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Determining and Comparing Hydraulic Behavior among Trees with Differing Wood Types in a Temperate Deciduous Forest

Bryant, Kelsey N.
http://orcid.org/0000-0003-3443-0466
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617026904705736

Abstract Details

2021, Doctor of Philosophy (PhD), Ohio University, Plant Biology (Arts and Sciences).
Carbon-mediated hydraulic failure is the current leading hypothesis for natural tree mortality. However, the physiological mechanisms of this process vary among species and environment. The way in which a tree responds to drought is defined as its hydraulic behavior, which is described using the isohydric/anisohydric continuum. Theoretically, diffuse-porous and ring-porous trees should fall at opposite ends of this continuum due to their contrasting xylem anatomy and associated carbon requirements. While previous studies have documented this trend, the relationship between wood type and hydraulic behavior is still unresolved, particularly in temperate forests. The overall goal of my research was to describe hydraulic behavior in ring- and diffuse-porous species in a temperate, deciduous forest. I included small and mature trees to understand the influence of size class on hydraulic behavior. My results indicate a distinct dichotomy between isohydric, diffuse-porous Acer saccharum and anisohydric, ring-porous Carya ovata; however, other species exemplify a spectrum of hydraulic behaviors, falling along a gradient between wood types. This pattern was consistent among size classes, validating comparisons of hydraulic behavior between small saplings and mature trees. Overall, this work provides new insights into the physiological mechanisms responsible for carbon-water trade-offs in ring- and diffuse-porous trees in temperate forests.
David Rosenthal (Advisor)
Brian McCarthy (Committee Member)
Rebecca Snell (Committee Member)
James Dyer (Committee Chair)
134 p.
Climate Change; Ecology; Environmental Science; Forestry; Physiology; Plant Sciences; Wood
Tree physiology; Xylem anatomy; Ring-porous; Diffuse-porous; Sap flux; Hydraulic behavior; Isohydric continuum; Tree size; Temperate forests; Deciduous forests; Vapor pressure deficit; Leaf water potential; Mature trees; Canopy trees

Recommended Citations

Citations

  • Bryant, K. N. (2021). Determining and Comparing Hydraulic Behavior among Trees with Differing Wood Types in a Temperate Deciduous Forest [Doctoral dissertation, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617026904705736

    APA Style (7th edition)

  • Bryant, Kelsey. Determining and Comparing Hydraulic Behavior among Trees with Differing Wood Types in a Temperate Deciduous Forest. 2021. Ohio University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617026904705736.

    MLA Style (8th edition)

  • Bryant, Kelsey. "Determining and Comparing Hydraulic Behavior among Trees with Differing Wood Types in a Temperate Deciduous Forest." Doctoral dissertation, Ohio University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617026904705736

    Chicago Manual of Style (17th edition)

ohiou1617026904705736
171
© 2021, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.