Microorganisms are active in 10.9 thousand meters water depth.

Turning on the unit of observation in the Challenger Deep, Mariana Trench, Pacific Ocean the deepest in the world (10.9 thousand meters water depth), and other international research team for Marine-Earth Science and Technology Organization, the first in the world to measure the oxygen concentration of the soil, such as water or seabed successful. Has been considered in the ultra-deep water and nutrient-poor water pressure in light of the high biological activity and limited, high concentrations of organic matter from the point 6000 m water depth, microorganisms had been very active.

It is said that exploration of extreme environments such as deep sea ultra more than 10,000 meters water depth, and is the key to understand the origin of life, hampered by such pressure more than 1 tons per square centimeter, have been done much research no.
A research team from the biosphere region length extreme environments of marine mechanism has developed a device such as a sensor-laden observation and measurement equipment to withstand the pressure of the deep ultra-shooting, the concentration of organic matter and oxygen. Dropped from the sea, were investigated in detail the seabed of 10.9 thousand meters and 6000 meters water depth.
As a result, in 6000 meters of seabed organisms, such as large fish and Sokoebi lived. Organisms visible, such as lugworm and cucumbers, but it was only, as compared to the concentration of organic matter and oxygen consumption of marine soil, times more 6,7 found 10.9 thousand meters, with 10.9 thousand meters are microorganisms actively I have found that it is active. It's not likely to ultra-deep water is tempting to think no living creatures could exist. Ocean may have played an important mission for the future of mankind in the future.


海洋研究開発機構などの国際研究チームが、世界で最も深い太平洋・マリアナ海溝のチャレンジャー海淵（水深1万900メートル）に観測装置を投入し、水中や海底土の酸素濃度などの測定に世界で初めて成功した。高水圧で光や栄養に乏しい超深海では生物の活動は限られると考えられてきたが、水深6000メートル地点より有機物濃度が高く、微生物が活発に活動していた。
　水深1万メートルを超える超深海のような極限環境の探査は、生命の起源を解明するカギになると言われるが、1平方センチ当たり1トンを超える水圧などに阻まれ、調査はあまり行われていない。
　海洋機構の極限環境生物圏領域長らの研究チームは、超深海の圧力に耐える撮影機器や、有機物や酸素濃度を計測するセンサーなどを積んだ観測装置を開発。海上から投下し、水深1万900メートルと6000メートルの海底を詳細に調査した。
　その結果、6000メートルの海底では魚類やソコエビなど大型生物が生息していた。1万900メートルではナマコやゴカイなど目に見える生物はわずかだったが、海底土の酸素消費量や有機物の濃度を比較すると、1万900メートルの方が6、7倍多く、微生物が活発に活動していることが分かった。超深海には生物は存在できないと考えがちですがそうではないんですね。海洋は、今後の人類の未来にとって重要な使命を担っているのかもしれませんね。