More is not always better: peat moss mixtures slightly enhance peatland stability.

Terrestrial wetland ecosystems challenge biodiversity-ecosystem function theory, which generally links high species diversity to stable ecosystem functions. An open question in ecosystem ecology is whether assemblages of co-occurring peat mosses contribute to the stability of peatland ecosystem processes. We conducted a two-species (, ) replacement series mesocosm experiment to evaluate the resistance, resilience, and recovery rates of net ecosystem CO exchange (NEE) under mild and deep water table drawdown.