This study was supported by the State Key Basic Research Project (Grant No. 2002CB412502); the Innovation Study Key Project of the Chinese Academy of Sciences (Grant No. KZCX1-SW-01- 01); the Young Scientist Project of National Natural Sci-ences Foundation (Grant No. 30500079); the Key Pro-ject of National Natural Sciences Foundation (Grant No.90411020).
Long-term measurement of carbon metabolism of old-growth forests is critical to predict their behaviors and to reduce the uncertainties of carbon accounting under changing climate. Eddy covariance technology was appli...