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The potential bias of nitrogen deposition effects on primary productivity and biodiversity

Citation

Ke, Yuguang et al. (2022), The potential bias of nitrogen deposition effects on primary productivity and biodiversity, Dryad, Dataset, https://doi.org/10.5061/dryad.pg4f4qrsg

Abstract

Atmospheric nitrogen (N) deposition is composed of both inorganic N (IN) and organic N (ON), and these sources of N may exhibit different impacts on ecosystems. However, our understanding of the impacts of N deposition is largely based on experimental gradients of INs or more rarely ONs. Thus, the effects of N deposition on ecosystem productivity and biodiversity may be biased. We explored the differential impacts of different IN:ON ratios on aboveground net primary productivity (ANPP) and plant species richness in a typical temperate grassland with a long-term N addition experiment. Our results showed that N addition significantly increased ANPP and reduced species richness. While the IN:ON ratios showed no different effects on ANPP, more species loss occurred with increasing IN:ON ratios. Thus, the evaluation of N deposition on biodiversity might be overestimated if only IN is added or underestimated if only ON is added.

Funding

Ministry of Science and Technology of the People's Republic of China, Award: 2017YFA0604802

National Natural Science Foundation of China, Award: 31270476