气候变化领域集成服务门户

Currently global warming is an inevitable phenomenon and its effects on forests are palpable. In this study, temperature effect on biomass allocation was examined using biomass data for five forest types. Stem, branch, leaf and root biomasses comprised 53-71%, 8-20%, 4-9% and 15-21% of the overall stand biomasses, respectively. Mean values for the root: shoot ratio increased in the order of subtropical montane Cupressus and Sabina forest (SCSF) (0.18) = subtropical Pinus massoniana forest (SPMF) (0.18) < alpine Picea abies forest (APAF) (0.21) < temperate P. tabulaeformis forest (TPTF) (0.25) < temperate typical deciduous broadleaved forest (TDBF) (0.28). Warming significantly enhanced the stem, shoot and forest biomasses in APAF and SPMF, and significantly decreased in TDBF, TPTF and SCSF. With increasing temperature, branch biomass decreased significantly in TDBF and increased significantly in SPMF; leaf biomass decreased significantly in APAF and TDBF and increased significantly in SPMF; root biomass showed a significant increase in APAF and SPMF. The root: shoot ratio decreased significantly in APAF and increased significantly in TPTF and SCSF, but did not change significantly in TDBF and SPMF. Thus, due to warming, the biomass allocation was observed to be changed with forest types.