【摘要】 通过对我国长白山自然保护区红松针阔混交林和美国Andrews试验林异叶铁杉林的林木死亡量、粗死木质物（CWD）贮量、分解速率和它们在生态系统养分循环等方面动态研究表明,CWD是温带天然林生态系统的重要组成部分,它们在生态系统功能方面的重要性,因森林类型的不同而不尽相同,CWD在针叶林中比针阔混交林中更为重要。CWD在生态系统养分循环中的一个重要作用,很可能在于系统遭受重大外界扰动后,起到贮藏养分,增加系统稳定性的作用。未来全球森林凋落物C贮量估测时,应该包括CWD,否则将低估全球森林凋落物C贮量2.0—16×10¹³kg,系统相对误差达2—10％。更多还原

【Abstract】 In this paper, tree mortality, coarse woody debris（CWD）storage, its decomposition rate and role in nutrient cyclings in two temperate forest ecosystems of Changbai Mountain Natural Reserve of China and Andrews Experimental Forests of USA were studied. Resuits show that CWD is an important component in temperate natural forest ecosystems. Its functional importance varies with forest types and decreases from coniferous forest to mixed forest. A primary role of CWD in nutrient cyclings within forest may be to retain nutrients and stabilize ecosystem following major natural disturbances. Global estimation of carbon stored in detritus should include CWD in future, otherwise, it is possible to underestimate 2—16×10¹³kg of global carbon storage in forest detritus, or relative error in system is 2—10％.更多还原