Local extinction and turnover contrasts.

Contrasts (95% credible interval) for the difference in local extinction and turnover probabilities between pairs of years by treatment (C, Control; N, Narrow; and W, wide) in western Washington, USA, 1993 (pre-harvest), 1995–1996, and 2003–2004. Each treatment had 5 experimental units (n = 15). Turnover is the probability that a species selected at random from a treatment at time t is a “new” species. Local-extinction is the probability that a species that occupied a treatment in time t did not occupy the treatment in time t + 1.