Limnology

2. Beyond the littoral zone of a lake.
6. Uppermost and warmest layer (also called the mixed layer) of a lake that experiences density stratification induced by seasonal warming at the lake surface.
8. Without light, generally interpreted as receiving less than 1% of solar irradiance reaching a lake surface.
10. an area filled with water, either natural or artificial, that is smaller than a lake
11. Near the shore of a waterbody, where irradiance reaching the bottom is above 1% of solar irradiance at the water surface.
13. an area filled with water, localized in a basin, surrounded by land
15. A layer of transitional density and temperature that connects the epilimnion to the hypolimnion.
16. an enlarged natural or artificial lake created using a dam to store fresh water

1. Portion of a lake receiving sufficient solar irradiance to support photosynthesis (typically more than 1% of full solar irradiance).
3. the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations
4. a distinct ecosystem that is flooded by water, either permanently (for years or decades) or seasonally (for weeks or months)
5. The zone of a lake extending a few cm above and below the bottom of the lake.
7. The densest, deepest, and coolest layer of a thermally stratified lake. The hypolimnion does not support photosynthesis, because it lacks solar irradiance, and in many cases shows partial or complete depletion of dissolved oxygen.
9. a point at which water flows from an aquifer to the Earth's surface
12. a natural flowing watercourse, that follows a well-defined, permanent path, usually within a valley, usually freshwater, flowing towards an ocean, sea, lake or another river
14. also called a brook is a smaller natural flow of water that follows a more temporary path that is usually not in a valley