Climate change and anthropogenic nitrogen deposition are both important ecological threats. Evaluating their cumulative effects provides a more holistic view of ecosystem vulnerability to human activities, which would better inform policy decisions aimed to protect the sustainability of ecosystems. Our knowledge of the cumulative effects of these stressors is growing, but we lack an integrated understanding. In this Review, we describe how climate change alters key processes in terrestrial and freshwater ecosystems related to nitrogen cycling and availability, and the response of ecosystems to nitrogen addition in terms of carbon cycling, acidification and biodiversity.
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The authors thank the participants of the Environmental Protection Agency sponsored workshop: 'Interacting Effects of Climate and Nitrogen on Ecosystems and Their Services: Workshop to Review Current Science and Inform Policy-Driven Scientific Needs' for their contributions. We also thank Meredith Lassiter and Ellen Cooter for technical comments to improve the manuscript. The views expressed in this abstract are those of the authors and do not necessarily represent the views or policies of the US EPA.
The authors declare no competing financial interests.
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Greaver, T., Clark, C., Compton, J. et al. Key ecological responses to nitrogen are altered by climate change. Nature Clim Change 6, 836–843 (2016). https://doi.org/10.1038/nclimate3088
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