气候变化对暖温带典型森林生态系统结构、生产力的影响

The Influence of Climate Change on the Structure and Productivity of the Typical Forest Ecosystem in the Warm Temperate Zone

目前,由于大气中CO2浓度升高而导致的气候变化已被公认,气候变化势必对森林生态系统产生巨大影响。暖温带森林生态系统树种组成复杂,且不定性因素较多,故采用划分功能型的方法,将中国东部暖温带森林划分为四类功能型。采用"自下而上"的建模方法,以各生态站提供的各树种实测光合数据为基础,耦合林窗模型,来预测气候发生变化后500年内,四类功能型林分生态系统结构、生产力的变化。结果表明:各功能型林分均存在明显的滞后性和不同的适应性。

At present, climate change owing to the increasing of the CO2 concentration has been recognized widely, the climate change must affect the forest ecosystem greatly. Because the tree species in the warm temperate forest ecosystem were abundance and the uncertain factors were more, according to climatic zones, the warm temperate forest in the east of China was divided into 4 functional types. Based on the photosynthetic data provided by some ecologic observation stations, the forest gap model was coupled by the methods of ＂ down to up＂ to predict the change of the ecosystem structure and productivity of the 4 kinds of the functional forests in future 500 years. The results showed that each functional forest exhibited obvious lag characteristics and different acclimation in the ecosystem.