Overstory functional groups indicate the legacy of land use in a secondary tropical forest in southwestern China

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外文摘要：Anthropogenic disturbances are widespread in tropical forests and influence the species composition in the overstory.However,the impacts of historical disturbance on tropical forest overstory recovery are unclear due to a lack of disturbance data,and previous studies have focused on understory species.In this study,the purpose was to deter-mine the influence of historical disturbance on the diver-sity,composition and regeneration of overstory species in present forests.In the 20-ha Xishuangbanna tropical sea-sonal rainforest dynamics plot in southwestern China,the historical disturbance boundaries were delineated based on panchromatic photographs from 1965.Factors that drove species clustering in the overstory layer(DBH ≥ 40 cm)were analyzed and the abundance,richness and composition of these species were compared among different tree groups based on multiple regression tree analysis.The coefficient of variation of the brightness value in historical panchro-matic photographs from 1965 was the primary driver of spe-cies clustering in the overstory layer.The abundance and richness of overstory species throughout the regeneration process were similar,but species composition was always different.Although the proportion of large-seeded and vigorous-sprouting species showed no significant differ-ence between disturbed and undisturbed forests in the tree-let layer(DBH＜20 cm),the difference became significant when DBH increased.The findings highlight that historical disturbances have strong legacy effects on functional group composition in the overstory and the recovery of overstory species was multidimensional.Functional group composi-tion can better indicate the dynamics of overstory species replacement during secondary succession.

外文关键词：

Historical disturbanceLegacy effectsSecondary forestsOverstory speciesFunctional groups

作者：

Yun Deng、Wenfu Zhang、Min Cao、Jinlong Dong、Hui Chen、Xiaobao Deng、Jiajia Liu、Xiaoyang Song、Shangwen Xia、Liqing Sha、Shengdong Yuan、Luxiang Lin、Tao Xu

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作者单位：

CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,People's Republic of China

Center for Plant Ecology,Core Botanical Gardens,Chinese Academy of Sciences,Mengla 666303,People's Republic of China

National Forest Ecosystem Research Station at Xishuangbanna,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Mengla 666303,People's Republic of China

Department of Life Sciences,University of Chinese Academy of Sciences,B

Department of Life Sciences,Fudan University,Shanghai 570228,People's Republic of China

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基金：

Natural Science Foundation of Yunnan ProvinceOpen Fund of the Key Laboratory of Tropical Forest Ecology,Chinese Academy of Sciences,National Science Foundation of ChinaJoint Fund of the National Natural Science Foundation of China-Yunnan ProvinceField Station Foundation of the Chinese Academy of Sciences

项目编号：

202301AT07035632061123003U1902203

出版年：

2024

DOI：

10.1007/s11676-024-01729-3

林业研究(英文版)

东北林业大学,中国生态学学会

林业研究(英文版)

CSTPCDEI

影响因子：0.365

ISSN：1007-662X

年,卷(期)：2024.35(5)