Strong positive biodiversity-productivity relationships in a subtropical forest experiment
By
Yuanyuan Huang,
Yuxin Chen,
Nadia Castro-Izaguirre,
Martin Baruffol,
Matteo Brezzi,
Anne Lang,
Ying Li,
Werner Härdtle,
Goddert von Oheimb,
Xuefei Yang,
Kequan Pei,
Sabine Both,
Xiaojuan Liu,
Bo Yang,
David Eichenberg,
Thorsten Assmann,
Jürgen Bauhus,
Thorsten Behrens,
Francois Busçot,
Xiao-Yong Chen,
Douglas Chesters,
Bing-Yang Ding,
Walter Durka,
Alexandra Erfmeier,
Jingyun Fang,
Markus Fischer,
Liang-Dong Guo,
Dali Guo,
Jessica L.M. Gutknecht,
Jin-Sheng He,
Chun-Ling He,
Andy Hector,
Lydia Hönig,
Ren-Yong Hu,
Alexandra-Maria Klein,
Peter Kuehn,
Yu Liang,
Stefan Michalski,
Michael Scherer-Lorenzen,
Karsten Schmidt,
Thomas Scholten,
Andreas Schuldt,
Xuezheng Shi,
Man-Zhi Tan,
Zhiyao Tang,
Stefan Trogisch,
Zhengwen Wang,
Erik Welk,
Christian Wirth,
Tesfaye Wubet,
Wenhua Xiang,
Jiye Yan,
Mingjian Yu,
Xiao-Dong Yu,
Jiayong Zhang,
Shouren Zhang,
Naili Zhang,
Hong-Zhang Zhou,
Chao-Dong Zhu,
Li Zhu,
Helge Bruelheide,
Keping Ma,
Pascal A. Niklaus,
Bernhard Schmid
Posted 20 Oct 2017
bioRxiv DOI: 10.1101/206722
(published DOI: 10.1126/science.aat6405)
Forest ecosystems contribute substantially to global terrestrial primary productivity and climate regulation, but, in contrast to grasslands, experimental evidence for a positive biodiversity-productivity relationship in highly diverse forests is still lacking. Here, we provide such evidence from a large forest biodiversity experiment with a novel design in subtropical China. Productivity (stand-level tree basal area, aboveground volume and carbon and their annual increment) increased linearly with the logarithm of tree species richness. Additive partitioning showed that increasing positive complementarity effects combined with weakening negative selection effects caused a strengthening of the relationship over time. In 2-species mixed stands, complementary effects increased with functional distance and selection effects with vertical crown dissimilarity between species. Understorey shrubs reduced stand-level tree productivity, but this effect of competition was attenuated by shrub species richness, indicating that a diverse understorey may facilitate overall ecosystem functioning. Identical biodiversity-productivity relationships were found in plots of different size, suggesting that extrapolation to larger scales is possible. Our results highlight the potential of multi-species afforestation strategies to simultaneously contribute to mitigation of climate change and biodiversity restoration.
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