The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats
The impact of long-term hydrocarbon exposure on the structure, activity, and biogeochemical functioning of microbial mats
复制标题
DOI：
10.1016/j.marpolbul.2016.07.023
复制
发表时间：
2016-10-15
影响因子：
5.8
通讯作者：
Goni-Urriza, Marisol
中科院分区：
文献类型：
--
作者：
Aube, Johanne;Senin, Pavel;Goni-Urriza, Marisol
光合微生物垫是由太阳光驱动的代谢结构系统。它们无处不在，可以在碳氢化合物污染的地方生长。我们的目标是确定慢性碳氢化合物污染对微生物垫的结构、活性和功能的影响。我们将其与具有相似地球化学特征的未受污染的垫子进行了比较。在两年的春季和秋季对垫子进行了采样。观察到参考垫的季节性变化：与硫循环相关的细菌在春季样本中占主导地位，而蓝细菌在秋季占主导地位。受污染的垫子表现出轻微的季节性变化；注意到蓝藻的逐渐增加，表明经典季节性行为的扰动。烃含量是解释微生物群落结构差异的主要因素；然而，碎烃细菌是污染垫中罕见或短暂的操作分类单位（OTU）之一。我们建议，在长期污染的系统中，碎烃细菌不能被视为污染哨兵。 (C) 2016 Elsevier Ltd. 保留所有权利。
Photosynthetic microbial mats are metabolically structured systems driven by solar light. They are ubiquitous and can grow in hydrocarbon-polluted sites, Our aim is to determine the impact of chronic hydrocarbon contamination on the structure, activity, and functioning of a microbial mat. We compared it to an uncontaminated mat harboring similar geochemical characteristics. The mats were sampled in spring and fall for 2 years. Seasonal variations were observed for the reference mat: sulfur cycle-related bacteria dominated spring samples, while Cyanobacteria dominated in autumn. The contaminated mat showed minor seasonal variation; a progressive increase of Cyanobacteria was noticed, indicating a perturbation of the classical seasonal behavior. Hydrocarbon content was the main factor explaining the differences in the microbial community structure; however, hydrocarbonoclastic bacteria were among rare or transient Operational Taxonomic Units (OTUs) in the contaminated mat We suggest that in long-term contaminated systems, hydrocarbonoclastic bacteria cannot be considered a sentinel of contamination. (C) 2016 Elsevier Ltd. All rights reserved.