摘要
粗木质残体(Coarse woody debris,CWD)是森林生态系统的重要组成部分,包括枯立木、倒木、大枝和树桩等,可为许多物种提供栖息地,是森林和林地恢复的重要考虑因素。在森林生态系统中,CWD代表大量有机质,有助于森林生态系统的碳、氮循环,在全球范围内,森林每年吸收约30%全球人为排放的CO2,因而成为重要的碳汇。CWD作为森林生态系统中一个重要的生态单元,在生产力、养分循环、碳固存、群落更新和生物多样性等方面发挥着重要作用。研究认为,在森林生态系统中留下大量CWD有助于提高森林碳汇强度。在全球气候变化的大背景下,世界森林正在面临大面积非正常死亡的威胁,并在林内形成大量CWD。自然环境因子(烈火和暴风雪等)是造成CWD产生的主要原因,不同森林类型、不同干扰环境CWD会表现出不同特征,对全球可持续发展与经营等方面具有重要意义。从CWD的国内外研究概况及研究热点、形成、来源、分类依据和特征(储量和分解)等方面重点阐述森林生态系统中CWD的研究进展。采用国际上统一的分类标准对CWD进行分类,利于研究结果在全球尺度进行比较,使研究内容纳入统一范畴进行资料整合,完善世界CWD数据库。
Coarse woody debris(CWD)is one of the important components of forest ecosystem,which provides habitat for many species.It is an important consideration for forest and woodland restoration.It includes dead standing tree,fallen wood,large branches and tree stumps and other parts.In the forest ecosystem,CWD represents a large amount of orga nic matter,which contributes to the carbon and nitrogen cycling of the forest ecosystem.Globally,forests absorb about 30%of the world’s man-made emissions of CO_(2)each year,making them an important carbon sink.As an important ecological unit in forest ecosystem,it plays an important role in productivity,nutrient cycling,carbon sequestration,community renewal and biodiversity.It is suggested that the retention of large amounts of CWD in forest ecosystem can improve the intensity of forest carbon sink.Under the background of global climate change,the world’s forests are facing the threat of large-scale unnatural death,and a large amount of CWD is formed in the forests.It is found that natural environmental factors(fire and snowstorm,etc.)are the main causes of CWD,and different forest types and different disturbance environments will show different characteristics of CWD.Increasing the research on CWD is of great significance to global sustainable development and management.This review focuses on the research progress of CWD in forest ecosystems from the aspects of the research situation and hot spots,the formation,source,classification basis and characteristics(reserves and decomposition)of CWD at home and abroad.The classification of CWD with the international unified CWD classification standard is conducive to the comparison of research results,can incorporate the research contents into the unified category of data integration,and improve the world CWD database.
作者
李垚
盛基峰
于美佳
段少荣
叶彦辉
韩艳英
LI Yao;SHENG Jifeng;YU Meijia;DUAN Shaorong;YE Yanhui;HAN Yanying(College of Resources and Environment,Tibet College of Agricultural and Animal Husbandry,Nyingchi 860000,China;Institute of Tibet Plateau Ecology,Tibet College of Agricultural and Animal Husbandry,Nyingchi 860000,China)
出处
《广东农业科学》
CAS
2022年第2期85-92,共8页
Guangdong Agricultural Sciences
基金
国家自然科学基金(31460122)
中央财政支持地方高校改革发展资金-林学学科创新团队建设项目(2020-11)
西藏农牧学院研究生创新计划项目(YJ2021-20)。
