Of these , we can identify anoxygenic phototrophs , sulphate reducers and methanogens 从这些里面,我们可以辨认出无氧光合自营菌,硫酸盐还原菌,以及硝化细菌
2.
If verified , this finding would be consistent with having methanogens living below the surface of mars 这项发现一旦经确认属实，将与火星表面下存在产甲烷菌的说法不谋而合。
3.
Their exhalations , oxygen , did for both methanogens and methaneand created an atmosphere similar to the one that exists now 现在，草地和森林各占陆地面积的30 % ，裸楼的岩石占到18 % ，雪地和沙漠各占到15 %和7 % 。
4.
In this view , oxygen - detesting methanogens reigned supreme during the first two billion years of earth ' s history , and the greenhouse effect of the methane they produced had profound consequences for climate 据此推测，厌氧的产甲烷菌曾称霸地球历史的最初20亿年，它们产生的甲烷所产生的温室效应，对当时的气候有举足轻重的影响。
5.
They also suggest that methanogens would have filled niches that oxygen producers and sulfate reducers now occupy , giving them a much more prominent biological and climatic role than they have in the modern world 他们同时指出，过去的产甲烷菌宛如目前的造氧生物与硫酸盐还原生物一样?有优势，使它们当时在生物与气候上的地位远比现代重要。
6.
A similar haze layer on the ancient earth would have also cooled the climate , thus shifting the methanogen population back toward those slower - growing species that prefer cooler weather and thereby limiting further increases in methane production 类似的霾层同样使古地球的气候变冷，导致产甲烷菌的菌落演变回偏好较冷天气而生长缓慢的菌种，因而进一步抑制甲烷产量的增加。
7.
The archaea contain many organisms of extreme environments , such as hydrothermal vents , hot springs , saline sediments , volcanic craters and boiling muds . they include methane - generating organ - isms ( methanogens ) , sulfate reducers , and extremophiles 古细菌包括许多生长在极端环境中的有机体，如高热温泉口，高盐沉积地区，火山喷发处，沸腾的岩浆中等的生物有机体，还包括产甲烷菌等。
8.
Based on these and other considerations , some scientists have proposed that methanogens living on geologically derived hydrogen might form the base of underground microbial ecosystems on mars and on jupiter ' s ice - covered moon , europa 基于前述及若干理由，有些科学家便提出，在火星以及被冰层覆盖的木星卫星木卫二上，以地质活动所产生的氢气为生的产甲烷菌，可能会形成地下细菌生态系的主体。
