Petty et al. (2010). Landscape indicators and thresholds of stream ecological impairment in an intensively mined appalachian watershed. Journal of the North American Benthological Society, 29(4), 1292-1309. （ざら読み） Mining intensity（M…

Luck (2005) An introduction to ecological thresholds. Biol. Conserv. 124, 299-300. Where community threshold patterns exist, the imminent challenge is to identify the mechanism(s) that underlies these patterns. That is, why does a threshol…