Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China.
School of Pharmacy and Biological Sciences, Weifang Medical University, Weifang 261053, China.
Biomolecules. 2019 May 14;9(5):187. doi: 10.3390/biom9050187.
While karst tiankengs have a higher capacity to act as safe havens for biodiversity in changing climates, little is known about their soil microorganisms. To fill this gap, we investigate the distribution and driving factors of the bacterial community in karst tiankeng systems. There is a significant difference in the soil characteristics between the inside and the outside of a karst tiankeng. At the karst tiankeng considered in this study, the bacterial composition, in terms of the operational taxonomic unit (OTU), was found to be significantly different in different soil samples, taken from diverse sampling sites within the collapsed doline or the external area, and showed a high habitat heterogeneity. The dominant phylum abundances vary with the sampling sites and have their own indicator taxa from phylum to genus. Unlike the primary controlling factors of plant diversity, the microclimate (soil moisture and temperature), soil pH, and slope dominated the distribution of the bacterial community in karst tiankeng systems. Our results firstly showed the distribution characteristics of bacterial communities and then revealed the importance of microhabitats in predicting the microbial distribution in karst tiankeng systems.
虽然岩溶天坑在气候变化中为生物多样性提供了更高的避难所，但人们对其土壤微生物知之甚少。为了填补这一空白，我们调查了岩溶天坑系统中细菌群落的分布和驱动因素。岩溶天坑内部和外部的土壤特性存在显著差异。在本研究中考虑的岩溶天坑中，根据操作分类单元（OTU），发现来自塌陷天坑内部或外部不同采样点的不同土壤样本中的细菌组成存在显著差异，表现出高度的生境异质性。优势门的丰度随采样点而变化，从门到属都有自己的指示分类单元。与植物多样性的主要控制因素不同，微气候（土壤湿度和温度）、土壤 pH 值和坡度主导了岩溶天坑系统中细菌群落的分布。我们的研究结果首先展示了细菌群落的分布特征，然后揭示了微生境在预测岩溶天坑系统中微生物分布方面的重要性。
Zotero 插件
