全释硬科技丨海底万米藏“生命绿洲” “深渊居民”靠什么存活?|成年免费视频黄网站在线观看

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  近日,“奋斗者”号首次在海底近万米的深渊观测到世界分布最深、规模最大的化能合成生命群落。

  万物生长靠太阳

  真是这样吗

  在深度将近10000米的海底,黑暗无光,还要面对远超陆地1000倍的压强——相当于指甲盖大小的地方,要承受一辆坦克的重量。但就在这样地狱般的绝境里,我国科学家首次发现竟然还藏着一片生命绿洲。

  这是由中国科学院深海所领衔的“全球深渊探索计划”中重要的一次科考,在西北太平洋的千叶-堪察加海沟和阿留申海沟,9533米深的海底,依靠我国的国之重器——“奋斗者”号全海深载人潜水器的镜头,捕捉到了一个匪夷所思的场景:

  白色管状蠕虫像小树苗一样扎堆生长;

  双壳类软体动物则紧紧扒在岩石上,时不时张开壳“探头探脑”。

  万米深渊,跨越2500公里的广阔海沟底部,竟然都是这样热闹的“海底总动员”,这一发现也打破了人类对于极限深度生命存在的传统认知。

  这些“深渊居民”

  究竟靠什么活下来

  秘密就藏在海底的沉积物里。海沟深处,会不断涌出富含硫化氢和甲烷的流体。对我们来说,硫化氢是臭鸡蛋味的毒气,甲烷是烧火的燃气,但对这些“深渊居民”来说,可是“美味佳肴”!

  这些“深渊居民”的体内不仅有可以耐1000个大气压的耐压机制,而且还自带“微型化工厂”,能把这些与生命无关的化学物质转化为维持生存的养料。

  更令人惊讶的是,在海底近10000米深处,滋养这些化能合成生命群落的甲烷,竟然是由海底更深处的微生物制造的。深渊之下还有深渊,其中可能隐藏着一个更大的生命王国,他们将底部埋藏的碳,转化为甲烷,封存在海底,形成规模巨大的甲烷储库。而海底这片隐秘的“碳工厂”可能在全球深渊底部都广泛存在,或许这也是调节地球碳循环乃至气候变化的“神秘力量”。

  生命是顽强而伟大的,在这颗星球上,总有生灵敢于凝视黑暗的深渊,用自己的方式,书写着生存的奇迹。

  (总台央视记者 帅俊全 褚尔嘉 高博远)

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