相关实验视频
Updated: Jun 9, 2025

07:37
Resurrection of Dormant Daphnia magna: Protocol and Applications
Published on: January 19, 2018
18.3K
人为地下水温度热点对环境的影响
Maximilian Noethen1, Julia Becher1, Kathrin Menberg2
1Department of Applied Geology, Institute of Geosciences and Geography, Martin Luther University Halle-Wittenberg (MLU), Germany.
The Science of the total environment
|October 23, 2024
概括
来自基础设施的城市热量不会显著改变中欧水层的地下水质量或微生物生活. 即使在23°C,中度热应激也没有对水化学或生态产生影响.
科学领域:
- 环境科学 环境科学
- 水文地质学 水文地质学
- 生态生态学 生态生态学
背景情况:
- 城市基础设施的地下热积累改变了地下水的热条件.
- 浅层地下水生态系统对适应寒冷的动物和微生物至关重要,对温度变化很敏感.
- 人为热源,就像水上公园一样,创造了局部的地下水温度热点.
研究的目的:
- 评估水上公园造成的地下水温度热点 (高达23°C) 对环境的影响.
- 评估浅层地下水对中度热变化的水化和生态反应.
- 为了确定人为热量对地下水质量和微生物群落的影响.
主要方法:
- 在水上公园附近的地下水温度热点的现场评估.
- 将地下水质量和生态特征与保护区的井相比较.
- 在高温下分析水化参数和微生物特性.
主要成果:
- 地下水的质量受到一般人为土地利用的影响,而不是特别受到温度热点的影响.
- 地下水的水化和生态特性都没有显著依赖于温度升高.
- 低氧度 (<1 mg/l) 限制了斯蒂戈动物群的存在,排除了它们作为生物指标的使用.
结论:
- 温和的热应力在这种有氧无毒的水层中不会导致水化学或微生物特性发生显著变化.
- 研究的地下水系统在当前条件下表现出对热变化的弹性.
- 需要对其他含水层类型进行进一步的研究,并对微生物群落组成进行更深入的分析.
相关概念视频
Global Climate Change
24.2K
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.
24.2K
Threats to Biodiversity
22.2K
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...
22.2K
Radiation: Applications
1.1K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.1K
Diversity of Archaea I
2
Archaea, a domain of single-celled microorganisms, are classified into five major phyla based on genetic and biochemical characteristics: Euryarchaeota, Crenarchaeota, Thaumarchaeota, Korarchaeota, and Nanoarchaeota. Among these, the phylum Euryarchaeota is notable for its remarkable diversity in morphology, metabolism, and ecological adaptations.Morphological and Metabolic DiversityMembers of Euryarchaeota exhibit a variety of cellular shapes, including rods and cocci. Their metabolic pathways...
2
Factors Influencing Microbial Growth: Temperature
1
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
Factors Affecting Body Temperature
3.9K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
3.9K

