首页|Different mechanisms underlie similar species-area relationships in two tropical archipelagoes

Different mechanisms underlie similar species-area relationships in two tropical archipelagoes

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Despite much research in the field of island biogeography,mechanisms regulating insular diversity remain elusive.Here,we aim to explore mechanisms underlying plant species-area relationships in two tropical archipelagoes in the South China Sea.We found positive plant species-area relationships for both coral and continental archipelagoes.However,our results showed that different mechanisms contributed to similar plant species-area relationships between the two archipelagoes.For coral islands,soil nutrients and spatial distance among communities played major roles in shaping plant community structure and species diversity.By contrast,the direct effect of island area,and to a lesser extent,soil nutrients determined plant species richness on continental islands.Intriguingly,increasing soil nutrients avail-ability(N,P,K)had opposite effects on plant diversity between the two archipelagoes.In summary,the habitat quality effect and dispersal limitation are important for regulating plant diversity on coral islands,whereas the passive sampling effect,and to a lesser extent,the habitat quality effect are important for regulating plant diversity on continental islands.More generally,our findings indicate that island plant species-area relationships are outcomes of the interplay of both niche and neutral processes,but the driving mechanisms behind these relationships depends on the type of islands.

Coral and continental islandsPlant diversitySoil nutrientsSpecies-area relationshipsThe sampling effect

Shengchun Li、Tieyao Tu、Shaopeng Li、Xian Yang、Yong Zheng、Liang-Dong Guo、Dianxiang Zhang、Lin Jiang

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Key Laboratory of Plant Resources Conservation and Sustainable Utilization,South China Botanical Garden,Chinese Academy of Sciences,Guangzhou 510650,China

ECNU-Alberta Joint Lab for Biodiversity Study,Tiantong Forest Ecosystem National Observation and Research Station,School of Ecological and Environmental Sciences,East China Normal University,Shanghai 200241,China

School of Biological Sciences,Georgia Institute of Technology,Atlanta,GA 30332,USA

Jiangxi Academy of Forestry,Nanchang 330032,China

Institute of Eco-Chongming(IEC),Shanghai 202162,China

State Key Laboratory of Biocontrol,School of Ecology,Sun Yat-sen University,Guangzhou 510275,China

School of Geographical Sciences,Fujian Normal University,Fuzhou 350007,China

State Key Laboratory of Mycology,Institute of Microbiology,Chinese Academy of Sciences,Beijing 100101,China

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国家重点研发计划Science and Technology Basic Works Program of the Ministry of Science and Technology of ChinaGuangdong Provincial Special Fund for Natural Resource Affairs on Ecology and Forestry Construction国家自然科学基金National Science Foundation of USANational Science Foundation of USA

2021YFC31004052013FY111200GDZZDC2022870432070222DEB-1342754DEB-1856318

2024

10.1016/j.pld.2023.08.006

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(2)
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