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The role of functional diversity in biotic resistance of non-native fishes and invertebrates in Lake Erie coastal wetlands

Odegard, Jenna Lynn
http://orcid.org/0000-0002-3717-1028
http://rave.ohiolink.edu/etdc/view?acc_num=osu1483612502642615

Abstract Details

2017, Master of Science, Ohio State University, Environment and Natural Resources.
Biological invasions are a leading cause of biodiversity declines and impairment of ecosystem function. Native assemblages that resist invasion by non-native species are frequently thought to be more diverse (i.e. diversity-invasibility hypothesis, DIH). This “biotic resistance” to non-natives by a more diverse assemblage of native species is thought to occur through increased interspecific competition, more fully used resources, and less available niche space. Evidence in support of the biotic resistance is mixed, suggesting that the DIH relationship depends on spatial scale (e.g. “invasion paradox”); however, another factor influencing the relationship between native and non-native species might be how diversity is measured. Most research that examines whether more diverse assemblages are more resistant to invasion has typically focused on measuring taxonomic biodiversity; however, functional diversity (e.g. feeding groups) might also be an important factor contributing to a native assemblage’s biotic resistance. In this study, I investigated if there is support for DIH in fish and invertebrate assemblages in coastal wetlands along the western basin of Lake Erie, according to taxonomic and functional richness and diversity. I sampled native and non-native fishes and invertebrates seasonally between 2013 and 2016. I expected to find a negative association between native and non-native organisms in support of DIH; however, I did not find significant within- taxonomic group relationships. In contrast, when investigating the association between fishes and non-native invertebrate presence across assemblage, I found a positive association. Explanations for these results might be related to spatial scale of the study, the possibility of abiotic factors or facilitation influencing invasion success, my approach to quantifying the biotic assemblage, time since invasion, and the statistical power. Assessing these biotic resistance trends is important for reducing costly impacts of invasion, prioritizing management efforts, and conserving native species.
Suzanne Gray, Dr. (Advisor)
Lauren Pintor, Dr. (Advisor)
Christopher Tonra, Dr. (Committee Member)
Christopher Winslow, Dr. (Committee Member)
158 p.
Environmental Science
Invasion, biotic resistance, coastal wetlands, Lake Erie, fish, invertebrates, non-native

Recommended Citations

Citations

  • Odegard, J. L. (2017). The role of functional diversity in biotic resistance of non-native fishes and invertebrates in Lake Erie coastal wetlands [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483612502642615

    APA Style (7th edition)

  • Odegard, Jenna. The role of functional diversity in biotic resistance of non-native fishes and invertebrates in Lake Erie coastal wetlands . 2017. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1483612502642615.

    MLA Style (8th edition)

  • Odegard, Jenna. "The role of functional diversity in biotic resistance of non-native fishes and invertebrates in Lake Erie coastal wetlands ." Master's thesis, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483612502642615

    Chicago Manual of Style (17th edition)

osu1483612502642615
582
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