Title:

Environmental controls on carbon and nitrogen cycling across ecosystems in the U.S.

At a watershed scale, carbon and nitrogen cycles are often tightly coupled because nitrogen availability is a main limiting factor for carbon assimilation and retention by. Environmental conditions, like climate, stand composition and disturbances, affect both plant productivity and nitrogen usage and assimilation within the watershed, which can produce a decoupling of the two cycles that often mirror one another. However, watershed level data on both fluxes has mostly been reported for a small number of ecoregions, which could skew our understanding of how the two cycles interact. Therefore, this project aims to compare carbon and nitrogen fluxes across ecosystems in the U.S. using data from NEON and assess how variations in different environmental factors affect the two fluxes. Preliminary data analysis indicates regional differences for nitrogen inputs.

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