Epilimnion

（重定向自Epilimnion zone）

The epilimnion or surface lake is the top-most layer in a thermally stratified lake, occurring above the deeper hypolimnion. It is warmer and typically has a higher pH and higher dissolved oxygen concentration than the hypolimnion.

Being exposed at the surface, it typically becomes turbulently mixed as a result of surface wind-mixing. It is also free to exchange dissolved gases such as O₂ and CO₂ with the atmosphere. Because this layer receives the most sunlight it contains the most phytoplankton. As they grow and reproduce they absorb nutrients from the water, when they die they sink into the hypolimnion resulting in the epilimnion becoming depleted of nutrients.

单词	Epilimnion zone
释义	Epilimnion zone 英语百科 Epilimnion （重定向自Epilimnion zone） The epilimnion or surface lake is the top-most layer in a thermally stratified lake, occurring above the deeper hypolimnion. It is warmer and typically has a higher pH and higher dissolved oxygen concentration than the hypolimnion. Being exposed at the surface, it typically becomes turbulently mixed as a result of surface wind-mixing. It is also free to exchange dissolved gases such as O₂ and CO₂ with the atmosphere. Because this layer receives the most sunlight it contains the most phytoplankton. As they grow and reproduce they absorb nutrients from the water, when they die they sink into the hypolimnion resulting in the epilimnion becoming depleted of nutrients.
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