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Titre du document / Document title

Ecological determinism in plant community structure across a tropical forest landscape

Auteur(s) / Author(s)

SVENNING J.-C. (1 2) ; KINNER D. A. (3 4) ; STALLARD R. F. (1 3) ; ENGELBRECHT B. M. J. (1) ; WRIGHT S. J. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Ancón, PANAMA
(2) INSTAAR (Institute of Arctic and Alpine Research), University of Colorado, Boulder, Colorado 80309-0450, ETATS-UNIS
(3) Republic of Panamá, Boulder, Colorado 80303-1066, ETATS-UNIS
(4) U.S. Geological Survey-Water Resources Discipline, 3215 Marine Street, Suite E-127, Boulder, Colorado 80303-1066, ETATS-UNIS

Résumé / Abstract

The ecological mechanisms hypothesized to structure species-rich communities range from strict local determinism to neutral ecological drift. We assessed the degree of ecological determinism in tropical plant community structure by analyses of published demographic data; a broad range of spatial, historical, and environmental variables; and the distributions of 33 herbaceous species (plot size = 0.02 ha) and 61 woody species (plot size = 0.09 ha) among 350 plots in a 16-km2 forest landscape (Barro Colorado Island, Panamá). We found a strong degree of cross-landscape dominance by a subset of species whose identities were predictable from sapling survivorship rates under shade. Using canonical ordination we found that spatial and environmental-historical factors were of comparable importance for controlling within-landscape variability in species composition. Past land use had a strong impact on species composition despite ceasing 100-200 years ago. Furthermore, edaphic-hydrological factors, treefall gaps, and an edge effect all had unique impacts on species composition. Hence, ecological determinism was evident in terms of both cross-landscape dominance and within-landscape variability in species composition. However, at the latter scale, the large portion of the explained variance in species composition among plots uniquely attributed to spatial location pointed to an equally important role for neutral processes.

Revue / Journal Title

Ecology    ISSN  0012-9658   CODEN ECGYAQ 

Source / Source

2004, vol. 85, no9, pp. 2526-2538 [13 page(s) (article)] (1 p.1/2)

Langue / Language

Anglais

Editeur / Publisher

Ecological Society of America, Washington, DC, ETATS-UNIS  (1920) (Revue)

Mots-clés anglais / English Keywords

America

;

North America

;

United States

;

Autocorrelation

;

Tolerance

;

Redundancy

;

Ecological niche

;

Plant

;

Mesoscale

;

Dispersion

;

Island

;

Colorado

;

Landscape

;

Tropical forest

;

Community structure

;

Plant community

;

Ecology

;

Mots-clés français / French Keywords

Amérique

;

Amérique du Nord

;

Etats Unis

;

Autocorrélation

;

Tolérance

;

Redondance

;

Niche écologique

;

Plante

;

Mésoéchelle

;

Dispersion

;

Ile

;

Colorado

;

Paysage

;

Forêt tropicale

;

Structure communauté

;

Groupement végétal

;

Ecologie

;

Mots-clés espagnols / Spanish Keywords

America

;

America del norte

;

Estados Unidos

;

Autocorrelación

;

Tolerancia

;

Redundancia

;

Nicho ecológico

;

Planta

;

Mesoescala

;

Dispersión

;

Isla

;

Colorado

;

Paisaje

;

Bosque tropical

;

Estructura comunidad

;

Comunidad vegetal

;

Ecología

;

Mots-clés d'auteur / Author Keywords

Barro Colorado Island

;

dispersal limitation

;

mesoscale plant distributions

;

niche differences

;

oligarchy hypothesis

;

partial RDA

;

plant community assembly

;

redundancy analysis

;

shade tolerance

;

spatial autocorrelation

;

tropical forest

;

variance decomposition

;

Localisation / Location

INIST-CNRS, Cote INIST : 3018, 35400012241353.0180

Nº notice refdoc (ud4) : 16178185



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