在偏远的山湖中,生物膜社区的组成正在发生变化,潜在的毒性藻类的相对增加
Hugo Sentenac1, Adeline Loyau1, Luca Zoccarato2
1Laboratoire Ecologie Fonctionnelle et Environnement, CNRS, INPT, UPS, Université de Toulouse, Toulouse, France.
Water research
|September 14, 2023
概括
全球变化正在改变山湖生物膜,转向潜在有害的蓝藻细菌和减少藻的多样性. 这些变化会影响水质,生态系统健康和公共安全.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 山湖生态系统对于饮用水至关重要,对全球变化敏感.
- 地生物膜在维持这些湖泊的水质方面发挥着至关重要的作用.
- 全球变化对山湖生物膜社区的影响仍然不太清楚.
研究的目的:
- 调查全球变化的影响,在普莱尼纳湖的原生生物和微真核生物生物膜社区的组成.
- 在五年时间内分析生物膜社区结构的时间趋势.
- 确定与观察到的社区转变相关的关键环境驱动因素.
主要方法:
- 利用16S和18SrRNA基因的元编码进行社区分析.
- 将生物数据与气候和环境监测数据结合起来.
- 采用时间衰变关系和线性混合模型来评估社区转移和环境协会.
主要成果:
- 从2016年到2020年,观察到 prokaryotic 和 micro-eukaryotic 生物膜社区组成的显著变化.
- 在研究期间,这些社区内的生物多样性下降.
- 发现了蓝藻细菌 (包括潜在的毒性菌类) 的增加和藻丰富度和丰度的减少,与水的pH值和硬度上升有关.
结论:
- 全球变化正在推动山湖盆地生物膜发生重大变化.
- 增加水的pH值和硬度是影响这些变化的关键环境因素.
- 观察到的变化对生态系统的弹性,水质和公共卫生构成风险,原因是有害的蓝藻细菌的潜在增加.
相关概念视频
01:21Green Algae
45
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
45
01:19Other Algae
45
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...
45
01:29Biofilms
53
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
53