TY  - JOUR
AU  - Fromin, N.
AU  - Porte, B.
AU  - Lensi, R.
AU  - Hamelin, J.
AU  - Domenach, A.-M.
AU  - Buatois, B.
AU  - Roggy, J.-C.
PY  - 2012//
TI  - Spatial variability of the functional stability of microbial respiration process: A microcosm study using tropical forest soil
T2  - J. Soils Sed.
JO  - Journal of Soils and Sediments
SP  - 1030
EP  - 1039
VL  - 12
IS  - 7
KW  - Disturbance
KW  - Diversity-stability relationship
KW  - Microbial diversity
KW  - Substrate-induced respiration
N2  - Purpose: Understanding the ability of ecosystem processes to resist to and to recover from disturbances is critical to sustainable land use. However, the spatial variability of the stability has rarely been addressed. Here, we investigated the functional stability of a soil microbial process for 24 soils collected from adjacent locations from a 0. 3 ha tropical rainforest plot in Paracou, French Guiana. Materials and methods: The 24 locations were characterized regarding soil chemical and biological (microbial diversity) parameters and forest structure. The corresponding soils were submitted to an experimental transient heat disturbance during a microcosm experiment. The response of the respiration process was followed using substrate-induced respiration (SIR). Results and discussion: The response of soil SIR to heat disturbance varied widely between samples. The variability of the SIR response increased just after the disturbance, and a global rather homogeneous decrease in SIR rates was observed 15 and 30 days after. The stability of SIR in response to heat disturbance could not be related to either the genetic or the metabolic diversity of the microbial community. The initial level of SIR before the disturbance was the soil variable that best correlated with the impact of the disturbance: the soil locations with the highest initial SIR rates were the most affected 15 and 30 days after the heat disturbance. Conclusions: Such a heterogeneous response suggests that the response of soil processes to a disturbance will be difficult to assess from only local-scale analyses and highlights the need for spatial explicitness in understanding biogeochemical processes. © 2012 Springer-Verlag.
SN  - 14390108 (Issn)
UR  - http://www.scopus.com/inward/record.url?eid=2-s2.0-84864078354&partnerID=40&md5=34bebc2c0036ee3882a5cd091bf70308
N1  - Export Date: 30 July 2012; Source: Scopus; doi: 10.1007/s11368-012-0528-7; Language of Original Document: English; Correspondence Address: Fromin, N.; CEFE, CNRS UMR 5175, 1919 Route de Mende, 34293 Montpellier cedex 5, France; email: nathalie.fromin@cefe.cnrs.fr
ID  - Fromin_etal2012
ER  -