史无前例的2022年夏季极端热浪增加了有害的蓝藻细菌的繁荣
Na Li1, Yunlin Zhang2, Yibo Zhang3
1Taihu Laboratory for Lake Ecosystem Research, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Science, Beijing 100049, China; College of Nanjing, University of Chinese Academy of Sciences, Nanjing 211135, China.
The Science of the total environment
|July 6, 2023
概括
热浪通过增加水温和光线可用性,同时降低风速,显著促进有害蓝藻细菌的繁殖. 气候变化加剧了这些情况,突出了减少营养素和改善湖泊管理早期预警系统的需要.
科学领域:
- 环境科学 环境科学
- 临界技术 临界技术
- 气候变化科学 气候变化科学
背景情况:
- 有害的蓝藻细菌的繁殖是一个越来越令人担忧的问题,特别是在肥沃的湖泊.
- 热浪对这些花的具体影响和潜在机制仍然不太清楚.
- 预计全球变暖将增加热浪的频率和强度.
研究的目的:
- 为了研究热浪对台湖有害蓝藻细菌繁殖的影响.
- 为了阐明在热浪事件中驱动蓝藻细菌开花形成的机制.
- 为改善湖泊管理和预警系统提供数据.
主要方法:
- 使用新型地面近距离传感系统 (GBPSs) 持续监测叶绿素-a (Chla).
- 在现场的Chla测量与气象数据 (空气温度,光合作用活性辐射,风速,降雨) 的整合.
- 分析了2022年三次主要夏季热浪期间在44天内收集的数据.
主要成果:
- 记录了三次严重的热浪,最高气温超过38°C.
- 每日Chla度与最大空气温度和光合作用活性辐射 (PAR) 有显著的正相关性.
- 降低风速也与增加的Chla相关,表明促进了蓝藻细菌的生长.
结论:
- 热浪,以高温,强烈的PAR和低风为特征,显著增加了有害的蓝藻细菌的繁殖.
- 这些条件促进了水柱的稳定性,增加了光线的可用性,并刺激了从沉积物中释放出来,推动了花的生长.
- 在未来的气候变化情景下,紧急措施,包括减少营养投入和加强预警系统,对于管理绿化湖中的蓝藻细菌至关重要.
相关概念视频
01:30Bacterial Phylum Cyanobacteria
45
Cyanobacteria are a diverse group of oxygenic, phototrophic bacteria that played a pivotal role in converting Earth’s atmosphere from anoxic to oxygen-rich billions of years ago. They exhibit remarkable morphological diversity, ranging from unicellular forms to filamentous types, with cell sizes varying between 0.5 μm and 100 μm. Cyanobacteria are classified into five groups: Chroococcales (unicellular, dividing by binary fission), Pleurocapsales (unicellular, dividing by...
45
01:50Global Climate Change
24.5K
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.
24.5K
00:46Bioremediation
19.1K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
19.1K
01:36Types of Toxins
1.8K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
1.8K
01:19Homeostatic Imbalances in Body Temperature
158
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
158
01:19Other Algae
48
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
48