ZeuginPotvinJansaEtAl2010

Référence

Zeugin, F., Potvin, C., Jansa, J., Scherer-Lorenzen, M. (2010) Is tree diversity an important driver for phosphorus and nitrogen acquisition of a young tropical plantation? Forest Ecology and Management, 260(9):1424-1433. (URL )

Résumé

Many tropical plantations in Central America are monocultures of fast growing, mostly exotic species such as a teak, eucalypts and pines. This has been perceived as a problem for ecosystem stability, pest control, local biodiversity and long-term nutrient availability. In our study, we followed the effects of increasing tree diversity (1, 3 and 6 native species) on aboveground nitrogen (N) and phosphorus (P) pools in a young experimental biodiversity plantation (central Panama) over two subsequent years. Our results show a positive but not consistent net effect of biodiversity on the N and P pools, mainly explained by the complementarity effect. N and P use efficiencies strongly varied among the investigated tree species and the species richness gradient. Anacardium excelsum and Luehea seemannii were associated with higher N and P use efficiencies while Hura crepitans and Tabebuia rosea were less efficient in aboveground biomass production per unit N or P. Tree species tended to have lower P use efficiencies in the intermediate diversity level compared to monocultures and six-species mixtures. Although the environmental conditions explained a large part of the variation in the N and P pools (58%) in our experiment, we argue that incorporating tree mixtures in the management can bring additional benefits and improve tree growth and nutrient uptake as compared to the monocultures.

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@ARTICLE { ZeuginPotvinJansaEtAl2010,
    AUTHOR = { Zeugin, F. and Potvin, C. and Jansa, J. and Scherer-Lorenzen, M. },
    TITLE = { Is tree diversity an important driver for phosphorus and nitrogen acquisition of a young tropical plantation? },
    JOURNAL = { Forest Ecology and Management },
    YEAR = { 2010 },
    VOLUME = { 260 },
    PAGES = { 1424-1433 },
    NUMBER = { 9 },
    MONTH = { sep },
    ABSTRACT = { Many tropical plantations in Central America are monocultures of fast growing, mostly exotic species such as a teak, eucalypts and pines. This has been perceived as a problem for ecosystem stability, pest control, local biodiversity and long-term nutrient availability. In our study, we followed the effects of increasing tree diversity (1, 3 and 6 native species) on aboveground nitrogen (N) and phosphorus (P) pools in a young experimental biodiversity plantation (central Panama) over two subsequent years. Our results show a positive but not consistent net effect of biodiversity on the N and P pools, mainly explained by the complementarity effect. N and P use efficiencies strongly varied among the investigated tree species and the species richness gradient. Anacardium excelsum and Luehea seemannii were associated with higher N and P use efficiencies while Hura crepitans and Tabebuia rosea were less efficient in aboveground biomass production per unit N or P. Tree species tended to have lower P use efficiencies in the intermediate diversity level compared to monocultures and six-species mixtures. Although the environmental conditions explained a large part of the variation in the N and P pools (58%) in our experiment, we argue that incorporating tree mixtures in the management can bring additional benefits and improve tree growth and nutrient uptake as compared to the monocultures. },
    ISSN = { 0378-1127 },
    KEYWORDS = { Biodiversity and ecosystem functioning, Nutrient use efficiency, Sardinilla, Panama, Tropical tree plantations, Resource complementarity, Environmental heterogeneity },
    OWNER = { Luc },
    TIMESTAMP = { 2010.10.04 },
    URL = { http://www.sciencedirect.com/science/article/B6T6X-50VSVCC-2/2/897652e622afbabcbe7ab943f2e5064a },
}

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