Managing watershed services of tropical forests and plantations: Can meta-analyses help?

Locatelli Bruno, Vignola Raffaele. 2009. Managing watershed services of tropical forests and plantations: Can meta-analyses help?. Forest Ecology and Management, 258 (9) : 1864-1870.

https://doi.org/10.1016/j.foreco.2009.01.015

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Quartile : Q1, Sujet : FORESTRY

Résumé : The watershed services provided by tropical natural and planted forests are critical to human well-being. An increasing number of valuation studies and experiences with payment for ecosystem services have dealt with the role of ecosystems in regulating the flow of water. However, several studies and experiences have been based on misconceptions about the role of forests and plantations in the hydrological cycle, despite the publication ofmany reviews by hydrologists. The objective of this paper is to evaluate whether meta-analyses applied to studies comparing water flows in tropical watersheds under natural or planted forests and non-forest lands can provide useful results for valuing watershed ecosystem services and making decisions. The meta-analyses show significantly lower total flows or base flows under planted forests than non-forest land uses. Meta-analyses conducted with subsamples of the data also show lower total flow and higher base flow under natural forests than non-forest land uses. However, the available studies were restricted to humid climates and particular forest types (Pinus and Eucalyptus planted forests and lowland natural forests). The small number of available studies with sufficient original data is a major constraint in the application of meta-analyses. This represents a major technical challenge for valuation studies or payment for ecosystem services, especially in countries where financial resources for implementing field research are scarce.

Mots-clés Agrovoc : forêt tropicale, eau, Pinus, Eucalyptus

Mots-clés géographiques Agrovoc : Afrique, Amérique latine, Asie

Classification Agris : P01 - Conservation de la nature et ressources foncières
K01 - Foresterie - Considérations générales
K10 - Production forestière
P10 - Ressources en eau et leur gestion

Champ stratégique Cirad : Axe 6 (2005-2013) - Agriculture, environnement, nature et sociétés

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