The influence of spatially structured soil properties on tree community assemblages at a landscape scale in the tropical forests of southern Cameroon
Autor: | Adeline Fayolle, Achille Bernard Biwolé, Jason Vleminckx, Kasso Daïnou, Jean-Louis Doucet, Julie Morin-Rivat, Thomas Drouet, Olivier J. Hardy, Anaïs Gorel, Jean-François Gillet, David Bauman |
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Rok vydání: | 2016 |
Předmět: |
0106 biological sciences
Ecology Species distribution Edaphic Plant community Plant Science Spatial distribution 010603 evolutionary biology 01 natural sciences Abundance (ecology) Environmental science Biological dispersal Physical geography Tropical and subtropical moist broadleaf forests Relative species abundance Ecology Evolution Behavior and Systematics 010606 plant biology & botany |
Zdroj: | Journal of Ecology. 105:354-366 |
ISSN: | 0022-0477 |
Popis: | Summary Species distribution within plant communities results from both the influence of deterministic processes, related to environmental conditions, and neutral processes related to dispersal limitation and stochastic events, the relative importance of each factor depending on the observation scale. Assessing the relative contribution of environment necessitates controlling for spatial dependences among data points. Recent methods, combining multiple regression and Moran's eigenvectors maps (MEM), have been proved successful in disentangling the influence of pure spatial processes related to dispersal limitation, pure environmental variables (not spatially structured) and spatially structured environmental properties. However, the latter influence is usually not testable when using advanced spatial models like MEM. To overcome this issue, we propose an original approach, based on torus-translations and Moran spectral randomizations, to test the fraction of species abundance variation that is jointly explained by space and seven soil variables, using three environmental and tree species abundance data sets (consisting of 120, 52 and 34 plots of 0·2 ha each, located along 101-, 66- and 35-km-long transect-like inventories, respectively) collected in tropical moist forests in southern Cameroon. The overall abundance of species represented by ≥30 individuals, and 27% of these species taken individually, were significantly explained by fine-scale ( |
Databáze: | OpenAIRE |
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