Forest biodiversity increases productivity via complementarity from greater canopy structural complexity

IF 9.1 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Proceedings of the National Academy of Sciences of the United States of America Pub Date : 2025-10-01 DOI:10.1073/pnas.2506750122

Xianglu Deng, Bernhard Schmid, Helge Bruelheide, Chen Chen, Yi Li, Shan Li, Felix Morsdorf, Tama Ray, Meredith C. Schuman, Ting Tang, Goddert von Oheimb, Keping Ma, Xiaojuan Liu

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引用次数: 0

Abstract

The horizontal distribution and vertical stratification of tree crowns can affect light interception and tree growth, thus driving forest productivity and carbon storage. However, how canopy structure is affected by tree diversity and thus can mediate its effects on productivity remains unclear. Using 4-y consecutive unmanned aerial vehicle-borne light detection and ranging and ground-based growth measurements from 482 plots and 38,088 trees, 11 to 15 y after planting, within a large-scale forest biodiversity experiment in southeast China, we found that increased canopy structural complexity consistently explains the positive effects of tree diversity on productivity. Species complementarity was the main mediator of diversity-enhanced productivity, with the positive complementarity effects strengthening over time. Our study underscores the importance of establishing multispecies forest communities with complex canopy structure to maximize productivity and carbon sequestration in forest ecosystems.

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森林生物多样性通过树冠结构复杂性的互补性提高了生产力

树冠的水平分布和垂直分层可以影响树木的截光和生长，从而推动森林生产力和碳储量。然而，树冠结构如何受到树木多样性的影响，从而如何调节其对生产力的影响尚不清楚。在中国东南部大型森林生物多样性试验中，采用4-y连续无人机光探测和测量技术，对482个样地和38,088棵树在种植后11 - 15 y的地面生长数据进行测量，发现树冠结构复杂性的增加一致地解释了树木多样性对生产力的积极影响。物种互补性是物种多样性提高生产力的主要中介，其正互补效应随着时间的推移而增强。我们的研究强调了建立具有复杂树冠结构的多物种森林群落对于最大限度地提高森林生态系统的生产力和碳封存的重要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the National Academy of Sciences of the United States of America 综合性期刊-综合性期刊

CiteScore

19.00

自引率

0.90%

发文量

3575

审稿时长

2.5 months

期刊介绍： The Proceedings of the National Academy of Sciences (PNAS), a peer-reviewed journal of the National Academy of Sciences (NAS), serves as an authoritative source for high-impact, original research across the biological, physical, and social sciences. With a global scope, the journal welcomes submissions from researchers worldwide, making it an inclusive platform for advancing scientific knowledge.