文献类型：期刊文献

英文题名：Species diversity patterns differ by life stages in a pine-oak mixed forest

作者：Li, Yuanfa[1,2] Ye, Shaoming[1] Bai, Weiguo[3] Zhang, Gongqiao[4]

第一作者：Li, Yuanfa

通信作者：Zhang, GQ[1]

机构：[1]Guangxi Univ, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Peoples R China;[2]Laibin Jinxiu Dayaoshan Forest Ecosyst Observat &, 95 Gongde Rd, Laibin 545700, Guangxi, Peoples R China;[3]Guangxi Zhuang Auton Reg Dongmen State Owned Fore, Jinlong Rd 10, Chongzuo 532199, Guangxi, Peoples R China;[4]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat, Natl Forestry & Grassland Adm, Xiangshan Rd, Beijing 100091, Peoples R China

年份：2022

卷号：88

起止页码：138-149

外文期刊名：DENDROBIOLOGY

收录：;Scopus(收录号：2-s2.0-85145242034);WOS:【SCI-EXPANDED(收录号:WOS:000911391600010)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant No. 32060340) and Scientific Research Capacity Building Project for Laibin Jinxiu Dayaoshan Forest Ecosystem Observation and Research Station of Guangxi (Grant No. 22-035-130-01).

语种：英文

外文关键词：Biodiversity; life stage; scale effect; secondary forest; spatial distribution

摘要：Natural forests comprise trees of different species and sizes, constituting a "biotic framework". Although examinations of diversity patterns at various spatial scales are frequently conducted, life stages are rarely accounted for. Pine-oak mixedwood forest is widely distributed around the world and constitutes main forest type in the Nanpan River Basin in southwest China. We established a fixed plot with an area of 100 m x 100 m in an undisturbed forest stand and classified trees according to five life stages based on their diameter at breast height (DBH) and height. Then, we calculated eight traditional diversity indices for each life stage. We found that species richness (R), abundance (N), and three diversity indices first increased and then decreased with increasing life stage. As sampling area increased, R, the Shannon-Wiener index (H') and Simpson's diversity index (D) first increased quickly, followed by a reduced rate of increase, whereas N showed a linear increase and three evenness indices showed gradual decreases. Global Moran's I values for each diversity index were small, indicating weak spatial autocorrelation. Both R and N of shrubs and saplings decreased sharply with life stage, with only large trees comprising the later life stages. Our results indicate that species diversity patterns in pine-oak forests, particularly in early successional stages, differ among life stages. The changes contribute to the understanding and conservation of forest biodiversity.