chemocline

Typically the green and purple sulfur bacteria live in that chemocline, enjoying the supply of H2S from below and sunlight from above.

绿硫菌与紫硫菌通常会生活在化变中，同时享受下方源源绝的硫化氢与上方充足的阳光。

So long as their balance remains undisturbed, the oxygenated and hydrogen sulfide–saturated waters stay separated, and their interface, known as the chemocline, is stable.

直到达成平衡、相干扰，充氧的海水与饱和硫化氢的海水彼此分隔，而且两者间的界面「化变」也是稳定的。