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Demography and dendrochronology of a disjunct population of eastern hemlock in Southwestern Ohio

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2018, Master of Science (MS), Wright State University, Biological Sciences.
Edge and isolated plant populations provide information about the resilience and the most basic resource needs of a species. Plant demography examines changes in population size and structure over time. An isolated, disjunct eastern hemlock population in Clifton Gorge State Nature Preserve, Yellow Springs, Ohio consists of two distinct subpopulations each with different environmental characteristics, reproductive capacities, and health ratings. Both subpopulations at Clifton Gorge were found to exhibit significant decreases in average annual ring width through time. Linear regression modeling determined that average annual growing season precipitation and temperature were the strongest predictors of these growth trends. A comparative hemlock population at Cantwell Cliffs, Rockbridge, Ohio within the contiguous range of the species displayed environmental characteristics more typical of hemlock-dominated stands and slight increases in average annual ring width through time, suggesting that the contiguous site is more favorable for eastern hemlock performance.
Don Cipollini, Ph.D. (Advisor)
Thomas Rooney, Ph.D. (Committee Member)
James Runkle, Ph.D. (Committee Member)
74 p.

Recommended Citations

Citations

  • Johnson, M. (2018). Demography and dendrochronology of a disjunct population of eastern hemlock in Southwestern Ohio [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1535073403943795

    APA Style (7th edition)

  • Johnson, Marie. Demography and dendrochronology of a disjunct population of eastern hemlock in Southwestern Ohio. 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1535073403943795.

    MLA Style (8th edition)

  • Johnson, Marie. "Demography and dendrochronology of a disjunct population of eastern hemlock in Southwestern Ohio." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1535073403943795

    Chicago Manual of Style (17th edition)