The dynamics of soil bacterial community structure in response to yearly repeated agricultural copper treatments.
The annual dynamics of soil bacterial community structure, including early, dose-dependent and transient modifications, was observed consecutively at different levels of copper contamination (high: 48 kg Cu ha(-1), low: 16 kg Cu ha(-1)) repeated yearly over a three-year field experiment. Repeated low-level Cu contamination led to an increase in community stability to metal stress without a long-term shift in the population structure, whereas repeated high-level Cu contamination induced a novel and stable bacterial community structure. Furthermore, field experimentation highlighted that episodic climatic stress can modulate copper impact by enhancing community stability.
Ranjard
Lionel
L
INRA-Université de Bourgogne, UMR Microbiologie du Sol et de l'Environnement, CMSE, 17 rue Sully, Dijon Cedex, France. lionel.ranjard@dijon.inra.fr
Nowak
Virginie
V
Echairi
Abdelwahad
A
Faloya
Vincent
V
Chaussod
Rémi
R
D001419:Bacteria / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification; D003300:Copper / Q000494:pharmacology*; D017753:Ecosystem; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000494:pharmacology
D012987:Soil; D012989:Soil Pollutants; D003300:Copper