Tree species richness increases ecosystem carbon storage in subtropical forests

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Xiaojuan Liu
  • Stefan Trogisch
  • Jin Sheng He
  • Pascal A. Niklaus
  • Helge Bruelheide
  • Zhiyao Tang
  • Alexandra Erfmeier
  • Michael Scherer-Lorenzen
  • Katherina A. Pietsch
  • Bo Yang
  • Peter Kühn
  • Thomas Scholten
  • Yuanyuan Huang
  • Chao Wang
  • Michael Staab
  • Katrin N. Leppert
  • Christian Wirth
  • Bernhard Schmid
  • Keping Ma

Forest ecosystems are an integral component of the global carbon cycle as they take up and release large amounts of C over short time periods (C flux) or accumulate it over longer time periods (C stock). However, there remains uncertainty about whether and in which direction C fluxes and in particular C stocks may differ between forests of high versus low species richness. Based on a comprehensive dataset derived from field-based measurements, we tested the effect of species richness (3-20 tree species) and stand age (22-116 years) on six compartments of above- and below-ground C stocks and four components of C fluxes in subtropical forests in southeast China. Across forest stands, total C stock was 149 ±12 Mg ha-1 with richness explaining 28.5% and age explaining 29.4% of variation in this measure. Species-rich stands had higher C stocks and fluxes than stands with low richness; and, in addition, old stands had higher C stocks than young ones. Overall, for each additional tree species, the total C stock increased by 6.4%. Our results provide comprehensive evidence for diversity-mediated above- and below-ground C sequestration in species-rich subtropical forests in southeast China. Therefore, afforestation policies in this region and elsewhere should consider a change from the current focus on monocultures to multi-species plantations to increase C fixation and thus slow increasing atmospheric CO2 concentrations and global warming.

OriginalspracheEnglisch
Aufsatznummer20181240
ZeitschriftProceedings of the Royal Society B: Biological Sciences
Jahrgang285
Ausgabenummer1885
Anzahl der Seiten9
ISSN0962-8452
DOIs
PublikationsstatusErschienen - 22.08.2018
Extern publiziertJa

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© 2019 The Authors.

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