Editing Limnology (section)

====Light interactions====
Light zonation is the concept of how the amount of sunlight penetration into water influences the structure of a body of water.<ref name="limnology book"/> These zones define various levels of productivity within an aquatic ecosystems such as a lake. For instance, the depth of the water column which sunlight is able to penetrate and where most plant life is able to grow is known as the [[Photic zone|photic or euphotic]] zone. The rest of the water column which is deeper and does not receive sufficient amounts of sunlight for plant growth is known as the [[aphotic zone]].<ref name="limnology book"/> The amount of solar energy present underwater and the spectral quality of the light that are present at various depths have a significant impact on the behavior of many aquatic organisms. For example, zooplankton's vertical migration is influenced by solar energy levels.<ref name=":2">{{Cite book |last1=Tundisi |first1=Jose Galizia |url=https://www.taylorfrancis.com/books/9780203803950 |title=Limnology |last2=Tundisi |first2=Takako Matsumura |date=2012-01-27 |publisher=CRC Press |isbn=978-0-203-80395-0 |edition=0 |language=en |doi=10.1201/b11386}}</ref>