Tree diversity reduces variability in sapling survival under drought

作者：Haben Blondeel, Joannès Guillemot, Nicolas K Martin-StPaul, Arsène Druel, Simon Bilodeau‐Gauthier, Jürgen Bauhus, Charlotte Grossiord, Andy Hector, Hervé Jactel, Joel Jensen, Christian Messier, Bart Muys, Hernán Serrano‐León, Harald Auge, Nadia Barsoum, Emiru Bırhane, Helge Bruelheide, Jeannine M. Cavender-Bares, Chengjin Chu, Jonathan Cumming, Abebe Damtew, Nico Eisenhauer, Olga Ferlian, Sebastian Rainer Fiedler, Gislene Ganade, Douglas L. Godbold, Dominique Gravel, Jefferson S. Hall, Dirk Hölscher, Kristin B. Hulvey, Julia Koricheva, Holger Kreft, Cathleen N. Lapadat, Jingjing Liang, Xiaojuan Liu, Céline Meredieu, Simone Mereu, Rebecca Montgomery, Lourdes Morillas, Charles A. Nock, Alain Paquette, John D. Parker, William C. Parker, Gustavo Brant Paterno, Michael Philip Perring, Quentin Ponette, Catherine Potvin, Peter B. Reich, James S. Rentch, Boris Rewald, Hans Sandén, Katherine Sinacore, Rachel Jayne Standish, Artur Stefański, Patrick C. Tobin, Michiel van Breugel, Marina V. Fagundes, Martin Weih, Laura Williams, Mo Zhou, Michael Scherer‐Lorenzen, Kris Verheyen, Lander Baeten · 发表于：Journal of Ecology · 年份：2024 · DOI：10.1111/1365-2745.14294 · 被引用次数：25 · 研究领域：Ecology and Vegetation Dynamics Studies、Plant Water Relations and Carbon Dynamics、Forest ecology and management

Abstract Enhancing tree diversity may be important to fostering resilience to drought‐related climate extremes. So far, little attention has been given to whether tree diversity can increase the survival of trees and reduce its variability in young forest plantations. We conducted an analysis of seedling and sapling survival from 34 globally distributed tree diversity experiments (363,167 trees, 168 species, 3744 plots, 7 biomes) to answer two questions: (1) Do drought and tree diversity alter the mean and variability in plot‐level tree survival, with higher and less variable survival as diversity increases? and (2) Do species that survive poorly in monocultures survive better in mixtures and do specific functional traits explain monoculture survival? Tree species richness reduced variability in plot‐level survival, while functional diversity (Rao's Q entropy) increased survival and also reduced its variability. Importantly, the reduction in survival variability became stronger as drought severity increased. We found that species with low survival in monocultures survived comparatively better in mixtures when under drought. Species survival in monoculture was positively associated with drought resistance (indicated by hydraulic traits such as turgor loss point), plant height and conservative resource‐acquisition traits (e.g. low leaf nitrogen concentration and small leaf size). Synthesis. The findings highlight: (1) The effectiveness of tree diversity for decreasing the varia...