水文特性预测了河流中循环甲和的微生物群落的组成
Dave R Clark1,2, Boyd A McKew3, Andrew Binley4
1School of Life Sciences, University of Essex, Wivenhoe Park, Colchester, Essex, CO4 3SQ, UK. david.clark@essex.ac.uk.
ISME communications
|November 8, 2023
概括
河床微生物群落及其碳 (C) 和 (N) 循环功能的预测是根据地下水对河流的贡献 (基本流量指数;BFI). 这一发现有助于将微生物生态从局部水平扩展到采集区水平.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 河流生态 河流生态
背景情况:
- 沉积物微生物群落对于河流的生物地球化学循环 (碳和) 是至关重要的.
- 微生物群落结构受到当地环境因素的影响,但水域规模的驱动因素仍然不太了解.
研究的目的:
- 为了确定决定微生物群落结构的因素,在捕获范围的规模.
- 调查地下水对河流流量和微生物功能组的贡献之间的关系.
主要方法:
- 研究了9条英国河流沿着基本流量指数 (BFI) 梯度 (0.230.95).
- 量化微生物社区结构和多样性.
- 分析了氨基 monooxygenase 基因的 DNA 序列 (GC 含量,编码子使用) 和氨基酸特性 (疏水性,净电荷).
主要成果:
- 基本流量指数 (BFI) 显著预测了参与碳 (C) 和 (N) 循环的微生物功能组的结构和多样性.
- GC含量,代使用偏差和氨基酸特性与BFI有很强的相关性,这表明生理适应于沉积物类型.
- 地下水的贡献影响微生物适应河床沉积物结构.
结论:
- 地下水对河流流量 (BFI) 的贡献是微生物社区结构和功能在流域规模的关键决定因素.
- 这些发现有助于解决微生物生态学中的"尺度悖论",使生物地质化学理解的扩大成为可能.
- 这项研究为在更大的空间尺度上理解微生物生物地质化学提供了一个框架.
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