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3286860 
Journal Article 
Nitrogen enrichment weakens ecosystem stability through decreased species asynchrony and population stability in a temperate grassland 
Zhang, Y; Loreau, M; Lu, X; He, N; Zhang, G; Han, X 
2016 
Yes 
Global Change Biology
ISSN: 1354-1013
EISSN: 1365-2486 
22 
4 
1445-1455 
English 
26511538 
WOS:000371515300011 
Biodiversity generally promotes ecosystem stability. To assess whether the diversity-stability relationship observed under ambient nitrogen (N) conditions still holds under N enriched conditions, we designed a 6-year field experiment to test whether the magnitude and frequency of N enrichment affects ecosystem stability and its relationship with species diversity in a temperate grassland. Results of this experiment showed that the frequency of N addition had no effect on either the temporal stability of ecosystem and population or the relationship between diversity and stability. Nitrogen addition decreased ecosystem stability significantly through decreases in species asynchrony and population stability. Species richness was positively associated with ecosystem stability, but no significant relationship between diversity and the residuals of ecosystem stability was detected after controlling for the effects of the magnitude of N addition, suggesting collinearity between the effects of N addition and species richness on ecosystem stability, with the former prevailing over the latter. Both population stability and the residuals of population stability after controlling for the effects of the magnitude of N addition were positively associated with ecosystem stability, indicating that the stabilizing effects of component populations were still present after N enrichment. Our study supports the theory predicting that the effects of environmental factors on ecosystem functioning are stronger than those of biodiversity. Understanding such mechanisms is important and urgent to protect biodiversity in mediating ecosystem functioning and services in the face of global changes. 
asynchrony; biodiversity; community stability; complementarity; insurance hypothesis; nitrogen addition frequency; nitrogen deposition; portfolio effect; species stability 
NAAQS
• ISA NOxSOxPM Ecology (2018)
     Cited in the Second Draft
          Appendix 6
• ISA NOxSOxPM Ecology (2020- Final Project Page)
     Cited
          Appendix 6