生物扰动强度受水中含氧量、食物供给和沉积作用过程的制约。
The strength of the bioturbation is affected and controlled by the oxygen content of the water, "feeding biota with food", and depositional process.
主要用于增加鱼池水中含氧量，满足鱼类生长发育所需的氧气。
It is mainly applied to increasing oxygen content in fishpond, so as to provide sufficient oxygen required by fish growing.
但幸运的是，大部份用来增加水中含氧量的方法也有降低水中二氧化碳的功效。
Fortunately, most methods for increasing oxygen in a tank will also decrease carbon dioxide.
由于严峻的干旱导致的马拉·奎利河水中含氧量缺乏导致了河中数以千计的鱼死亡。
Plummeting water oxygen levels due to a severe drought have led to thousands of fish dying along the Manaquiri River.
孔雀鱼需要氧气才能存活，所以当我们看到它们无力的浮游在水面上换气时，这就是一种警讯并代表饲养缸里的水中含氧量不足。
Fish need oxygen to survive. If your guppies are gasping at the water's surface, this is a sign that there is not enough oxygen in the tank for the number of fish you have.
水中的含氧量很高，所以你不会有任何呼吸方面的问题。
The level of oxygen is very high in water, and you will not have any breathing problems.
由于大气中氧气含量的减少，较少的氧气溶于海水，使得海水中的含氧量轻微的减少。
As atmospheric oxygen levels fall, less oxygen will dissolve in seawater, depleting levels slightly.
但是，如果水中的含氧量下降到沙丁鱼难以生存的程度，那么，海豚也会随之消失的，冈萨尔沃说道。
But if the water's oxygen levels decline enough to drive the sardines out, the dolphins will disappear too, says Gonzalvo.
但是，如果水中的含氧量下降到沙丁鱼难以生存的程度，那么，海豚也会随之消失的，冈萨尔沃说道。
But if the water's oxygen levels decline enough to drive the sardines out, the dolphins will disappear too, says Gonzalvo.
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