Hydrology drives Everglades ecosystem function: implications for ecosystem vulnerability to drought, energy balance, climate teleconnections and climate change

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dc.contributor Cherry, Julia A.
dc.contributor Loescher, Henry W.
dc.contributor Ryan, Michael G.
dc.contributor.advisor Staudhammer, Christina L.
dc.contributor.advisor Starr, Gregory
dc.contributor.author Malone, Sparkle Leigh
dc.date.accessioned 2017-03-01T17:08:46Z
dc.date.available 2017-03-01T17:08:46Z
dc.date.issued 2014
dc.identifier.other u0015_0000001_0001588
dc.identifier.other Malone_alatus_0004D_11951
dc.identifier.uri https://ir.ua.edu/handle/123456789/2042
dc.description Electronic Thesis or Dissertation
dc.description.abstract Wetlands are an essential component of the terrestrial carbon pool. Hydric conditions slow decomposition and allow for soil carbon (C) accumulation and storage for long time periods. Although wetlands have large carbon sequestering potentials that could potentially serve as a negative feedback to climate change, they are threatened globally by anthropogenic pressures. In particular, water management has greatly altered the Florida Everglades, one of the largest freshwater ecosystems in the United States. To improve degraded areas of Everglades National Park (ENP), water management is being modified by the Comprehensive Everglades Restoration Plan (CERP), which seeks to re-establish water levels and hydroperiods closer to natural regimes. This study strives to understand the complex relationships between Everglades hydrology, climate, and C dynamics at different scales (plot and ecosystem) using multiple approaches (static chamber, eddy covariance, simulation modeling) and analysis techniques (linear, non-linear, and time series modeling techniques). I examined the effects of hydroperiod on the greenhouse C balance and energy balance in Everglades freshwater marsh ecosystems. I also investigated the effect of the El Niño Southern Oscillation (ENSO) and hydro-meteorological parameters on in-situ CO2 dynamics, and the potential impact of projected climate change on ecosystem CO2 exchange rates via simulation modeling using the DAYCENT model. Everglades hydrology was demonstrated to co-vary with changes in greenhouse warming potentials, energy fluxes and ENSO phase, indicating that hydrology is important for creating and maintaining conditions sufficient for wetland ecosystem structure and function. Hydroperiods are likely to change in the future with the implementation of CERP and with climate change, making it extremely important to understand the complex relationships between hydrology, climate, energy exchange and CO2, and how these relationships influence ecosystem structure and function. This research contributes to the understanding of the unique hydrology of Everglades wetland ecosystems and the complex relationships between hydrology, climate and C dynamics.
dc.format.extent 215 p.
dc.format.medium electronic
dc.format.mimetype application/pdf
dc.language English
dc.language.iso en_US
dc.publisher University of Alabama Libraries
dc.relation.ispartof The University of Alabama Electronic Theses and Dissertations
dc.relation.ispartof The University of Alabama Libraries Digital Collections
dc.relation.hasversion born digital
dc.rights All rights reserved by the author unless otherwise indicated.
dc.subject.other Ecology
dc.subject.other Environmental science
dc.title Hydrology drives Everglades ecosystem function: implications for ecosystem vulnerability to drought, energy balance, climate teleconnections and climate change
dc.type thesis
dc.type text
etdms.degree.department University of Alabama. Dept. of Biological Sciences
etdms.degree.discipline Biological Sciences
etdms.degree.grantor The University of Alabama
etdms.degree.level doctoral
etdms.degree.name Ph.D.

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