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, 8) , Kouki Hikosaka , Benjamin Jackson , Vincent Jung (9) , Chiho Kamiyama , Masatoshi Katabuchi , Steven W. Kembel , Emilie Kichenin , Nathan J. B. Kraft , Anna Lagerström , Yoann Le Bagousse-Pinguet (10) , Yuanzhi Li , Norman Mason , Julie Messier (11) , Tohru Nakashizuka , Jacob Mcc. Overton , Duane A. Peltzer , I. M. Pérez-Ramos , Valério D. Pillar , Honor C. Prentice , Sarah Richardson (12) , Takehiro Sasaki , Brandon S. Schamp , Christian Schöb (13) , Bill Shipley (14) , Maja Sundqvist , Martin T. Sykes (15) , Marie Vandewalle (16) , David A Wardle

1 Department of Evolution and Ecology
2 CEFE - Centre d’Ecologie Fonctionnelle et Evolutive
3 UGA [2016-2019] - Université Grenoble Alpes [2016-2019]
4 IMBE - Institut méditerranéen de biodiversité et d'écologie marine et continentale
5 UMR ECOFOG - Ecologie des forêts de Guyane
6 UR EMGR - Ecosystèmes montagnards
7 Bio-Protection Research Centre
8 CEBC - Centre d'Études Biologiques de Chizé - UMR 7372
9 ECOBIO - Ecosystèmes, biodiversité, évolution [Rennes]
10 Department of Botany and Faculty of Sciences
11 EEB - Ecology and Evolutionary Biology [Tucson]
12 Manaaki Whenua – Landcare Research [Lincoln]
13 IEU - Department of Evolutionary Biology and Environmental Studies
14 Département de Biologie
15 Department of Physical Geography and Ecosystem Science [Lund]
16 Department of Earth and Ecosystem Sciences [Lund]

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.

Mots clés: leaf trait; interspecific variation; functional diversity; intraspecific variability; plant functional trait; community ecology; trait-based ecology

Domaines: Sciences du Vivant [q-bio]

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, 2015, 18 (12), pp.1406--1419. ⟨10.1111/ele.12508⟩. ⟨hal-01237101⟩