摘要
母岩对景观演化和生物定植起着决定性作用,但母岩对区植物多样性是否产生影响是地学、植物学和生态学共同关注的热点。以桂北冠岩、恭城两个典型岩溶区3种母岩(灰岩、碎屑岩、灰岩夹白云岩)天然次生林为研究对象,基于野外调查数据,分析了岩溶区植物alpha和beta多样性特征及影响因素。结果显示:(1)研究区内物种相对丰富,共记录乔木86种、灌木93种、草本56种,灰岩植物alpha多样性最高,碎屑岩次之,灰岩夹白云岩最低;(2)不同母岩和同一母岩区的植物群落相异性均较高,物种周转组分对beta多样性贡献(82.86%—84.49%)显著高于物种丰富度组分(15.51%—17.14%);(3)Pearson和Mantel分析表明,母岩、基岩裸露率和土壤厚度与桂北岩溶区植物alpha和beta多样性显著相关(P<0.05)。综上所述,桂北岩溶森林林分异质性较高,碳酸岩混合沉积区植物多样性显著低于纯灰岩和碎屑岩。植物组成差异主要取决于物种周转过程,母岩、基岩裸露和土壤厚度是主要影响因素。本研究从母岩的角度评估了岩溶森林的植物多样性特征及主要影响因素,为桂北乃至中国西南岩溶地区植被保护和重建提供科学依据和理论支持。
Bedrock plays a crucial role in regulating the process of landscape evolution and biological colonization.Experts in geosciences,botany,and ecology have been interested in understanding how bedrock influences regional plant diversity levels.This research aimed to study the natural secondary forests in two typical karst areas of Guanyan and Gongcheng located in northern Guangxi.The study focused on the forests that grew on three bedrocks namely limestone,clastic rock,and limestone sandwiched with dolomite.By analyzing the field-measured data of the sample plot,the study aimed to identify the plant diversity characteristics,both alpha and beta,and the environmental factors that influence them in the karst area.The research results showed that:(1)The study area recorded 86 trees,93 shrubs,and 56 herbs,revealing a relatively affluent species count.The plant alpha diversity was observed to have a noticeable variation across different types of bedrock.The research findings indicate that the highest plant diversity was found on limestone bedrock,hosting a rich and diverse range of plant species,while clastic rock also displayed a significant level of plant diversity.However,the lowest plant diversity was recorded on limestone bedrocks sandwiched with dolomite.(2)The plant communities in different and same bedrock areas showed a considerable difference in their composition.The variation in the beta diversity was significantly influenced by the species turnover component,which accounted for 82.86%to 84.49%of the beta diversity,rather than the species richness component,which accounted for only 15.51%to 17.14%.(3)The statistical analysis conducted using the Pearson correlation and Mantel test methods indicated that bedrock,bedrock exposure rate,and soil thickness significantly correlated with plant composition and diversity in the study area(P<0.05).To summarize,the karst forests located in Northern Guangxi exhibit a high degree of heterogeneity.It has been observed that plant richness in carbonate-mixed sediments is signi
作者
钟萍
王光军
刘绍华
徐永福
罗为群
ZHONG Ping;WANG Guanngjun;LIU Shaohua;XU Yongfu;LUO Weiqun(International Research Centre on Karst under the Auspices of UNESCO,Key Laboratory of Karst Dynamics,MNR/GZAR,Institute of Karst Geology,CAGS,Guilin 541004,China;Pingguo Guangxi,Karst Ecosystem,National Observation and Research Station/Pingguo Baise,Karst Ecosystem,Guangxi Observation and Research Station,Pingguo 531406,China;College of Life Science and Technology,Central South University of Forestry&Technology,Changsha 410004,China;National Engineering Laboratory for Applied Technology of Forestry&Ecology in South China,Changsha 410004,China;College of Forestry,Central South University of Forestry&Technology,Changsha 410004,China)
出处
《生态学报》
CAS
CSCD
北大核心
2024年第7期3016-3026,共11页
Acta Ecologica Sinica
基金
中国地质调查项目“南方石漠化重点区综合地质调查与评价”(DD20190502)
广西科技计划项目(桂科AB21220026)。
关键词
岩溶区
母岩
基岩裸露率
土壤厚度
植物多样性
karst area
bedrock
bedrock exposure rate
soil thickness
plant diversity
