Canopy structural heterogeneity drives α and β species-genetic diversity correlations in a Chinese subtropical forest

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外文摘要：Patterns and drivers of species-genetic diversity correlations(SGDCs)have been broadly examined across taxa and ecosystems and greatly deepen our understanding of how biodiversity is maintained.However,few studies have examined the role of canopy structural heterogeneity,which is a defining feature of forests,in shaping SGDCs.Here,we determine what factors contribute to α-and β-species-genetic diversity correlations(i.e.,α-and β-SGDCs)in a Chinese subtropical forest.For this purpose,we used neutral molecular markers to assess genetic variation in almost all adult individuals of the domi-nant tree species,Lithocarpus xylocarpus,across plots in the Ailaoshan National Natural Reserve.We also quantified microhabitat variation by quantifying canopy structure heterogeneity with airborne laser scanning on 201-ha subtropical forest plots.We found that species α-diversity was negatively correlated with genetic α-diversity.Canopy structural heterogeneity was positively correlated with species α-di-versity but negatively correlated with genetic α-diversity.These contrasting effects contributed to the formation of a negative α-SGDC.Further,we found that canopy structural heterogeneity increases speciesα-diversity and decreases genetic α-diversity by reducing the population size of target species.Species β-diversity,in contrast,was positively correlated with genetic β-diversity.Differences in canopy structural heterogeneity between plots had non-linear parallel effects on the two levels of β-diversity,while geographic distance had a relatively weak effect on β-SGDC.Our study indicates that canopy structural heterogeneity simultaneously affects plot-level community species diversity and population genetic diversity,and species and genetic turnover across plots,thus driving α-and β-SGDCs.

外文关键词：

Dominant speciesForest structureLiDARLithocarpus xylocarpusSpecies-genetic diversity correlationSubtropical evergreen broad-leaved forest

作者：

Zhiliang Yao、Xia Pan、Xin Yang、Xiaona Shao、Bin Wang、Yun Deng、Zhiming Zhang、Qiaoming Li、Luxiang Lin

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作者单位：

CAS Key Laboratory of Tropical Forest Ecology,Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunming 650223,Yunnan,China

University of Chinese Academy of Sciences,Beijing 100049,China

School of Ecology and Environment,Hainan University,Haikou 570228,Hainan,China

State Forestry and Grassland Administration Key Laboratory of Silviculture in Downstream Areas of the Yellow River,Mountain Tai Forest Ecosystem Research Station of State Forestry and Grassland Administration,Forestry College of Shandong Agricultural University,Tai'an 271018,Shandong,China

School of Ecology and Environmental Sciences & Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments,Yunnan University,Kunming 650500,Yunnan,China

National Forest Ecosystem Research Station at Xishuangbanna,Mengla 666303,Yunnan,China

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出版年：

2025

DOI：

10.1016/j.pld.2024.08.003

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)

影响因子：0.617

ISSN：2096-2703

年,卷(期)：2025.47(1)