Diversity in Resource Use Strategies Promotes Productivity in Young Planted Tree Species Mixtures

作者：Joel Jensen, Haben Blondeel, Joannès Guillemot, Florian Schnabel, Hernán Serrano‐León, Harald Auge, Lander Baeten, Nadia Barsoum, Jürgen Bauhus, Christel Baum, Raimundo Bermúdez, Friderike Beyer, Pedro H. S. Brancalion, Jeannine Cavender‐Bares, Nico Eisenhauer, Adam Felton, Olga Ferlian, Sebastian Fiedler, Tobias Gebauer, Douglas L. Godbold, Peter Hajek, Jefferson S. Hall, Dirk Hölscher, Hervé Jactel, Holger Kreft, Cathleen Lapadat, Chloe MacLaren, Nicolas Martin‐StPaul, Céline Meredieu, Simone Mereu, Christian Messier, Rebecca Montgomery, Bart Muys, Charles A. Nock, John D. Parker, William C. Parker, Gustavo B. Paterno, Michael P. Perring, Quentin Ponette, Catherine Potvin, Peter B. Reich, James S. Rentch, Boris Rewald, Agnès Robin, Michael Scherer‐Lorenzen, Hans Sandén, Katherine Sinacore, Rachel J. Standish, Artur Stefański, Kris Verheyen, Laura Williams, Martin Weih · 发表于：Global Change Biology · 年份：2025 · DOI：10.1111/gcb.70493 · 被引用次数：8 · 研究领域：Ecology and Vegetation Dynamics Studies、Forest Management and Policy、Forest ecology and management

Mixed-species forestry is a promising approach to enhance productivity, increase carbon sequestration, and mitigate climate change. Diverse forests, composed of species with varying structures and functional trait profiles, may have higher functional and structural diversity, which are attributes relevant to a number of mechanisms that can influence productivity. However, it remains unclear whether the context-dependent roles of functional identity, functional diversity, and structural diversity can lead to a generalized understanding of tree diversity effects on stand productivity. To address these gaps, we analyzed growth data from 83,600 trees from 89 species across 21 young tree diversity experiments spanning five continents and three biomes. Results revealed a positive saturating relationship between tree species richness and stand productivity, with reduced variability in growth rates among more diverse stands. Structural equation modeling demonstrated that functional diversity mediated the positive effects of species richness on productivity. We additionally report a negative relationship between structural diversity and productivity, which decreased with increasing species richness. When partitioning net diversity effects, we found that selection effects played a dominant role in driving the overall increase in productivity in these predominantly young stands, contributing 77% of the net diversity effect. Selection effects increased with diversity in wood density. Fur...