0000000001247808
AUTHOR
Mélanie Bressan
Effect of primary mild stresses on resilience and resistance of the nitrate reducer community to a subsequent severe stress
International audience; The factors regulating soil microbial stability (e.g. resistance and resilience) are poorly understood, even though microorganisms are essential for ecosystem functioning. In this study, we tested whether a functional microbial community subjected to different primary mild stresses was equally resistant or resilient to a subsequent severe stress. The nitrate reducers were selected as model community and analysed in terms of nitrate reduction rates and genetic structure by narG PCR-restriction fragment length polymorphism fingerprinting. Heat, copper and atrazine were used as primary stresses and mercury at a high concentration as a severe stress. None of the primary …
Response of soil bacterial community structure to successive perturbations of different types and intensities
SummaryIn soil, genetic structure modifications of indigenousbacterial community consecutively to a severe stress(mercury contamination) were delayed when thecommunity was pre-exposed to various minor per-turbations (heat, copper and atrazine). Such minorperturbations induced transitory community struc-ture modifications leading to an increase of commu-nity stability towards a severe mercury stress. Theseresults illustrated well the short-term pre-adaptationprocess for bacterial community hypothesizing thatcommunity submitted to perturbations become moreresistant to withstand another stress. Compared with other environmental matrices of the bio-sphere, soils are considered as the main reservo…
Potential for the introduction of soybean into crop rotations in the Normandy region
Europe is looking for alternatives for soybean importations and needs more local production of protein crops to meet the growing demand for proteins both for feed and food. One strategy to meet this demand could be to expand the soybean production areas (Karges et al, 2022). However, some preliminary information is required before starting producing a new crop. Firstly, farmers lack technical and economic references such as adapted technical management or potential yield but also the impact on gross margin of crop rotation. Then advisors, also needs similar information when working with farmers. Finally, collectors may need the potential total volume potentially produced in a given area to …