低地地下社区在不同季节的极端热量下不太稳定
Gerard Martínez-De León1, Ludovico Formenti1, Jörg-Alfred Salamon2
1Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.
Ecology letters
|October 3, 2025
概括
极端高温事件会根据海拔和季节对土壤生态系统产生不同的影响. 低海拔土壤无脊椎动物 (Collembola) 和真菌表现出多样化的抵抗力和恢复力,揭示了气候变化的脆弱性.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 土壤科学 土壤科学
背景情况:
- 对气候极端现象的生态反应取决于环境.
- 了解土壤生物群对热量的反应对于预测生态系统稳定性至关重要.
研究的目的:
- 调查土壤社区 (Collembola和真菌) 对模拟极端高温事件的反应.
- 检查海拔和季节对抵抗和恢复的影响.
- 评估热量对生态网络结构的影响.
主要方法:
- 实验室实验模拟360个土壤核心的1周热量事件.
- 从不同季节 (春季,夏季,秋季) 的高海拔和低海拔地点收集.
- 测量了Collembola和真菌群落的耐药性和恢复;分析了生态网络.
主要成果:
- 低海拔的科伦博拉在春季和夏季对热量的抵抗性降低,主要在春季土壤中恢复.
- 菌群体通常稳定,但在夏季高温事件发生后,病原体的相对丰度增加.
- 网络分析表明Collembola和真菌热后压力之间的负面关联增加.
结论:
- 极端高温事件可以破坏和重组土壤生态社区.
- 高度和季节性是影响热量影响时空环境的关键因素.
- 这些发现凸显了特定土壤生物群对极端气候变化的脆弱性.
相关概念视频
Responses to Heat and Cold Stress
14.7K
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.
14.7K
What is Climate?
20.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
20.4K
Global Climate Change
28.7K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
28.7K
Diversity of Archaea IV
409
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
409
Factors Influencing Microbial Growth: Temperature
1.1K
Microorganisms display remarkable adaptations, enabling them to thrive in diverse ecological niches across a wide range of temperatures. Temperature profoundly influences microbial growth by affecting enzymatic activity, membrane fluidity, and other cellular processes.Each microorganism operates within a specific temperature range defined by three cardinal points: minimum, optimum, and maximum. Below the minimum temperature, membranes lose fluidity, halting transport processes. Above the...
1.1K
Trophic Efficiency
25.0K
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
25.0K


