他们发现在埃迪卡拉纪有至少三次12C的增加,而较轻的碳同位素12C相比于它的同胞13C更容易被生物体吸收转化为有机物。
They suggest these increases mark moments when the amount of oxygen in seawater wentup, because more oxygen would mean more oxidisation of buried organic matter. Thatwould liberate its 12C, for incorporation into rocks.
他们推测这些增长标志当时海水中的氧含量在增长,因为更多的氧气意味着更多的埋藏的有机物的氧化。他们在变成化石的过程中就将释放12C。
Each of Dr Chus oxidation events corresponds with an increase in the size, complexity anddiversity of life, both plant and animal.
褚博士的每个氧化事项都与动植物在其体积,复杂性、多样性上的增加有关。
What triggered what, however, is unclear.
然而,哪一个引发哪一个却不得而知。
There may have been an increase in photosynthesis because there were more algaearound.
这有可能因为出现了更多的藻类,光合作用增强,
Or eroded material from newly formed mountains may have buried organic matter thatwould otherwise have reacted with oxygen, leading to a build-up of the gas.
或者是新形成的山脉上的腐蚀物质埋藏本该和氧气反应的有机物,导致气体的增加。
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