Reducing invasion by targeting vulnerable life stages: effects of fire on survivorship of Lespedeza cuneata

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dc.contributor.advisor Houseman, Gregory R.
dc.contributor.author Wong, Bryant M.
dc.date.accessioned 2012-06-21T16:26:18Z
dc.date.available 2012-06-21T16:26:18Z
dc.date.copyright 2011 en
dc.date.issued 2011-12
dc.identifier.other t11126
dc.identifier.uri http://hdl.handle.net/10057/5215
dc.description Thesis (M.S.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Biological Sciences. en_US
dc.description.abstract There is growing interest in whether invasive species may be controlled by targeting key life stages or by tailoring different management strategies to the specific characteristics of particular life stages. In this study, I test whether fire targeted at seed or seedling stages of sericea can increase mortality and potentially limit the spread of this invader. Two field experiments were performed manipulating the timing of fire and a laboratory experiment was conducted that quantified germination rates. The field experiments revealed that seedling survivorship varied with timing of burns and plant age, but these variables only accounted for a small amount of the variability in survivorship (R2 = 0.09, P = 0.032), suggesting that sericea seedlings quickly reach a size from which they can resprout. At the seed stage, fire greatly enhanced cumulative germination in the field burns. In contrast, the lab experiment showed that fire inflicted extremely high mortality on sericea seeds, suggesting that, in the field, seeds gain protection from fire as they mix with soil and that fire may increase germination due to enhanced resource availability. Taken together, my results illustrate that, although targeting vulnerable life stages is a sound strategy for invasive species control, careful preliminary studies may be needed to unravel complex interactions between biotic and abiotic variables before effective solutions can be devised. en_US
dc.format.extent vii, 21 p. en
dc.language.iso en_US en_US
dc.publisher Wichita State University en_US
dc.rights Copyright Bryant M. Wong, 2011. All rights reserved en
dc.subject.lcsh Electronic dissertations en
dc.title Reducing invasion by targeting vulnerable life stages: effects of fire on survivorship of Lespedeza cuneata en_US
dc.type Thesis en_US

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  • BIO Theses [38]
  • Master's Theses [980]
    This collection includes Master's theses completed at the Wichita State University Graduate School (Fall 2005 --)
  • LAS Theses and Dissertations [441]
    Theses and dissertations completed at the College of Liberal Arts and Sciences (Fall 2005 -)

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