Grass and forbs respond differently to nitrogen addition: a meta-analysis of global grassland ecosystems.

ABSTRACT: Nitrogen (N) deposition has increased globally and has profoundly influenced the structure and function of grasslands. Previous studies have discussed how N addition affects aboveground biomass (AGB), but the effects of N addition on the AGB of different functional groups in grasslands remain unclear. We conducted a meta-analysis to identify the responses of AGB and the AGB of grasses (AGB_grass) and forbs (AGB_forb) to N addition across global grasslands. Our results showed that N addition significantly increased AGB and AGB_grass by 31 and 79%, respectively, but had no significant effect on AGB_forb. The effects of N addition on AGB and AGB_grass increased with increasing N addition rates, but which on AGB_forb decreased. Althou

SUBMITTER: You C 

PROVIDER: S-EPMC5431500 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature