2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/22/2018 | 2:00 PM - 2:15 PM | LAND USE, RESTORATION, AND HYDROLOGICAL CONNECTIVITY OF TEMPORARY WETLANDS AND STREAMS INFLUENCE DISSOLVED ORGANIC MATTER IN DOWNSTREAM PERENNIAL WATERS | 310 B
LAND USE, RESTORATION, AND HYDROLOGICAL CONNECTIVITY OF TEMPORARY WETLANDS AND STREAMS INFLUENCE DISSOLVED ORGANIC MATTER IN DOWNSTREAM PERENNIAL WATERS
The importance of upland wetlands with temporary surface water connections to perennial waters has been debated despite the potential importance of material fluxes from wetlands. Efforts have been undertaken to restore ditched upland wetlands so they do not drain quickly but hold surface water more often. We focused on Delmarva wetlands to determine: when wetlands were connected to downstream waters and if this varied between restored, altered and natural (forested) wetlands; if DOM concentration and composition in perennial streams varied as a function of connectivity; and if there were seasonal changes in DOM microbial bioavailability.
Natural wetlands contributed surface water to perennial streams more often than restored or altered wetlands and exported more aged, aromatic-rich compounds. Seasonal inputs from the natural wetlands to perennial streams were associated with increases in DOC concentrations and shifts in composition during periods when temporary channels were flowing to perennial streams. Since natural wetlands have water in the temporary channels connecting to perennial streams more days per year than restored or agricultural wetlands we suggest natural wetlands contribute more DOM that is more aromatic to downstream waters than wetlands with altered land use or cover.
- Biogeochemistry
- Wetland
- Connectivity
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Presenters/Authors
Margaret Palmer
(), University of Maryland, mpalmer@umd.edu;
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Jacob Hosen
(), Purdue University, jhosen@purdue.edu;
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Alec Armstrong
(), University of Maryland, aarmstr1@umd.edu;
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