土地利用转型增加了网络复杂性和土壤微生物群落在温带草原中的稳定性
Carolyn R Cornell1,2,3, Ya Zhang1,2, Daliang Ning1,2
1Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, USA.
The ISME journal
|October 13, 2023
概括
农业用地使用增加了土壤微生物网络的复杂性和稳定性,尽管减少了生物多样性. 这种适应可以支持在干扰下生态系统的功能.
科学领域:
- 土壤微生物学 土壤微生物学
- 生态生态学 生态生态学
- 农业科学 农业科学
背景情况:
- 土壤微生物群落对于土壤健康至关重要.
- 农业诱导的土地利用变化对生态系统过程产生负面影响.
- 微生物社区对土地利用转换的反应仍然不太了解.
研究的目的:
- 研究长期作物种植对土壤微生物网络复杂性和稳定性的影响.
- 了解土地使用转换如何随着时间的推移改变微生物相互作用网络.
主要方法:
- 在19个月内对土壤微生物社区网络的分析.
- 传统耕种 (CT) 耕地与本土高草草原的比较.
- 网络复杂性指数 (例如连接性,模块化) 和稳定性的量化.
主要成果:
- CT耕地显示微生物生物多样性减少,但网络复杂性增加 (连接性,连接性,集群性,模块化,枢纽物种).
- 在CT耕地中的微生物网络表现出更大的时间变化复杂性.
- 在CT耕地下的网络变得更加坚固,不那么脆弱,提高了整体稳定性.
- 网络复杂性和稳定性之间的联系通过土地利用转换得到了加强.
- 在CT耕地中,网络结构与环境因素之间的关系较少,与管理障碍的相关性更大.
结论:
- 农业干扰,就像传统的耕作一样,可以增加土壤微生物相互作用网络的复杂性和稳定性.
- 这种复杂性和稳定性的增加可能是生物多样性丧失的权衡,有助于在频繁的农业干扰下维持生态系统功能.
- 管理实践显著影响土壤微生物网络的结构和功能.
相关概念视频
The Roles of Bacteria and Fungi in Plant Nutrition
35.8K
Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
35.8K
The Soil Ecosystem
20.2K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
20.2K
Environmental Applications of Microorganisms
32
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
32
Overview of Nitrogen Metabolism
8.1K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
8.1K
Threats to Biodiversity
22.4K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.4K


