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DISSOLVED ORGANIC AND INORGANIC CARBON IN PRE-RESTORATION URBAN FOREST STREAMS, CHARLOTTE, NC

In freshwater ecosystems, dissolved organic carbon records carbon sources and respiration, whereas dissolved inorganic carbon is thought to integrate groundwater inputs, mineral reactions, and microbial respiration. Land use change may influence the sources and utilization of organic carbon and DIC production. This study aims to understand DIC and DOC occurrence in tributaries of deeply incised, pre-restoration Reedy Creek (watershed area 2.5 mi2). Land uses include agriculture, residential development, pond influence, and undeveloped forest. Since 2016, surface and ground water were sampled from these sub-watersheds and the main watershed outlet (11 sites) for DIC and DOC in addition to major ions, nutrients, and stable isotopes. The agricultural watershed had the highest DOC concentration (site average 5.2 ppm in summer-fall 2016), while DOC was fairly consistent among the other land uses. DIC concentration was highest in the small developed watersheds (site averages 1.1-1.2 mM in summer-fall 2016) and lowest in the undeveloped forest stream (average 0.5 mM in summer-fall 2016).

Taylor Kiker (Primary Presenter/Author), University of North Carolina at Charlotte, tkiker@uncc.edu;


David Vinson, PhD ( Co-Presenter/Co-Author), University of North Carolina at Charlotte, dsvinson@uncc.edu;


Sandra Clinton, PhD ( Co-Presenter/Co-Author), University of North Carolina at Charlotte, sclinto1@uncc.edu;


Sara McMillan ( Co-Presenter/Co-Author), Purdue University, mcmill@purdue.edu;