1. Alexander, S.A., Palmer, C.J. 1999. Forest health monitoring in the United States: Fist four years [J]. Environ Monit Assess,55(2): 267–277.
2. Callicott, J.B. 1992. Aldo Leopold’ Metaphor Ecosystem health: New goals for environmental management [M]. Washington D C: Island Press. p42–56.
3. Callicott, J.B. 2000. Aldo Leopold and the foundations of ecosystem management [J]. J. For.,5: 5–13.
4. Costanza, R. 1992. Toward an operational definition of ecoyystem health. Ecosystem health: New goals for environmental management [M]. Washington, D.C.: Island Press. p239–256.
5. Covington, W.W., Fule, P.Z., Moore, M.M. 1997. Restoring ecosystem health in Ponderosa Pine forests of the Southwest [J]. J. For.,4: 23–29.