土地利用模式对中国黄土高原土壤微生物多样性和组成的影响

IF 2.7 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Jian Zhang, Xiaoqun Guo, Yujie Shan, Xin Lu, Jianjun Cao
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引用次数: 0

摘要

在中国黄土高原,土地利用模式是控制潜在生物过程的主要因素。此外,伴随着土地利用格局的变化,废弃土地也可能对土壤微生物产生影响。然而,有关土地利用模式对该地区土壤微生物多样性和群落影响的研究却十分有限。本研究旨在利用高通量脱氧核糖核酸(DNA)测序技术研究不同土地利用模式(杏树地、苹果树地、桃树地、玉米地和废弃地)下的土壤微生物群落多样性和组成。结果表明,除香农指数外,废弃土地和其他土地利用模式下的细菌α-多样性和β-多样性存在显著差异(P<0.050)。放线菌群(34.90%)、变形菌群(20.65%)和子囊菌群(77.42%)的相对丰度在不同土地利用模式的土壤中存在差异。土壤酸碱度对土壤细菌群落的组成有主要影响,而土壤可利用磷则是影响土壤真菌群落组成的主要因素。这些发现表明,土地利用模式的变化导致了土壤性质的改变,进而影响了黄土高原微生物群落的多样性和结构。鉴于土壤与微生物群落之间的密切相互依存关系,当务之急是对废弃土地进行复垦,以保持土壤肥力并维持其功能,这将对生态服务产生重大影响,尤其是对生态脆弱地区的土壤保护。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of land-use patterns on soil microbial diversity and composition in the Loess Plateau, China

In the Loess Plateau of China, land-use pattern is a major factor in controlling underlying biological processes. Additionally, the process of land-use pattern was accompanied by abandoned lands, potentially impacting soil microbe. However, limited researches were conducted to study the impacts of land-use patterns on the diversity and community of soil microorganisms in this area. The study aimed to investigate soil microbial community diversity and composition using high-throughput deoxyribonucleic acid (DNA) sequencing under different land-use patterns (apricot tree land, apple tree land, peach tree land, corn land, and abandoned land). The results showed a substantial difference (P<0.050) in bacterial alpha-diversity and beta-diversity between abandoned land and other land-use patterns, with the exception of Shannon index. While fungal beta-diversity was not considerably impacted by land-use patterns, fungal alpha-diversity indices varied significantly The relative abundance of Actinobacteriota (34.90%), Proteobacteria (20.65%), and Ascomycota (77.42%) varied in soils with different land-use patterns. Soil pH exerted a dominant impact on the soil bacterial communities’ composition, whereas soil available phosphorus was the main factor shaping the soil fungal communities’ composition. These findings suggest that variations in land-use pattern had resulted in changes to soil properties, subsequently impacting diversity and structure of microbial community in the Loess Plateau. Given the strong interdependence between soil and its microbiota, it is imperative to reclaim abandoned lands to maintain soil fertility and sustain its function, which will have significant ecological service implications, particularly with regards to soil conservation in ecologically vulnerable areas.

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来源期刊
Journal of Arid Land
Journal of Arid Land ENVIRONMENTAL SCIENCES-
CiteScore
4.70
自引率
6.70%
发文量
768
审稿时长
3.2 months
期刊介绍: The Journal of Arid Land is an international peer-reviewed journal co-sponsored by Xinjiang Institute of Ecology and Geography, the Chinese Academy of Sciences and Science Press. It aims to meet the needs of researchers, students and practitioners in sustainable development and eco-environmental management, focusing on the arid and semi-arid lands in Central Asia and the world at large. The Journal covers such topics as the dynamics of natural resources (including water, soil and land, organism and climate), the security and sustainable development of natural resources, and the environment and the ecology in arid and semi-arid lands, especially in Central Asia. Coverage also includes interactions between the atmosphere, hydrosphere, biosphere, and lithosphere, and the relationship between these natural processes and human activities. Also discussed are patterns of geography, ecology and environment; ecological improvement and environmental protection; and regional responses and feedback mechanisms to global change. The Journal of Arid Land also presents reviews, brief communications, trends and book reviews of work on these topics.
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