Systematic distributions of interaction strengths across tree interaction networks yield positive diversity–productivity relationships

Research output: Journal contributionsComments / Debate / ReportsResearch

Authors

  • Wentao Yu
  • Georg Albert
  • Benjamin Rosenbaum
  • Florian Schnabel
  • Helge Bruelheide
  • John Connolly
  • Werner Härdtle
  • Goddert von Oheimb
  • Stefan Trogisch
  • Nadja Rüger
  • Ulrich Brose

Understanding the mechanisms underlying diversity–productivity relationships (DPRs) is crucial to mitigating the effects of forest biodiversity loss. Tree–tree interactions in diverse communities are fundamental in driving growth rates, potentially shaping the emergent DPRs, yet remain poorly explored. Here, using data from a large-scale forest biodiversity experiment in subtropical China, we demonstrated that changes in individual tree productivity were driven by species-specific pairwise interactions, with higher positive net pairwise interaction effects on trees in more diverse neighbourhoods. By perturbing the interactions strength from empirical data in simulations, we revealed that the positive differences between inter- and intra-specific interactions were the critical determinant for the emergence of positive DPRs. Surprisingly, the condition for positive DPRs corresponded to the condition for coexistence. Our results thus provide a novel insight into how pairwise tree interactions regulate DPRs, with implications for identifying the tree mixtures with maximized productivity to guide forest restoration and reforestation efforts.

Original languageEnglish
Article numbere14338
JournalEcology Letters
Volume27
Issue number1
Number of pages11
ISSN1461-023X
DOIs
Publication statusPublished - 01.2024

Bibliographical note

Publisher Copyright:
© 2023 The Authors. Ecology Letters published by John Wiley & Sons Ltd.

    Research areas

  • biodiversity–ecosystem functioning, competition, facilitation, interaction network, pairwise interaction
  • Biology

DOI

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