Stratigraphic and Ecophysical Characterizations of Salt Pools: Dynamic Landforms of the Webhannet Salt Marsh,Wells, ME,USA |
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| Authors: | Kristin R Wilson Joseph T Kelley Arie Croitoru Michele Dionne Daniel F Belknap Robert Steneck |
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| Institution: | (1) Program in Ecology and Environmental Science, University of Maine, Orono, ME 04469, USA;(2) Department of Earth Sciences, University of Maine, Orono, ME 04469, USA;(3) Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada, T6G 2E1;(4) Wells National Estuarine Research Reserve, 342 Laudholm Farm Rd., Wells, ME 04090, USA;(5) School of Marine Sciences, University of Maine, Darling Marine Center, 193 Clark’s Cove Rd., Walpole, ME 04573, USA |
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| Abstract: | Salt pools are water-filled depressions common to north-temperate salt marshes. In Wells, ME, USA, cores reveal a unique salt
pool signature consisting of water-saturated dark-gray mud often containing fragments of Ruppia maritima. Cores through pool sediment reenter salt marsh peat, not tidal flat sediment, demonstrating that most pools are of secondary
origin. A principal component analysis of attribute data collected from 119 pools defines three distinct pool types: those
with (1) surrounding high-marsh vegetation and thick heavily undercut banks (40% of the variance), (2) surrounding low-marsh
vegetation and thicker slightly undercut banks (18% of the variance), and (3) surrounding low-marsh vegetation and less thick
moderately undercut banks, containing R. maritima and a surficial drainage (15% of the variance). Cores and spatiotemporal analyses of aerial photographs between 1962 and
2003 reveal dramatic salt marsh surface dynamism suggesting that salt pools influence the geomorphological evolution of coastal
marshes. |
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