首页|An unprotected vulnerable relict subtropical conifer—Keteleeria evelyniana:Its forests,populations,growth and endangerment by invasive alien plant species in China

An unprotected vulnerable relict subtropical conifer—Keteleeria evelyniana:Its forests,populations,growth and endangerment by invasive alien plant species in China

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Relict subtropical coniferous forests in China face severe fragmentation,resulting in declining pop-ulations,and some are under significant threat from invasive alien species.Despite the crucial impor-tance of understanding forest dynamics,knowledge gaps persist,particularly regarding the impact of invasive plants on vulnerable natives like Keteleeria evelyniana.In this study,we investigated the impact of invasive plants on the regeneration of forests dominated by K.evelyniana,a subtropical relict species in southwestern China.For this purpose,we characterized forest dynamics of 160 forest plots featuring K.evelyniana as the primary dominant species and determined whether the presence of invasive plants was correlated with regeneration of K.evelyniana.We identified four distinct forest types in which K.evelyniana was dominant.We found that radial growth of K.evelyniana trees is faster in younger age-classes today than it was for older trees at the same age.The population structure of K.evelyniana in each forest type exhibited a multimodal age-class distribution.However,three forest types lacked established saplings younger than 10 years old,a situation attributed to the dense coverage of the invasive alien Ageratina adenophora.This invasive species resulted in a reduction of understory species diversity.Additionally,our analysis uncovered a significant negative correlation in phylogenetic relatedness(net relatedness index)between native and invasive alien plant species in eastern Yunnan.This suggests closely related invasive species face heightened competition,hindering successful invasion.Taken together,our findings indicate that successful establishment and habitat restoration of K.evelyniana seedling/saplings require effective measures to control invasive plants.

Keteleeria evelynianaAge structureRegenerationSpecies diversityInvasive alien speciesPhylogenetic relatedness

Cindy Q.Tang、Min-Rui Du、Huan-Chong Wang、You-Cai Shi、Jia-Le Zeng、Shu-Li Xiao、Peng-Bin Han、Jian-Ran Wen、Shi-Qian Yao、Ming-Chun Peng、Chong-Yun Wang、Yong-Ping Li、Jordi López-Pujol

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Institute of Ecology and Geobotany,College of Ecology and Environmental Science,Yunnan University,Building #3,Guozhong Dalou,Dongwaihuan South Road,University Town,Chenggong New District,Kunming 650504,Yunnan,China

College of Life Sciences,Yunnan University,Shengming Kexueyuan Building #2,Chenggong Campus,Dongwaihuan South Road,University Town,Chenggong New District,Kunming 650504,Yunnan,China

College of Natural Resources,Yunnan University,Chenggong Campus,Dongwaihuan South Road,University Town,Chenggong New District Kunming 650504,Yunnan,China

Botanic Institute of Barcelona(IBB,CSIC-CMCNC),Passeig del Migdia s/n,Barcelona 08038,Catalonia,Spain

Escuela de Ciencias Ambientales,Universidad Espíritu Santo(UEES),Samborondón 091650,Ecuador

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2024

10.1016/j.pld.2024.02.006

植物多样性(英文)
中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD
影响因子：0.617
ISSN：2096-2703
年,卷(期)：2024.46(5)