loosestrife to reproduce asexually versus sexually, and which soil conditions, sandy vs. organic, and dry vs. saturated, it prefers. I also explored factors that affect herbivory. My results showed that the three morphs were distributed in the expected, 1:1:1, ratio in high invasion levels, but not in low invasion levels. Purple loosestrife was more than three times as desnse in saturated, organic soil as it was in a dry or damp, mixed soil type. There was a greater average number of inflorescences per stem in highly invaded sites, and this average increased with an increase in plant height. As the number of adults increased, the number of seedlings also increased. Nearest neighbor values indicated greater proportion of same-morph pairs than expected. At high invasion levels, the porportion of herbivory was almost triple the proportion found in low invasion sites. Also, there was a strong correlation of increasing average plant height as well as increasing soil moisture with the proportion of herbivory. Overall, successful propagation of purple loosestrife seemed greatest in saturated, organic soils and in high density populations. en_US
dc.format.extent 822428 bytes
dc.format.extent 3144 bytes
dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.subject General Ecology en_US
dc.subject.other AQUATIC en_US
dc.subject.other VASCULAR en_US
dc.subject.other PLANTS en_US
dc.subject.other EXOTIC en_US
dc.subject.other INTRODUCED en_US
dc.subject.other BREEDING en_US
dc.subject.other BIOLOGY en_US
dc.subject.other LIFE en_US
dc.subject.other HISTORY en_US
dc.subject.other HYLOBIUS en_US
dc.subject.other GALERUCELLA en_US
dc.subject.other HERBIVORY en_US
dc.title The effects of various environmental factors on the success of tristylous Lythrum salicaria. en_US
dc.subject.hlbsecondlevel Natural Resource and Environment en_US
dc.subject.hlbtoplevel Science en_US
dc.contributor.affiliationum Biological Station, University of Michigan en_US
dc.contributor.affiliationumcampus Ann Arbor en_US
dc.description.bitstreamurl http://deepblue.lib.umich.edu/bitstream/2027.42/54946/1/3387.pdf en_US
dc.description.filedescription Description of 3387.pdf : Access restricted to on-site users at the U-M Biological Station. en_US
dc.owningcollname Biological Station, University of Michigan (UMBS)
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