Experimental evidence shows minor contribution of nitrogen deposition to global forest carbon sequestration.

ABSTRACT: Human activities have drastically increased nitrogen (N) deposition onto forests globally. This may have alleviated N limitation and thus stimulated productivity and carbon (C) sequestration in aboveground woody biomass (AGWB), a stable C pool with long turnover times. This 'carbon bonus' of human N use partly offsets the climate impact of human-induced N₂ O emissions, but its magnitude and spatial variation are uncertain. Here we used a meta-regression approach to identify sources of heterogeneity in tree biomass C-N response (additional C stored per unit of N) based on data from fertilization experiments in global forests. We identified important drivers of spatial variation in forest biomass C-N response related to climate (potential evapotranspiration), soil fertility (N con

SUBMITTER: Schulte-Uebbing LF 

PROVIDER: S-EPMC9299138 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature