B. Soulileuth
Centre national de la recherche scientifique
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Featured researches published by B. Soulileuth.
Scientific Reports | 2016
Emma Rochelle-Newall; Olivier Ribolzi; Marion Viguier; Chanthamousone Thammahacksa; Norbert Silvera; Keooudone Latsachack; Rinh Pham Dinh; Piyapong Naporn; Hai Tran Sy; B. Soulileuth; Nikom Hmaimum; Pem Sisouvanh; Henri Robain; Jean-Louis Janeau; Christian Valentin; Laurie Boithias; Alain Pierret
Lack of access to clean water and adequate sanitation continues to be a major brake on development. Here we present the results of a 12-month investigation into the dynamics of Escherichia coli, a commonly used indicator of faecal contamination in water supplies, in three small, rural catchments in Laos, Thailand and Vietnam. We show that land use and hydrology are major controlling factors of E. coli concentrations in streamwater and that the relative importance of these two factors varies between the dry and wet seasons. In all three catchments, the highest concentrations were observed during the wet season when storm events and overland flow were highest. However, smaller peaks of E. coli concentration were also observed during the dry season. These latter correspond to periods of intense farming activities and small, episodic rain events. Furthermore, vegetation type, through land use and soil surface crusting, combined with mammalian presence play an important role in determining E. coli loads in the streams. Finally, sampling during stormflow revealed the importance of having appropriate sampling protocols if information on maximum contamination levels is required as grab sampling at a fixed time step may miss important peaks in E. coli numbers.
FEMS Microbiology Ecology | 2018
Huong T. Le; Emma Rochelle-Newall; Yves Auda; Olivier Ribolzi; Oloth Sengtaheuanghoung; Elisa Thébault; B. Soulileuth; Thomas Pommier
Impact of land use (LU) change on stream environmental conditions and the inhabiting bacterial community remains rarely investigated, especially in tropical montane catchments. We examined the effects of LU change and its legacy along a tropical stream by comparing seasonal patterns of dissolved organic carbon (DOC) / colored dissolved organic matter (CDOM) in relation to variations in structure, diversity and metabolic capacities of particle-attached (PA) and free-living (FL) bacterial communities. We hypothesized that despite seasonal differences, hydrological flows that accumulate allochthonous carbon along the catchment are a major controlling factor of the bacterial community. Surprisingly, local environmental conditions that were largely related to nearby LU and the legacy of LU change were more important for stream bacterial diversity than hydrological connectivity. DOC was strongly correlated with PA richness and diversity. The legacy of LU change between teak plantation and annual crops induced high DOC and high diversity and richness of PA in the adjacent waters, while banana plantations were associated with high diversity of FL. The community structures of both PA and FL differed significantly between seasons. Our results highlight the importance of vicinal LU change and its legacy on aquatic bacterial communities in mixed used tropical watersheds.
Agriculture, Ecosystems & Environment | 2010
A. de Rouw; Sylvain Huon; B. Soulileuth; Pascal Jouquet; Alain Pierret; Olivier Ribolzi; Christian Valentin; Emmanuel Bourdon; B. Chantharath
Journal of Hydro-environment Research | 2015
Jean Causse; Gilles Billen; Josette Garnier; Thierry Henri-des-Tureaux; Xaypaseuth Olasa; Chanthamousone Thammahacksa; Keo Oudone Latsachak; B. Soulileuth; Oloth Sengtaheuanghoung; Emma Rochelle-Newall; Olivier Ribolzi
Weed Research | 2014
A. de Rouw; M. Casagrande; K. Phaynaxay; B. Soulileuth; K. Saito
Hydrology and Earth System Sciences Discussions | 2015
Guillaume Lacombe; Olivier Ribolzi; Anneke de Rouw; Alain Pierret; Keo Oudone Latsachak; Norbert Silvera; R. Pham Dinh; D. Orange; Jean L. Janeau; B. Soulileuth; H. Robain; A. Taccoen; P. Sengphaathith; Emmanuel Mouche; Oloth Sengtaheuanghoung; T. Tran Duc; Christian Valentin
The Journal "Agriculture and Forestry | 2008
Olivier Ribolzi; Jean-Pierre Thiébaux; Emmanuel Bourdon; Jean-Pierre Bricquet; Vincent Chaplot; Sylvain Huon; Pierre Marchand; Emmanuel Mouche; Alain Pierret; Henri Robain; Anneke de Rouw; Oloth Sengtaheuanghoung; B. Soulileuth; Christian Valentin
Soil Use and Management | 2018
M. Neyret; Henri Robain; A. de Rouw; B. Soulileuth; K. Trisophon; K. Jumpa; Christian Valentin
Agriculture, Ecosystems & Environment | 2018
Anneke de Rouw; Olivier Ribolzi; Mathilde Douillet; Hatsadong Tjantahosong; B. Soulileuth
Archive | 2017
Olivier Evrard; Olivier Ribolzi; Sylvain Huon; A. de Rouw.; Norbert Silvera; K. O. Latsachack; B. Soulileuth; Irène Lefèvre; Guillaume Lacombe; Oloth Sengtaheuanghoung; Christian Valentin