Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Siegert, Courtney
Committee Member
Varner, J Morgan
Committee Member
Alexander, Heather D.
Date of Degree
5-1-2020
Document Type
Graduate Thesis - Open Access
Major
Forestry
Degree Name
Master of Science
College
College of Forest Resources
Department
Department of Forestry
Abstract
Due largely to fire exclusion and land use changes, upland oak ecosystems in the central and eastern U.S. are shifting dominance from fire-tolerant oaks (Quercus spp.) to shade-tolerant, fire-sensitive species (mesophytes). This shift has been hypothesized to occur via a positive feedback loop termed mesophication, where mesophytes create shaded understory that limits oak growth and wetter fuels and soils, decreasing forest flammability. To determine how canopy water partitioning varies between oaks and mesophytes, I measured stemflow, throughfall, and surface soil moisture monthly over a 14-month period for overstory and midstory trees of oaks (Q. alba, Q. falcata) and hypothesized mesophytes (Carya tomentosa, Acer rubrum, Ulmus alata) in northern Mississippi. Overstory oaks partitioned 5.1% of rainwater into stemflow, while mesophytic species partitioned 7.2%, leading to 3.5% wetter soils under mesophytes. The hydrology of mesophyte canopies may reduce forest flammability and promote conditions favorable for mesophyte regeneration, ultimately compromising long-term oak regeneration.
URI
https://hdl.handle.net/11668/16959
Recommended Citation
Drotar, Natasha, "Effects of tree morphology on rainwater partitioning in an upland oak forest" (2020). Theses and Dissertations. 1816.
https://scholarsjunction.msstate.edu/td/1816