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Contrasting soil structures in long term bare fallow treatments and its relation to C storage in soil: is organic matter physically protected in the long term? Texto completo
2011
Paradelo, Remigio, | Chenu, Claire | Van Oort, Folkert,
absent
Mostrar más [+] Menos [-]Does the sensitivity of the soil oragnic matter mineralization to a change of temperature depend on its quality? Texto completo
2011
Lefèvre, Romain | Barré, Pierre | Bardoux, Gérard | Christensen, Bent | Girardin, Cyril | Houot, Sabine | Katterer, Thomas | Van Oort, Folkert | Chenu, Claire
absent
Mostrar más [+] Menos [-]SOC pools dynamics and stability in the 80 years bare fallow chronosequence at Versailles. Evidence of mineral-associated SOC stabilization Texto completo
2011
Vasilyeva, N. | Van Oort, Folkert, | Chenu, Claire
SOC pools dynamics and stability in the 80 years bare fallow chronosequence at Versailles. Evidence of mineral-associated SOC stabilization Texto completo
2011
Vasilyeva, N. | Van Oort, Folkert, | Chenu, Claire
What is the chemical nature of stable carbon? Using soils from a long term bare fallow to answer this question Texto completo
2011
LUTFALLA, Suzanne | Quenea, Katell | Van Oort, Folkert, | Chenu, Claire
What is the chemical nature of stable carbon? Using soils from a long term bare fallow to answer this question Texto completo
2011
LUTFALLA, Suzanne | Quenea, Katell | Van Oort, Folkert, | Chenu, Claire
Heavy metal availability and their relationships with soil microbial characteristics in agricultural carbonated soils Texto completo
2011
de Santiago Martin, Ana | Cheviron, Nathalie | Quintana, Jose R. | González Huecas, Concepción | López Lafuente, Antonio | Mougin, Christian | Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM) | Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés (PESSAC) ; Institut National de la Recherche Agronomique (INRA) | Departamento de Edafologia, Facultad de Farmacia ; Universidad Complutense de Madrid = Complutense University of Madrid [Madrid] (UCM)
National audience
Mostrar más [+] Menos [-]Does the sensitivity of the soil oragnic matter mineralization to a change of temperature depend on its quality? Texto completo
2011
Lefèvre, Romain | Barré, Pierre | Bardoux, Gérard | Christensen, Bent | Girardin, Cyril | Houot, Sabine | Katterer, Thomas | van Oort, Folkert | Chenu, Claire | Biogéochimie et écologie des milieux continentaux (Bioemco) ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) | Laboratoire de géologie de l'ENS (LGENS) ; Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS-PSL ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) | Aarhus University [Aarhus] | Environnement et Grandes Cultures (EGC) ; Institut National de la Recherche Agronomique (INRA)-AgroParisTech | Departement of Soil and Environment ; Swedish University of Agricultural Sciences = Sveriges lantbruksuniversitet (SLU) | Physicochimie et Ecotoxicologie des SolS d'Agrosystèmes Contaminés (PESSAC) ; Institut National de la Recherche Agronomique (INRA)
absent
Mostrar más [+] Menos [-]What is the chemical nature of stable carbon? Using soils from a long term bare fallow to answer this question Texto completo
2011
Lutfalla, Suzanne | Quenea, Katell | van Oort, Folkert, F. | Chenu, Claire | Biogéochimie et écologie des milieux continentaux (Bioemco) ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS) | Unité de recherche Science du Sol (USS) ; Institut National de la Recherche Agronomique (INRA)
National audience
Mostrar más [+] Menos [-]SOC pools dynamics and stability in the 80 years bare fallow chronosequence at Versailles. Evidence of mineral-associated SOC stabilization Texto completo
2011
Vasilyeva, N. | van Oort, Folkert, F. | Chenu, Claire | Institut National de la Recherche Agronomique (INRA) | Unité de recherche Science du Sol (USS) ; Institut National de la Recherche Agronomique (INRA) | Biogéochimie et écologie des milieux continentaux (Bioemco) ; École normale supérieure - Paris (ENS-PSL) ; Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS)
National audience
Mostrar más [+] Menos [-]Microorganisms in Karsts: a case study in St Anne cave, Belgium
2011
Carnol, Monique | Willems, Luc | Malchair, Sandrine
Microorganisms in Karsts: a case study in St Anne cave, Belgium Texto completo
2011
Carnol, Monique | Willems, Luc | Malchair, Sandrine
Despite the importance of microorganisms as geochemical agents over geological times, their extended metabolic diversity and their essential role in element cycles (i.e. mineral dissolution, precipitation, oxido-reduction processes), microbial community composition and processes as well as their ecological role in karst environments are poorly known. While little was published on cave-dwelling microorganisms until the early 1990s, it is now recognized that microorganisms may mediate many important mineral transformations, originally considered to be inorganic in nature. Indeed, recent evidence (Northup & Lavoie, 2001) proved the implication of microorganisms in karstification through precipitation and dissolution processes, resulting in the deposition of carbonate speleothems, silicates, iron or manganese oxides, sulphur compounds and nitrates and in the breakdown of limestone walls. In this poster, we review some potential processes and signs of microbial activity in caves. We present results of a study on the microbial diversity in the ‘St Anne’ cave, Belgium. We focused on ammonia-oxidizing bacteria (AOB), which are responsible for the first, acidifying step of the nitrification process. Chemical composition of the water, numbers of cultivable bacteria (free and particle-associated bacteria) and the diversity of AOB were studied in waters and sediments of the ‘Chawresse’ (underground river in St Anne), on the cave wall and in the soil aboveground. The use of molecular techniques, based on direct ADN extractions, provide more detailed information on the microbial diversity of an environment, as culture-based techniques retrieve only about 1% of bacterial species present in the environment. Bacterial counts showed that most cultivable bacteria were associated with suspended particles and that their numbers decreased underground. Molecular analyses revealed the presence of AOB in the karst system. Comparison of aboveground and belowground diversity also indicated the possibility of a specific endokarst AOB community. Further research perspectives will be discussed. <br /> <br /> <br />Northup, D.E. and Lavoie, K.H. 2001. Geomicrobiology of caves: A review. Geomicrobiology Journal, 18(3):199-220.
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