气候对森林粗木质残体贮量的影响

森林中的粗木质残体（CWD）是生物圈与土壤圈养分配置的中介和纽带，CWD的贮量影响森林中元素的循环。文中通过比较世界各气候带森林系统中CWD的贮量，总结了造成各气候带森林中CWD贮量差异的气候因素。各气候带不同的气温、降水以及气温与降水的时间搭配关系，通过影响森林木材生产力、活立木死亡量及CWD的分解速率，进而影响CWD在林内的贮量。热带雨林、季雨林中CWD的平均贮量最低，仅为19.96～27.71 t/hm2；温带海洋性气候森林中CWD的平均贮量高达205.8～213.2 t/hm2。在全球变暖的大背景下，贮存在CWD中的C元素含量关乎着大气中CO₂含量，故应加强世界各气候带森林中CWD贮量格局的长期监测和系统调研。

The Effect of Climate on Storage of Coarse Woody Debris (CWD) in Forests

Coarse woody debris (CWD) in forest is the mediator and the link of nutrient distribution between pedosphere and biosphere in forest, whose storage affects the cycling of elements in forest ecosystems. This paper summarized the climatic factors that lead to the variation in CWD storage in forests by comparing the CWD storage in forest ecosystems located in several climatic zones. The temperature, precipitation and their temporal collocation are the causes to the varied CWD storage in forests through affecting the timber productivity, the survival rate of living trees and the decomposition rate of woods. CWD average storage in tropical rainforest and tropical monsoon forest is merely 19.96-27.71 t/ha which is the lowest among all the zones. On the contrary,CWD average storage in forest located in temperature marine climate zone is 205.8-213.2 t/ha, which ranks the highest. In the context of global warming, the atmospheric CO₂ concentration depends on the concentration of element C contained in CWD. To this end, the systematic research and long-term monitoring on forest CWD storage under each climate zone should be strengthened.