Do tree species characteristics influence soil respiration in tropical forests? A test based on 16 tree species planted in monospecific plots

Bréchet Laëtitia, Ponton Stéphane, Roy Jacques, Freycon Vincent, Coûteaux Marie-Madeleine, Bonal Damien, Epron Daniel. 2009. Do tree species characteristics influence soil respiration in tropical forests? A test based on 16 tree species planted in monospecific plots. Plant and Soil, 319 (1-2) : 235-246.

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : SOIL SCIENCE / Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : The high spatial variability of soil respiration in tropical rainforests is well evaluated, but influences of biotic factors are not clearly understood. This study underlines the influence of tree species characteristics on soil respiration across a 16-monospecific plot design in a tropical plantation of French Guiana. A large variability of soil CO2 fluxes was observed among plots (i.e. 2.8 to 6.8 ?mol m?2 s?1) with the ranking being constant across seasons. There were no significant relationships between soil respiration and soil moisture or soil temperature, neither spatially, nor seasonally. The variability of soil respiration was mainly explained by quantitative factors such as leaf litterfall and basal area. Surprisingly, no significant relationship was observed between soil respiration and root biomass. However, the influence of substrate quality was revealed by a strong relationship between soil respiration and litterfall P (and litterfall N, to a lesser extent).

Mots-clés Agrovoc : forêt tropicale, respiration du sol

Mots-clés géographiques Agrovoc : Guyane française, France

Classification Agris : P34 - Biologie du sol
K01 - Foresterie - Considérations générales

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

Auteurs et affiliations

• Bréchet Laëtitia, INRA (GUF)
• Ponton Stéphane, INRA (GUF)
• Roy Jacques, INRA (GUF)
• Freycon Vincent, CIRAD-ES-UPR Dynamique forestière (FRA)
• Coûteaux Marie-Madeleine, INRA (GUF)
• Bonal Damien, INRA (GUF)
• Epron Daniel, INRA (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/549452/)

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