LaliberteNortonScott2013

Référence

Laliberté, E., Norton, D.A. and Scott, D. (2013) Contrasting effects of productivity and disturbance on plant functional diversity at local and metacommunity scales. Journal of Vegetation Science, 24(5):834-842. (Scopus )

Résumé

Questions: Is trait convergence more intense when soil resource availability and disturbance constrain productivity and limit above-ground competition? Do the effects of productivity and disturbance on functional diversity differ between the local and metacommunity scales? Location: Semi-arid grasslands in New Zealand (43°59' S, 170°27' E). Methods: We measured trait convergence and divergence in grasslands along gradients of primary productivity and disturbance at local (i.e. 1 m × 1 m) and metacommunity (8 m × 50 m) scales, using long-term (27-yr) manipulations of soil resource availability and grazing intensity. We compared trait dispersion metrics to those expected under different null models. Results: At the metacommunity scale, we found stronger trait convergence with increasing productivity and grazing intensity, where all short, slow-growing species were excluded from the potential species pool. However, once this broad-scale filter on species pool was taken into account, we found that at the local scale, abundance-weighted functional dispersion of co-occurring species was stronger than expected under our null model, thereby suggesting limiting similarity. Moreover, trait divergence became stronger at higher productivity and lower grazing intensity, where size-asymmetric competition for light is likely to have been more intense. Conclusions: At the metacommunity scale, environmental filtering led to species with particular traits being excluded from the species pool. In contrast, at the local community scale where individuals interact, there was evidence of limiting similarity. Our results suggest that environmental filtering and limiting similarity are not mutually exclusive and jointly determine community structure, but can operate at different spatial scales. At the metacommunity scale, environmental filtering led to species with particular traits being excluded from the species pool. In contrast, at the local community scale where individuals interact, there was evidence of limiting similarity. Our results suggest that environmental filtering and limiting similarity are not mutually exclusive and jointly determine community structure, but operate at different spatial scales. © 2012 International Association for Vegetation Science.

Format EndNote

Vous pouvez importer cette référence dans EndNote.

Format BibTeX-CSV

Vous pouvez importer cette référence en format BibTeX-CSV.

Format BibTeX

Vous pouvez copier l'entrée BibTeX de cette référence ci-bas, ou l'importer directement dans un logiciel tel que JabRef .

@ARTICLE { LaliberteNortonScott2013,
    AUTHOR = { Laliberte, E. and Norton, D.A. and Scott, D. },
    TITLE = { Contrasting effects of productivity and disturbance on plant functional diversity at local and metacommunity scales },
    JOURNAL = { Journal of Vegetation Science },
    YEAR = { 2013 },
    VOLUME = { 24 },
    PAGES = { 834-842 },
    NUMBER = { 5 },
    NOTE = { cited By 17 },
    ABSTRACT = { Questions: Is trait convergence more intense when soil resource availability and disturbance constrain productivity and limit above-ground competition? Do the effects of productivity and disturbance on functional diversity differ between the local and metacommunity scales? Location: Semi-arid grasslands in New Zealand (43°59' S, 170°27' E). Methods: We measured trait convergence and divergence in grasslands along gradients of primary productivity and disturbance at local (i.e. 1 m × 1 m) and metacommunity (8 m × 50 m) scales, using long-term (27-yr) manipulations of soil resource availability and grazing intensity. We compared trait dispersion metrics to those expected under different null models. Results: At the metacommunity scale, we found stronger trait convergence with increasing productivity and grazing intensity, where all short, slow-growing species were excluded from the potential species pool. However, once this broad-scale filter on species pool was taken into account, we found that at the local scale, abundance-weighted functional dispersion of co-occurring species was stronger than expected under our null model, thereby suggesting limiting similarity. Moreover, trait divergence became stronger at higher productivity and lower grazing intensity, where size-asymmetric competition for light is likely to have been more intense. Conclusions: At the metacommunity scale, environmental filtering led to species with particular traits being excluded from the species pool. In contrast, at the local community scale where individuals interact, there was evidence of limiting similarity. Our results suggest that environmental filtering and limiting similarity are not mutually exclusive and jointly determine community structure, but can operate at different spatial scales. At the metacommunity scale, environmental filtering led to species with particular traits being excluded from the species pool. In contrast, at the local community scale where individuals interact, there was evidence of limiting similarity. Our results suggest that environmental filtering and limiting similarity are not mutually exclusive and jointly determine community structure, but operate at different spatial scales. © 2012 International Association for Vegetation Science. },
    AUTHOR_KEYWORDS = { Assembly rules; Disturbance; Environmental filtering; Functional diversity; Land-use change; Limiting similarity; Null models },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/jvs.12044 },
    KEYWORDS = { assembly rule; disturbance; divergence; functional change; grassland; grazing; land use change; primary production; resource availability; semiarid region; species occurrence; species pool, New Zealand },
    SOURCE = { Scopus },
    URL = { http://www.scopus.com/inward/record.url?eid=2-s2.0-84881304123&partnerID=40&md5=c1953514b635c43022847a86a220a8aa },
}

********************************************************** ***************** Facebook Twitter *********************** **********************************************************

Abonnez-vous à
l'Infolettre du CEF!

********************************************************** ************* Écoles d'été et formation **************************** **********************************************************

Écoles d'été et formations

Ecole d'été en Biologie et Ecologie intégratives 
6-12 juillet 2019, Pyrénées françaises
École d'été en modélisation de la biodiversité 
19-23 août 2019, Orford
Cours aux cycles supérieurs: Aménagement des écosystèmes forestiers 
19-30 août 2019, Station FERLD

********************************************************** ***************** Pub - Symphonies_Boreales ****************** **********************************************************

********************************************************** ***************** Boîte à trucs *************** **********************************************************

CEF-Référence
La référence vedette !

Jérémie Alluard (2016) Les statistiques au moments de la rédaction 

  • Ce document a pour but de guider les étudiants à intégrer de manière appropriée une analyse statistique dans leur rapport de recherche.

Voir les autres...