Long- term stability of productivity increases with tree diversity in Canadian forests

• 成果类型: Article
• 署名作者: Ding, Xiaxia; Reich, Peter B.; Hisano, Masumi; Chen, Han Y. H.
• 署名单位: Lakehead University; University of Michigan System; University of Michigan; University of Michigan System; University of Michigan; University of Minnesota System; University of Minnesota Twin Cities; Hiroshima University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-11548
• DOI: 10.1073/pnas.2405108121/-/DCSupplemental
• 发表日期: 2024-11-26
• 关键词: ecosystem stability; phylogenetic diversity; community dynamics; species-diversity; biodiversity; drought; CONSEQUENCES; mechanisms; evenness; package

摘要

The temporal stability of forest productivity is a key ecosystem function and an essential service to humanity. Plot- scale tree diversity experiments with observations over 10 to 11 y indicate that tree diversity increases stability under various environmental changes. However, it remains unknown whether these small- scale experimental findings are relevant to the longer- term stability of natural forests. Using 7,500 natural forest plots across much of Canada, monitored over three to four decades on average, we provide strong evidence that higher temporal stability (defined as the mean productivity divided by its SD over time) is consistently associated with greater tree functional, phylogenetic, and taxonomic diversity across all lengths of observations. Specifically, increasing functional diversity from its minimum to maximum values increases stability, mean productivity, and the temporal SD of productivity by 14%, 36%, and 28%, respectively. Our results highlight that the promotion of functionally, phylogenetically, and/or taxonomically diverse forests could enhance the long- term productivity and stability of natural forests.