相关实验视频

Updated: Jan 17, 2026

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

Isolation and Analysis of Microbial Communities in Soil, Rhizosphere, and Roots in Perennial Grass Experiments

Published on: July 24, 2018

来自温暖和干燥的草原的土壤微生物群更容易受到干旱压力的影响

Xihang Yang¹, Yong Zhang¹, Xinyue Zhang¹

¹State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, College of Ecology, Lanzhou University, Lanzhou, Gansu, China.

Global change biology

|September 18, 2025

概括

土壤微生物群落在干旱地区失去了干旱抵抗力,特别是细菌和原生虫. 长期的干旱条件削弱了生态系统对干旱的抵抗力,影响了气候变化适应.

科学领域:

生态生态学生态生态学
微生物学微生物学
气候科学气候科学

背景情况:

土壤微生物群落的稳定性对于气候变化下的生态系统功能至关重要.
长期的干旱环境可能会通过适应或减少多样性改变微生物对干旱的抵抗力.

研究的目的:

调查长期干旱和温度如何影响土壤微生物社区对干旱的抵抗力.
了解推动微生物抗干旱能力在环境梯度上的变化的因素.

主要方法:

土壤微生物群 (细菌,真菌,原生体) 在中国草原的3600公里干旱和温度梯度上进行了采样.
评估了微生物群落对实验干旱的复合性耐药性.

主要成果:

微生物抗干旱能力随着干旱和温度的增加而下降,特别是在细菌和原生体中.
降低耐药性与较低的分类学多样性,较大的微生物体型以及在干燥的土壤中转移到寡属性种群相关.

结论:

长期的干旱条件可以减少土壤微生物多样性,改变社区结构,增加对急性干旱的脆弱性.
这些结构性变化可能会侵蚀整个生态系统对气候极端变化加剧的抵抗力.

关键词:

身体的尺寸身体的大小气候梯度的梯度是气候的梯度.抗旱能力抗旱能力抗旱能力生命史策略生命史策略微生物群落中的微生物群落.丰富的财富,丰富的财富.

更多相关视频

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

A CO2 Concentration Gradient Facility for Testing CO2 Enrichment and Soil Effects on Grassland Ecosystem Function

Published on: November 21, 2015

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Linking Predation Risk, Herbivore Physiological Stress and Microbial Decomposition of Plant Litter

Published on: March 12, 2013

相关概念视频

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.

The Soil Ecosystem

The Soil Ecosystem

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:

The Roles of Bacteria and Fungi in Plant Nutrition

The Roles of Bacteria and Fungi in Plant Nutrition

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.

Responses to Salt Stress

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.

Responses to Heat and Cold Stress

Responses to Heat and Cold Stress

Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.