Organic Matter Accumulation in the Forest Floors of Forest Ecosystems in Taiwan-soil analysis

Organic matter accumulation in the forest floors is important for carbon and nutrient storage and cycling in forest ecosystems. In the winter of 2001, forest floors were sampled in 7 major forest types of mountainous areas of Taiwan: Taiwan red pine, Taiwania, China-fir, Crptomeria, Taiwan red cypress, natural broad-leaved and coniferous forests. Results shows that organic matter accumulation of these 7 forest types increased with an increase in elevation, except the O2 layers of Taiwania and O1 layers of natural coniferous forests which showed an opposite trend. Adding stand age to the regression equations increased the predictive capability of the regression equations based on elevation only. The regression equations developed in this study can be used along with the tree aboveground biomass derived from forest timber surveys to estimate the regional forest aboveground biomass and carbon accumulation in Taiwan.

森林地表有机质积累对于森林生态系统的碳与养分储存及循环具有关键意义。2001年冬季，研究人员在台湾山区的7种主要森林类型中采集森林地表样品，涉及的森林类型包括：台湾红松（Taiwan red pine）、台湾杉（Taiwania）、杉木（China-fir）、Crptomeria、台湾红桧（Taiwan red cypress）以及天然阔叶与针叶林（natural broad-leaved and coniferous forests）。研究结果表明，除台湾杉的O2层与天然针叶林的O1层呈现相反变化趋势外，其余7种森林类型的有机质积累量均随海拔升高而增加。在仅以海拔为自变量的回归方程中加入林分年龄变量，可有效提升模型的预测性能。本研究构建的回归方程可结合森林资源调查获取的林木地上生物量，用于估算台湾区域尺度的森林地上生物量与碳积累量。