Do soil bacterial communities respond differently to abrupt or gradual additions of copper?

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McTee, M., Bullington, L., Rillig, M. C., & Ramsey, P. W.   (2019).  Do soil bacterial communities respond differently to abrupt or gradual additions of copper? .  FEMS Microbiology Ecology  95(1), fiy212. https://doi.org/10.1093/femsec/fiy212.