Neighborhood diversity structure and neighborhood species richness effects differ across life stages in a subtropical natural secondary forest  

作　　者：Haonan Zhang Shuifei Chen Xiao Zheng Xiaomin Ge Yao Li Yanming Fang Peng Cui Hui Ding 

机构地区：[1]Research Center for Nature Conservation and Biodiversity,State Environmental Protection Scientific Observation and Research Station for Ecology and Environment of Wuyi Mountains,State Environmental Protection Key Laboratory on Biosafety,Nanjing Institute of Environmental Sciences,Ministry of Ecology and Environment of China(MEE),Nanjing,210042,China [2]Co-Innovation Center for Sustainable Forestry in Southern China,College of Biology and the Environment,Key Laboratory of State Forestry and Grassland Administration on Subtropical Forest Biodiversity Conservation,Nanjing Forestry University,Nanjing,210037,China

出　　处：《Forest Ecosystems》2022年第6期790-801,共12页森林生态系统（英文版）

基　　金：supported by the Innovative Team Project of Nanjing Institute of Environmental Sciences,MEE;Central Public Welfare Scientific Institution Basal Research Fund,Ministry of Finance and Ministry of Ecology and Environment of China(Nos.GYZX210302,GYZX200203):Biodiversity Survey,Observation and Assessment Program of Ministry of Ecology and Environment of China;The National Environmental Protection Public Welfare Industry Targeted Research Fund:Research and demonstration of key technologies for dynamic supervision of nature reserves(No.201509042);The Special Foundation for National Science and Technology Basic Resources Investigation of China(No.2019FY202300);The Jiangsu Postdoctoral Research Funding Program(No.2021K038A)。

摘　　要：Natural secondary forest has a strong capacity to regrow naturally and recover biodiversity rapidly on abandoned lands.However,at the neighborhood scale,which can truly reflect the facilitative or competitive interactions among individual plants,the local diversity spatial structure in secondary forest and the feedback effects of neighborhood diversity on natural regeneration remain unclear,and this may be the key to properly understand the mechanisms of natural secondary forest species diversity recovery.To this end,this study established a dynamic plot in a rehabilitated secondary forest after disturbance and conducted a comprehensive survey of 68,336 individual plants with repeated measurements at 5-year interval to assess the characteristics of neighborhood diversity structure across life history stages and link the neighborhood species richness(NSR)effect translated by species interactions at species diversity structure with individual trees recruitment/mortality in secondary forest regeneration.The results showed that,compared with tropical and temperate natural forests,a higher proportion of diversity accumulators and a lower proportion of repellers in subtropical secondary forests resulted in neighborhood diversity structures characterized by heterospecific or high-diversity patches,which are beneficial to the maintenance or restoration of biodiversity.As an important supplement to the research on the relationship between diversity and productivity,our findings show a positive diversity-survival relationship in subtropical secondary forests.Importantly,we observed that the neighborhood diversity structure exhibited a trend of accumulator-dominated to neutral-dominant changes with life stage from sapling to adult,which,in turn,determined the direction and strength of NSR effects on recruitment/mortality.Specifically,diverse local neighborhoods at a later successional stage characterized with‘neutral’species-species interactions can act as a‘welfare net’by offering favorable microhabitats for the mo

关 键 词：Secondary forest restoration Individual species area relationship Diversity accumulator species Neighborhood species richness effect Life history stages Heterospecific crowding 

分 类 号：S718.54[农业科学—林学]