Bacteriohopanepolyols preserved in silica sinters from Champagne Pool (New Zealand) indicate a declining temperature gradient over the lifetime of the vent
Bacteriohopanepolyols preserved in silica sinters from Champagne Pool (New Zealand) indicate a declining temperature gradient over the lifetime of the vent
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DOI：
10.1016/j.orggeochem.2014.02.004
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发表时间：
2014-04-01
影响因子：
3
通讯作者：
Talbot, Helen M.
中科院分区：
文献类型：
--
作者：
Gibson, Robert A.;Sherry, Angela;Talbot, Helen M.
来自新西兰北岛陶波火山带地热喷口香槟池(CP)的硅质烧结矿含有保存极为完好的细菌多元醇(BHP)分布。BHPS存在于一系列在CP寿命内(存在之前的900年)沉积的烧结矿中。这些分布与已知栖息在CP上的必和必拓产菌目成员的存在有很好的相关性。例如，酸性硫杆菌、伯克霍尔德雷亚目和假单胞菌是复合BHP(在C-35有一个更复杂的官能团)的已知来源，如细菌环醇乙醚，在所分析的每个CP烧结矿中发现的相对丰度都很高。在CP烧结矿中保存的必和必拓分布与之前描述的任何其他环境环境下的分布不同，五官能化必和必拓占总组合的55%。此外，复合BHP是每个样品中含量最丰富的化合物类型，占BHP总分布的80%。随着烧结矿年龄的增加，必和必拓的丰度普遍增加。同样，在较老的烧结机中，必和必拓化合物的复杂性增加了。这些观察结果与过去喷口水的温度较高是一致的。在这种环境下，在喷口的整个生命周期内，BHP的良好保存突显了BHP作为生物标记物在重建现代和古代地热喷口细菌群落方面的有用性。(C)爱思唯尔有限公司出版的2014年。
Siliceous sinters from Champagne Pool (CP), a geothermal vent in the Taupo Volcanic Zone, North Island, New Zealand contained exceptionally well-preserved bacteriohopanepolyol (BHP) distributions. BHPs were present in a range of sinters deposited over the lifetime of CP (900 yr before present). The distributions correlated well with the presence of members of BHP-producing bacterial orders known to inhabit CP. For example, Acidothiobacillales, Burkholderiales and Pseudomonadales are known sources of composite BHPs (with a more complex functional group at C-35), such as bacteriohopanetetrol cyclitol ether, found in high relative abundance in each CP sinter analysed. The BHP distributions preserved in CP sinters were different from those described previously for any other environmental setting, with pentafunctionalised BHPs accounting for up to 55% of the total assemblage. Furthermore, composite BHPs were the most abundant compound type in each sample and accounted for up to 80% of the total BHP distribution. As the age of sinter increased a general increase in BHP abundance was observed. Similarly, in older sinters the complexity of the BHP compounds increased. The observations are consistent with a higher temperature of vent water in the past. The excellent preservation of BHPs in this setting, over the lifetime of the vent, highlights the usefulness of BHPs as biomarkers for reconstructing modern and ancient geothermal vent bacterial communities. (C) 2014 Published by Elsevier Ltd.