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A global meta-analysis of the relative extent of intraspecific trait variation in plant communities

Andrew Siefert 1, * Cyrille Violle 2 Loïc Chalmandrier 3 Cécile H. Albert 4 Adrien Taudiere 2 Alex Fajardo Lonnie W. Aarssen Christopher Baraloto 5 Marcos B. Carlucci Marcus V. Cianciaruso Vinícius De L. Dantas Francesco De Bello Leandro D. S. Duarte Carlos R. Fonseca Grégoire T. Freschet Stéphanie Gaucherand 6 Nicolas Gross 7, 8, 9 Kouki Hikosaka Benjamin Jackson Vincent Jung 10 Chiho Kamiyama Masatoshi Katabuchi Steven W. Kembel Emilie Kichenin Nathan J. B. Kraft Anna Lagerström Yoann Le Bagousse-Pinguet 11 Yuanzhi Li Norman Mason Julie Messier 12 Tohru Nakashizuka Jacob Mcc. Overton Duane A. Peltzer I. M. Pérez-Ramos Valério D. Pillar Honor C. Prentice Sarah Richardson 13 Takehiro Sasaki Brandon S. Schamp Christian Schöb 14 Bill Shipley 15 Maja Sundqvist Martin T. Sykes 16 Marie Vandewalle 17 David A Wardle 
Abstract : Recent studies have shown that accounting for intraspecific trait variation (ITV) may better address major questions in community ecology. However, a general picture of the relative extent of ITV compared to interspecific trait variation in plant communities is still missing. Here, we conducted a meta-analysis of the relative extent of ITV within and among plant communities worldwide, using a data set encompassing 629 communities (plots) and 36 functional traits. Overall, ITV accounted for 25% of the total trait variation within communities and 32% of the total trait variation among communities on average. The relative extent of ITV tended to be greater for whole-plant (e.g. plant height) vs. organ-level traits and for leaf chemical (e.g. leaf N and P concentration) vs. leaf morphological (e.g. leaf area and thickness) traits. The relative amount of ITV decreased with increasing species richness and spatial extent, but did not vary with plant growth form or climate. These results highlight global patterns in the relative importance of ITV in plant communities, providing practical guidelines for when researchers should include ITV in trait-based community and ecosystem studies.
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Submitted on : Wednesday, December 2, 2015 - 4:37:58 PM
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Andrew Siefert, Cyrille Violle, Loïc Chalmandrier, Cécile H. Albert, Adrien Taudiere, et al.. A global meta-analysis of the relative extent of intraspecific trait variation in plant communities. Ecology Letters, Wiley, 2015, 18 (12), pp.1406--1419. ⟨10.1111/ele.12508⟩. ⟨hal-01237101⟩



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