caa a22 4500 605517673 CHVBK 20210128100721.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10533-015-0134-z doi (NATIONALLICENCE)springer-10.1007/s10533-015-0134-z Dissolved organic carbon concentration and flux in a grassland stream: spatial and temporal patterns and processes from long-term data [Elektronische Daten] [Janine Rüegg, Jessica Eichmiller, Natalie Mladenov, Walter Dodds] Dissolved organic carbon (DOC) in streams is a critical component of the global carbon cycle, but little is known about long-term patterns in DOC concentration and export in grassland streams. Here we present the results of a 15-year dataset collected from multiple sites in the Kings Creek watershed on Konza Prairie, KS, USA. DOC concentrations ranged from 0.15 to 15.97mgL−1, with a mean of 1.19mgL−1 (standard deviation 1.01mgL−1). Sites differed in their DOC concentrations as a function of the year of study and the season. Generally, headwaters had greater DOC concentrations, and DOC decreased downstream. The lowest concentrations were found in a groundwater spring in the watershed. Concentrations showed no trend over the study and were not correlated with discharge. However, annual export (mean: 0.29kgha−1year−1; range: 0.00-9.09kgha−1year−1) was highly correlated with annual runoff, and annual runoff explained over 80% of the variation in export. Export from Kings Creek was 30 times lower than the literature-reported mean for grasslands and 137 times less than export averaged across all biomes. Neither fire nor bison, two forces that maintain prairies, were statistically related to DOC concentrations. Main drivers of DOC concentrations are likely leaching from terrestrial organic material in soils and the accumulations in dry streambeds during drought periods as well as instream autotrophic production. Downstream declines in DOC concentrations suggest instream processing. Grassland streams probably have modest effects on the global carbon budget due to instream processing and low precipitation. Changes in precipitation may have large effects on carbon export from grassland streams. Springer International Publishing Switzerland, 2015 Prairie streams nationallicence Carbon cycle nationallicence Long-term study nationallicence Carbon export nationallicence Rüegg Janine Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut Eichmiller Jessica Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut Mladenov Natalie Department of Civil Construction and Environmental Engineering, San Diego State University, 92182, San Diego, CA, USA aut Dodds Walter Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut Biogeochemistry Springer International Publishing 125/3(2015-09-01), 393-408 0168-2563 125:3<393 2015 125 10533 https://doi.org/10.1007/s10533-015-0134-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-015-0134-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rüegg Janine Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut NATIONALLICENCE 700 1- Eichmiller Jessica Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut NATIONALLICENCE 700 1- Mladenov Natalie Department of Civil Construction and Environmental Engineering, San Diego State University, 92182, San Diego, CA, USA aut NATIONALLICENCE 700 1- Dodds Walter Division of Biology, Kansas State University, 66506, Manhattan, KS, USA aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 125/3(2015-09-01), 393-408 0168-2563 125:3<393 2015 125 10533