| 土地利用方式对岩溶断陷盆地土壤细菌和真核生物群落结构的影响 |
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| 引用本文： | 李强.土地利用方式对岩溶断陷盆地土壤细菌和真核生物群落结构的影响[J].地球学报,2021,42(3):417-425. |
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| 作者姓名： | 李强 |
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| 作者单位： | 自然资源部/广西岩溶动力学重点实验室, 中国地质科学院岩溶地质研究所;联合国教科文组织国际岩溶研究中心 |
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| 基金项目： | 国家重点研发计划课题(编号: 2016YFC0502501);中国地质科学院基本业务费(编号: 2020022) |
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| 摘 要： | 土壤生物是土壤生态系统的重要组成部分,在生态系统物质循环和能量转化中占有重要的地位.为揭示土地利用方式对岩溶断陷盆地土壤生物的影响,在获取土壤理化性质及碳氮磷化学计量学特征的基础上,利用16S rRNA和18S rRNA高通量测序技术研究了弃耕地、草地、人工林和天然林等土壤细菌与真核生物的群落结构.C:N、C:P和N:P比变化规律为弃耕地<草地<人工林<天然林,土壤细菌和真核生物α多样性、互作网络表现出相反的变化规律.土壤磷、钾和钙是影响岩溶断陷盆地土壤细菌和真核生物群落结构和多样性的关键因素.RB41是决定岩溶断陷盆地土壤细菌-真核生物网络系统的关键类群.本研究结果为利用土壤生物进行石漠化治理及岩溶生态修复提供了理论基础.
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| 关 键 词： | 岩溶断陷盆地 土地利用方式 细菌 真核生物 互作网络 |
Land-use Types Leading to Distinct Ecological Patterns of Soil Bacterial and Eukaryota Communities in Karst Graben Basin |
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| LI Qiang.Land-use Types Leading to Distinct Ecological Patterns of Soil Bacterial and Eukaryota Communities in Karst Graben Basin[J].Acta Geoscientia Sinica,2021,42(3):417-425. |
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| Authors: | LI Qiang |
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| Institution: | Key Laboratory of Karst Dynamics, MNR & GZAR, Institute of Karst Geology, Chinese Academy of Geological Sciences;International Research Center on Karst under the Auspices of UNESCO |
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| Abstract: | Soil organism is an important part of soil ecosystem and plays an important role in material cycle and energy transformation of soil ecosystem. In order to reveal the influence of land use on soil organisms in karst graben basin, the authors studied soil bacteria and eukaryotes from abandoned farmland, grassland, artificial forest and natural forest by using 16S rRNA and 18S rRNA high-throughput sequencing technology coupled with soil physical-chemical properties and soil stoichiometry characteristics of carbon, nitrogen and phosphorus. The change rule of C: N, C: P and N: P ratio was in order of abandoned farmland < grassland < artificial forest < natural forest, and the diversity and co-occurrence of soil bacteria and eukaryote showed opposite change rule. Soil P, K and Ca are the key factors affecting the community structure and diversity of soil bacteria and eukaryotes in the karst graben basin. RB41 is the key group of soil organism in karst graben basin. The results of this study provide a theoretical basis for rocky desertification control and karst ecological restoration. |
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| Keywords: | karst graben basin land-use type bacteria eukaryota co-occurrence |
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