Microbial Community Composition and Ecology of an Acidic Aquatic Environment: The Tinto River, Spain
Microbial Community Composition and Ecology of an Acidic Aquatic Environment: The Tinto River, Spain
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DOI：
10.1007/s002480000044
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发表时间：
2000
影响因子：
3.6
通讯作者：
A. López-Archilla;Irma Marín;Ricardo Amils
中科院分区：
文献类型：
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作者：
A. López-Archilla;Irma Marín;Ricardo Amils
我们研究了一个酸性的河流，廷托河，在西班牙西南部的物理化学和生物学特性之间的相关性。Tinto河是一个极端的环境，其特点是pH值低（平均值为2.2）和高浓度的重金属（Fe 2.3 g/L，Zn 0.22 g/L，Cu 0.11 g/L）。这些极端条件是化能无机营养微生物代谢活动的产物，包括铁和硫氧化细菌，这些微生物在其沃茨中的浓度很高。河流中的食物链非常有限，完全是微生物。廷托河的初级生产力是光合和化能无机营养活动的总和。异养细菌和真菌是主要的分解者，原生生物是主要的捕食者。相关性分析，包括物理化学和生物学变量之间的密切关系，酸性pH值和丰富的化能无机营养细菌和丝状真菌。化能无机营养菌与河流中发现的重金属有关。的生物和非生物变量的主成分分析表明，廷托河生态系统可以被描述为三个主要的变量：pH值，金属浓度和生物生产力的函数。
We studied the correlation between physicochemical and biological characteristics of an acidic river, the Tinto River, in Southwestern Spain. The Tinto River is an extreme environment characterized by its low pH (mean of 2.2) and high concentrations of heavy metals (Fe 2.3 g/L, Zn 0.22 g/L, Cu 0.11 g/L). These extreme conditions are the product of the metabolic activity of chemolithotrophic microorganisms, including iron- and sulfur-oxidizing bacteria, that can be found in high concentrations in its waters. The food chain in the river is very constrained and exclusively microbial. Primary productivity in the Tinto River is the sum of photosynthetic and chemolithotrophic activity. Heterotrophic bacteria and fungi are the major decomposers and protists are the major predators. A correlation analysis including the physicochemical and biological variables suggested a close relationship between the acidic pH values and abundance of both chemolithotrophic bacteria and filamentous fungi. Chemolithotrophic bacteria correlated with the heavy metals found in the river. A principal component analysis of the biotic and abiotic variables suggested that the Tinto River ecosystem can be described as a function of three main groups of variables: pH values, metal concentrations, and biological productivity.