Positive correlation between wood <i>δ</i> ¹⁵N and stream nitrate concentrations in two temperate deciduous forests.

ABSTRACT: A limitation to understanding drivers of long-term trends in terrestrial nitrogen (N) availability in forests and its subsequent influence on stream nitrate export is a general lack of integrated analyses using long-term data on terrestrial and aquatic N cycling at comparable spatial scales. Here we analyze relationships between stream nitrate concentrations and wood δ ¹⁵N records (n = 96 trees) across five neighboring headwater catchments in the Blue Ridge physiographic province and within a single catchment in the Appalachian Plateau physiographic province in the eastern United States. Climatic, acidic deposition, and forest disturbance datasets were developed to elucidate the influence of these factors on terrestrial N availability through time. We hypothesized that sp

SUBMITTER: Sabo RD 

PROVIDER: S-EPMC9610404 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature