02475nas a2200205   4500008004100000245013900041210006900180300001400249490000800263520178600271653001702057653001802074653002002092653002002112100001502132700002102147700001702168700001802185856006602203       2015                        eng d00aDissolved organic carbon concentration and flux in a grassland stream: spatial and temporal patterns and processes from long-term data0 aDissolved organic carbon concentration and flux in a grassland s  a393 - 4080 v1253 a<p>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 15.97 mg L&minus;1, with a mean of 1.19 mg L&minus;1 (standard deviation 1.01 mg L&minus;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: 0.29 kg ha&minus;1 year&minus;1; range: 0.00&ndash;9.09 kg ha&minus;1 year&minus;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.</p>10acarbon cycle10aCarbon export10along-term study10aprairie streams1 aRüegg, J.1 aEichmiller, J.J.1 aMladenov, N.1 aDodds, W., K.  uhttps://link.springer.com/article/10.1007%2Fs10533-015-0134-z00518nas a2200121   4500008004100000245008800041210006900129260004300198300001000241490001500251100002100266856010900287       2007                        eng d00aSupply, bioavailability, and source of dissolved organic carbon in a prairie stream0 aSupply bioavailability and source of dissolved organic carbon in  aManhattan, KSbKansas State University  a1 -870 v MS Thesis1 aEichmiller, J.J.  uhttp://knz.lternet.edu/content/supply-bioavailability-and-source-dissolved-organic-carbon-prairie-stream