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1 billion years ago, the seabed sediments in the microbial species had continued to JAMSTEC discover the

The Earth’s surface of about 7 percent for marine. The seabed below the stratum to a myriad of microbial species is known. The Japan Agency for Marine-Earth Science and Technology Center [JAMSTEC] is 7 Months 29 days in the South Pacific, the ring of the basin below the seafloor from the collected sediment samples in microbial species as confirmed and announced.

【Here】JAMSTEC deep sea sediment by aerobic microbes inhabited, and the

■Microbial difficult submarine base layer

Beneath the ocean floor in the plankton, such as the corpse of deposited layers exists. This organic matter is deposited strata, the microorganisms during the formation from the containment have been considered.

Land near the submarine base layer is the microbial density in the habitat on the other hand, land is far from the open ocean is a shortage of minerals in the marine plankton is small. Therefore, the seabed underlying layer of strata in the microbes of the carcasses, such as organic matters less. And in the South Pacific Ring Basin seabed and the underlying layer is clay, and the sealed environment of the microorganisms is still alive whether the Unknown was.

■The dissolved oxygen alive in these microorganisms

Japan Agency for Marine-Earth Science and Technology, National Institute of Advanced Industrial Science and Technology,Kochi University, such as researchers from the group of the South Pacific, the ring of the basin below the seafloor were taken from the sediment within microbial species the aim of this study was to investigate whether. 2010 年 10 months from the 12 months conducted”in the South Pacific Ring Basin life exploration”in the collected sediment is 430 million years ago 1 billion from 150 million years ago as it is formed. These deposits in the area, giving microbes tried.

As a result, oxygen begins to melt the sample in the growth of microorganisms was confirmed. Approximately 1 billion, 150 million years ago, formed the sediment, approximately 99% of the microorganisms were proliferating and the like. On the other hand do not contain oxygen in the sediment is microbial growth, but was not confirmed.

1 billion, 150 million years is also a long period of microorganisms in the habitat to continue the life activities on the ground significantly decreased, it is thought that it causes that. Therefore, the ground much slower than microbes on the seafloor underlying layer had evolved in May.

In the future, and cultured for microorganisms to continue to investigate the submarine base layer of microorganisms inside the singular evolution system is obviously not expected to?

Details of the study, the Ying Nature Communications magazine on 7 on May 28 have been published. [Article: Kadono 未智・The article list to look at]


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