caa a22 4500 445383674 CHVBK 20180317143025.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10021-011-9469-z doi (NATIONALLICENCE)springer-10.1007/s10021-011-9469-z Effects of Watershed History on Dissolved Organic Matter Characteristics in Headwater Streams [Elektronische Daten] [Youhei Yamashita, Brian Kloeppel, Jennifer Knoepp, Gregory Zausen, Rudolf Jaffé] Dissolved organic matter (DOM) is recognized as a major component in the global carbon cycle and is an important driver in aquatic ecosystem function. Climate, land use, and forest cover changes all impact stream DOM and alter biogeochemical cycles in terrestrial environments. We determined the temporal variation in DOM quantity and quality in headwater streams at a reference watershed (REF), a watershed clear-cut 30years ago (CC), and a watershed converted to a white pine plantation 50years ago (WP) at the US Forest Service, Coweeta Hydrologic Laboratory, in the Nantahala Mountains of western North Carolina, USA. Average stream dissolved organic carbon (DOC) concentrations in CC or WP were 60 and 80% of those in REF, respectively. Stream DOM composition showed that the difference was mainly due to changes in humic-like components in chromophoric DOM. In addition, excitation-emission matrix fluorescence data with parallel factor analysis indicate that although the concentration of protein-like components did not differ significantly among watersheds, their relative abundance showed an enrichment in CC and WP compared to REF. The ratio of humic acid-type to fulvic acid-type components was highest and lowest at REF and WP, respectively. Our data suggest that forest ecosystem disturbance history affects the DOM quantity and quality in headwater streams over decades as a result of changes in watershed soil organic matter characteristics due to differences in organic matter inputs. Springer Science+Business Media, LLC, 2011 headwater streams nationallicence dissolved organic carbon (DOC) nationallicence chromophoric dissolved organic matter (CDOM) nationallicence parallel factor analysis (PARAFAC) nationallicence watershed disturbance nationallicence Coweeta Hydrologic Laboratory nationallicence Yamashita Youhei Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, 33199, Miami, Florida, USA aut Kloeppel Brian Department of Geosciences and Natural Resources, Western Carolina University, 28723, Cullowhee, North Carolina, USA aut Knoepp Jennifer Coweeta Hydrologic Laboratory, USDA Forest Service, 28763, Otto, North Carolina, USA aut Zausen Gregory Coweeta Hydrologic Laboratory, Odum School of Ecology, University of Georgia, 28763, Otto, North Carolina, USA aut Jaffé Rudolf Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, 33199, Miami, Florida, USA aut Ecosystems Springer-Verlag 14/7(2011-11-01), 1110-1122 1432-9840 14:7<1110 2011 14 10021 https://doi.org/10.1007/s10021-011-9469-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9469-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yamashita Youhei Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, 33199, Miami, Florida, USA aut NATIONALLICENCE 700 1- Kloeppel Brian Department of Geosciences and Natural Resources, Western Carolina University, 28723, Cullowhee, North Carolina, USA aut NATIONALLICENCE 700 1- Knoepp Jennifer Coweeta Hydrologic Laboratory, USDA Forest Service, 28763, Otto, North Carolina, USA aut NATIONALLICENCE 700 1- Zausen Gregory Coweeta Hydrologic Laboratory, Odum School of Ecology, University of Georgia, 28763, Otto, North Carolina, USA aut NATIONALLICENCE 700 1- Jaffé Rudolf Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, 33199, Miami, Florida, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/7(2011-11-01), 1110-1122 1432-9840 14:7<1110 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer