Every Pond or lake has several different zones that divide the water column from top to bottom and side to side. These zones consist of the Littoral Zone, Limnetic Zone, Profundal Zone, Euphotic Zone, and Benthic Zone.
People Also Ask
Lakes and ponds are divided into three different “zones” which are usually determined by depth and distance from the shoreline.
Summary. English: The three primary zones of a lake are the littoral, open-water (also called the photic or limnetic), and deep-water (also called the aphotic or profundal) zones. If the above link no longer works, visit http://www.ck12.org and search for CK-12 Earth Science.
The profundal zone is a deep zone of an inland body of freestanding water, such as a lake or pond, located below the range of effective light penetration.
The Benthic Zone is the bottom of the pond or lake and consists of organic sediments and soil. As the body of water ages, this zone will increase. It is considered the pond or lake's digestive system. This zone is where bacteria decompose organic matter from dead algae, aquatic plants, and fish and animal waste.
Situated in south-east Siberia, the 3.15-million-ha Lake Baikal is the oldest (25 million years) and deepest (1,700 m) lake in the world. It contains 20% of the world's total unfrozen freshwater reserve.
In freshwater ecosystemsThe three primary zones of a lake are the littoral zone, the open-water (also called the photic or limnetic) zone, and the deep-water (also called the aphotic or profundal) zone.
The shallow down-sloping shelf of a lake or pond is commonly referred to as the lake's “littoral zone”. The zone is an area where the water meets the land. Plants here support wildlife such as wading birds, turtles and crabs. Littoral Zones are crucial components of healthy ecosystems, hence are protected by law.
It may surprise you to know there is no technical difference between lakes and ponds, according to the National Park Service(Opens in a new window). However, a general rule of a thumb is if a body of water is large and deep it's a lake and if it's short and shallow it's a pond.
The Life Cycle of LakesAll lakes, even the largest, slowly disappear as their basins fill with sediment and plant material. The natural aging of a lake happens very slowly, over the course of hundreds and even thousands of years. But with human influence, it can take only decades. A lake's plants and algae slowly die.
Some used thermal stratification: a lake is a body of water that is deep enough to thermally stratify into two or three layers during the summer in temperate regions such as New Hampshire.
A lake's shallowest layer is the epilimnion.Its middle layer is the metalimnion, or thermocline.The deepest layer is the hypolimnion. The most important chemicals in a lake are nitrogen and phosphorus.
Exorheic, or open lakes drain into a river, or other body of water that ultimately drains into the ocean. Endorheic basins fall into the category of endorheic or closed lakes, wherein waters do not drain into the ocean, but are reduced by evaporation, and/or drain into the ground.
For a lake to keep its water over time, it has to be replenished. There are both natural and man-made lakes. The main way that water gets into reservoirs and man-made lakes is from the rivers and streams that were dammed to create them.