Incorrect addresses were published for the authors R. J. Long and J. P. Lassoie. The correct addresses are:
R. J. Long: International Centre for Tibetan Plateau Ecosystem Management, Lanzhou University, 730000, Lanzhou, China.
J. P. Lassoie: Department of Natural Resource, Cornell University, New York 14853 3001, USA.
The Press apologise to the authors and readers for this mistake.