[硫化金属矿水系统中的微生物群体组成和多样性]
Cong-Cong Ding1, Xu-Yan Zhu1, Xing-Qing Zhao1
1School of Environmental Science & Engineering, Changzhou University, Changzhou 213164, China.
Huan jing ke xue= Huanjing kexue
|September 11, 2023
概括
采矿活动显著改变了矿井水系统,影响了重金属污染和微生物群落. 重金属,pH,EC,SO4和COD是影响微生物多样性和结构的关键因素.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 地质化学 地质化学
背景情况:
- 采矿活动引入重金属污染,改变水生环境中的物理化学性质.
- 了解不同污染水平对微生物群落的影响对于评估生态系统健康至关重要.
研究的目的:
- 描述不同类型的矿井水中的重金属污染和物理化学性质.
- 分析微生物群落对采矿区不同污染水平的反应.
- 确定影响矿井水系统中微生物社区结构的关键环境因素.
主要方法:
- 从石山矿区收集和分析各种水类 (废水,漏,池水).
- 重金属含量,物理化学性质和微生物社区结构的比较.
- 统计分析包括PCoA,斯皮尔曼相关性和正规相关性分析 (CCA).
主要成果:
- 在不同水类型和采矿区之间观察到重金属含量,物理化学性质和微生物社区结构的显著差异.
- 采矿,破坏堆和穿衣区表现出最严重的污染.
- 微生物的多样性和丰富性在重金属污染 (DW) 较高的废水中减少.
- 重金属污染,pH值,电导率 (EC),硫酸盐 (SO4^2-) 和化学氧气需求 (COD) 被确定为微生物社区结构的主要驱动因素.
- 蛋白质细菌,Euryarchaeota和Bacteroidetes是矿山水系统中占主导地位的类.
结论:
- 矿山水系统表现出明显的污染特征和受矿业活动影响的微生物社区结构.
- 重金属和物理化学参数等关键环境因素显著影响微生物生态系统的形成.
- 主导的微生物类型在受采矿影响的环境中具有生物修复应用的潜力.
相关概念视频
01:28Microbial Nutrition
57
Organisms exhibit remarkable metabolic diversity, categorized based on how they acquire energy and carbon. These strategies enable survival in various ecological niches and are essential for maintaining energy flow and nutrient cycling within ecosystems.Energy and Carbon SourcesOrganisms are classified as phototrophs or chemotrophs based on energy acquisition. Phototrophs use light as their energy source, while chemotrophs rely on oxidizing chemical compounds. Further differentiation arises...
57
01:17Precipitation and Co-precipitation
1.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.8K
01:20Sulfur Assimilation
38
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
38
01:15Metabolism of Chemolithotrophs
40
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
40
01:27Diversity of Archaea III
32
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
32