Methanotrophic potential of Dutch canal wall biofilms is driven by Methylomonadaceae.
Methanotrophic potential of Dutch canal wall biofilms is driven by Methylomonadaceae.
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DOI：
10.1093/femsec/fiad110
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发表时间：
2023-09-19
影响因子：
4.2
通讯作者：
中科院分区：
文献类型：
--
作者：
在过去的一千年里，全球水道城市化影响了这些水生生态系统中的微生物群落。养分投入的增加使大多数城市沃茨成为温室气体二氧化碳（CO2）和甲烷（CH4）的净来源。在这里，运河壁的五个荷兰城市进行了研究，他们的生物膜甲烷氧化电位，以及水化学，CO2和CH4排放量的实地观察。三个城市显示运河壁生物膜具有相对较高的生物CH4氧化电位，高达0.48 mmol gDW−1 d−1，而其他两个城市没有显示氧化电位。盐度被确定为生物膜细菌群落组成的主要驱动因素。在甲烷氧化生物膜中观察到Crenothrix和Methyloglobulus methanotrophs。我们发现，运河生物膜中的微生物氧化是普遍存在的，并且可能是由在具有明显不同的运河水化学的城市中发现的相同类群驱动的。生物膜的氧化电位与甲烷排放量无关，但与生物膜中甲烷氧化菌的存在或不存在有关。这是控制是否有足够的甲烷存在，以维持甲烷营养型社区。这些结果表明，运河壁生物膜可以直接有助于缓解城市运河的温室气体。荷兰城市运河中的运河壁生物膜含有甲烷氧化细菌，可以减轻运河的部分甲烷排放。
Global urbanization of waterways over the past millennium has influenced microbial communities in these aquatic ecosystems. Increased nutrient inputs have turned most urban waters into net sources of the greenhouse gases carbon dioxide (CO2) and methane (CH4). Here, canal walls of five Dutch cities were studied for their biofilm CH4 oxidation potential, alongside field observations of water chemistry, and CO2 and CH4 emissions. Three cities showed canal wall biofilms with relatively high biological CH4 oxidation potential up to 0.48 mmol gDW−1 d−1, whereas the other two cities showed no oxidation potential. Salinity was identified as the main driver of biofilm bacterial community composition. Crenothrix and Methyloglobulus methanotrophs were observed in CH4-oxidizing biofilms. We show that microbial oxidation in canal biofilms is widespread and is likely driven by the same taxa found across cities with distinctly different canal water chemistry. The oxidation potential of the biofilms was not correlated with the amount of CH4 emitted but was related to the presence or absence of methanotrophs in the biofilms. This was controlled by whether there was enough CH4 present to sustain a methanotrophic community. These results demonstrate that canal wall biofilms can directly contribute to the mitigation of greenhouse gases from urban canals. Canal wall biofilms in Dutch urban canals contain methane-oxidizing bacteria that mitigate part of the canal’s methane emissions.
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DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
48
作者：
Callahan BJ;McMurdie PJ;Rosen MJ;Han AW;Johnson AJ;Holmes SP
通讯作者：
Holmes SP
影响因子：
2.4
作者：
Martinez-Cruz, Karla;Gonzalez-Valencia, Rodrigo;Thalasso, Frederic
通讯作者：
Thalasso, Frederic
影响因子：
12.8
作者：
Martinez-Cruz, Karla;Sepulveda-Jauregui, Armando;Thalasso, Frederic
通讯作者：
Thalasso, Frederic
影响因子：
4.2
作者：
FRENZEL, P;THEBRATH, B;CONRAD, R
通讯作者：
CONRAD, R