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Stable carbon isotope and wood component concentration data for riparian cottonwood tree rings, Little Missouri River, North Dakota This dataset includes stable carbon isotope values, lignin, cellulose, and hemicellulose concentrations (expressed as percent of ash-free dry mass) for riparian cottonwood (Populus deltoides) tree rings growing on the Little Missouri River floodplain, Theodore Roosevelt National Park, North Dakota. Drought stress induces stomatal closure and the carbon isotope ratio of annual tree rings tends to be negatively correlated with water availability, especially in dry environments. However, lignin and hemicellulose can obscure annual trends in carbon isotope compositions as these wood components can differ in δ13C relative to pure cellulose. We measured δ13C of whole wood in annual tree rings from seven trees with oldest... Tags: Little Missouri River, River flow reconstruction, Theodore Roosevelt National Park, USGS Science Data Catalog (SDC), biota, All tags... droughts, tree ring analysis, Fewer tags