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A meta-analysis of 1,119 manipulative experiments on terrestrial carbon-cycling responses to global change

Song, J, Wan, S, Piao, S, Knapp, AK, Classen, AT, Vicca, S, Ciais, P, Hovenden, MJ ORCID: 0000-0001-7208-9700, Leuzinger, S, Beier, C, Kardol, P, Xia, J, Liu, Q, Ru, J, Zhou, Zhenxing, Luo, Y, Guo, D, Langley, JA, Zscheischler, J, Dukes, JS, Tang, J, Chen, J, Hofmockel, KS, Kueppers, LM, Rustad, L, Liu, L, Smith, MD, Templer, PH, Thomas, RQ, Norby, RJ, Phillips, RP, Niu, S, Fatichi, S, Wang, Y, Shao, P, Han, H ORCID: 0000-0002-7369-5187, Wang, D, Lei, L, Wang, J, Li, X, Zhang, Q, Li, X, Su, F, Liu, B, Yang, F, Ma, G, Li, G, Liu, Y, Liu, Y, Yang, Z, Zhang, K, Miao, Y, Hu, M, Yan, C, Zhang, A, Zhong, M, Hui, Y, Li, Y and Zheng, M 2019 , 'A meta-analysis of 1,119 manipulative experiments on terrestrial carbon-cycling responses to global change' , Nature Ecology & Evolution , pp. 1-14 , doi:

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Direct quantification of terrestrial biosphere responses to global change is crucial for projections of future climate change in Earth system models. Here, we synthesized ecosystem carbon-cycling data from 1,119 experiments performed over the past four decades concerning changes in temperature, precipitation, CO2 and nitrogen across major terrestrial vegetation types of the world. Most experiments manipulated single rather than multiple global change drivers in temperate ecosystems of the USA, Europe and China. The magnitudes of warming and elevated CO2 treatments were consistent with the ranges of future projections, whereas those of precipitation changes and nitrogen inputs often exceeded the projected ranges. Increases in global change drivers consistently accelerated, but decreased precipitation slowed down carbon-cycle processes. Nonlinear (including synergistic and antagonistic) effects among global change drivers were rare. Belowground carbon allocation responded negatively to increased precipitation and nitrogen addition and positively to decreased precipitation and elevated CO2. The sensitivities of carbon variables to multiple global change drivers depended on the background climate and ecosystem condition, suggesting that Earth system models should be evaluated using site-specific conditions for best uses of this large dataset. Together, this synthesis underscores an urgent need to explore the interactions among multiple global change drivers in underrepresented regions such as semi-arid ecosystems, forests in the tropics and subtropics, and Arctic tundra when forecasting future terrestrial carbon-climate feedback.

Item Type: Article
Authors/Creators:Song, J and Wan, S and Piao, S and Knapp, AK and Classen, AT and Vicca, S and Ciais, P and Hovenden, MJ and Leuzinger, S and Beier, C and Kardol, P and Xia, J and Liu, Q and Ru, J and Zhou, Zhenxing and Luo, Y and Guo, D and Langley, JA and Zscheischler, J and Dukes, JS and Tang, J and Chen, J and Hofmockel, KS and Kueppers, LM and Rustad, L and Liu, L and Smith, MD and Templer, PH and Thomas, RQ and Norby, RJ and Phillips, RP and Niu, S and Fatichi, S and Wang, Y and Shao, P and Han, H and Wang, D and Lei, L and Wang, J and Li, X and Zhang, Q and Li, X and Su, F and Liu, B and Yang, F and Ma, G and Li, G and Liu, Y and Liu, Y and Yang, Z and Zhang, K and Miao, Y and Hu, M and Yan, C and Zhang, A and Zhong, M and Hui, Y and Li, Y and Zheng, M
Keywords: climate-change ecology, ecosystem ecology
Journal or Publication Title: Nature Ecology & Evolution
Publisher: Nature Publishing Group
ISSN: 2397-334X
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Copyright 2019 The Author(s), under exclusive licence to Springer Nature Limited

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