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Article Dans Une Revue Journal of Ecology Année : 2018

Habitat filtering determines the functional niche occupancy of plant communities worldwide

1 UdeS - Département de biologie [Sherbrooke]
2 State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
3 Département de Biologie
4 School of Plant Biology, University of Western Australia, Perth, WA, Australia
5 Institute for Land, Water and Society, Charles Sturt University, Albury, NSW, Australia
6 Institute of Geography, Federal University of Uberlândia – UFU, Uberlândia, Brazil
7 Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
8 Evolution and Ecology Research Centre [UNSW Sydney]
9 Dpt Biological Sciences, Macquarie University
10 Department of Evolution and Ecology
11 Department of Biology, Algoma University, Marie, OA, Canada
12 Department of Biology, University of California Riverside, Riverside, CA, USA
13 ECOBIO - Ecosystèmes, biodiversité, évolution [Rennes]
14 Department of Botany, University of Wyoming
15 Manaaki Whenua – Landcare Research [Lincoln]
16 Department of Botany, University of South Bohemia
17 Área de Biodiversidad y Conservación, Departamento de Biología y Geología, Física y Química Inorgánica, Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Móstoles, Spain
18 IEU - Department of Evolutionary Biology and Environmental Studies
19 IPE - CSIC - Instituto Pirenaico de Ecologìa = Pyrenean Institute of Ecology [Zaragoza]
20 Skane University Hospital [Lund]
21 CEBC - Centre d'Études Biologiques de Chizé - UMR 7372
22 Departamento de Ecologia, Universidade Federal de Goiás, Goiânia, Goiás, Brazil
23 UREP - Unité Mixte de Recherche sur l'Ecosystème Prairial - UMR
24 Graduate School of Life Sciences, Tohoku University, Sendai, Japan
25 Tohoku University [Sendai]
26 Chiba University
27 UF|Biology - Department of Biology [Gainesville]
28 UR EMGR - Ecosystèmes montagnards
29 State Key Laboratory of Grassland Agro-Ecosystem, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, China
30 Department of Conservation Biology [UFZ Leipzig]
31 UFSCar - Universidade Federal de São Carlos [São Carlos]
Bill Shipley
Andrew Siefert
  • Fonction : Auteur
  • PersonId : 973636
Takehiro Sasaki
  • Fonction : Auteur
Stéphanie Gaucherand

Résumé

How the patterns of niche occupancy vary from species-poor to species-rich communities is a fundamental question in ecology that has a central bearing on the processes that drive patterns of biodiversity. As species richness increases, habitat filtering should constrain the expansion of total niche volume, while limiting similarity should restrict the degree of niche overlap between species. Here, by explicitly incorporating intraspecific trait variability, we investigate the relationship between functional niche occupancy and species richness at the global scale. 2.We assembled 21 datasets worldwide, spanning tropical to temperate biomes and consisting of 313 plant communities representing different growth forms. We quantified three key niche occupancy components (the total functional volume, the functional overlap between species and the average functional volume per species) for each community, related each component to species richness, and compared each component to the null expectations. 3.As species richness increased, communities were more functionally diverse (an increase in total functional volume), and species overlapped more within the community (an increase in functional overlap) but did not more finely divide the functional space (no decline in average functional volume). Null model analyses provided evidence for habitat filtering (smaller total functional volume than expectation), but not for limiting similarity (larger functional overlap and larger average functional volume than expectation) as a process driving the pattern of functional niche occupancy. 4.Synthesis. Habitat filtering is a widespread process driving the pattern of functional niche occupancy across plant communities and coexisting species tend to be more functionally similar rather than more functionally specialized. Our results indicate that including intraspecific trait variability will contribute to a better understanding of the processes driving patterns of functional niche occupancy

Dates et versions

hal-01598274 , version 1 (29-09-2017)

Identifiants

Citer

Yuanzhi Li, Bill Shipley, Jodi N. Price, Vinícius de L. Dantas, Riin Tamme, et al.. Habitat filtering determines the functional niche occupancy of plant communities worldwide. Journal of Ecology, 2018, 106 (3), pp.1001-1009. ⟨10.1111/1365-2745.12802⟩. ⟨hal-01598274⟩
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