Lake - Limnology

Limnology

Limnology is the study of inland bodies of water and related ecosystems. Limnology divides lakes into three zones: the littoral zone, a sloped area close to land; the photic or open-water zone, where sunlight is abundant; and the deep-water profundal or benthic zone, where little sunlight can reach. The depth to which light can reach in lakes depends on turbidity, determined by the density and size of suspended particles. A particle is in suspension if its weight is less than the random turbidity forces acting upon it. These particles can be sedimentary or biological in origin and are responsible for the color of the water. Decaying plant matter, for instance, may be responsible for a yellow or brown color, while algae may cause greenish water. In very shallow water bodies, iron oxides make water reddish brown. Biological particles include algae and detritus. Bottom-dwelling detritivorous fish can be responsible for turbid waters, because they stir the mud in search of food. Piscivorous fish contribute to turbidity by eating plant-eating (planktonivorous) fish, thus increasing the amount of algae (see aquatic trophic cascade). The light depth or transparency is measured by using a Secchi disk, a 20-cm (8 in) disk with alternating white and black quadrants. The depth at which the disk is no longer visible is the Secchi depth, a measure of transparency. The Secchi disk is commonly used to test for eutrophication. For a detailed look at these processes, see lentic ecosystems.

A lake moderates the surrounding region's temperature and climate because water has a very high specific heat capacity (4,186 J·kg−1·K−1). In the daytime a lake can cool the land beside it with local winds, resulting in a sea breeze; in the night it can warm it with a land breeze.

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Other articles related to "limnology":

Limnology - Journals
... Advances in Limnology Annales de Limnologie - International Journal of Limnology Aquatic Conservation Aquatic Ecology Canadian Journal of Fisheries and Aquatic ...
Lake - Limnology
... Limnology is the study of inland bodies of water and related ecosystems ... Limnology divides lakes into three zones the littoral zone, a sloped area close to land the photic or open-water zone, where sunlight is abundant and the deep-water ...
Edward Asahel Birge
... He was one of the pioneers of the study of limnology, and served as acting president of the university from 1900 to 1903 and as president from 1918 to 1925 ... Chancey Juday were pioneers of North American limnology (the study of inland waters, such as rivers and lakes) ... Together they founded an influential school of limnology on Lake Mendota, as a component of the University of Wisconsin ...
Chancey Juday
... Birge were pioneers of North American limnology ... and Juday founded an influential school of limnology on Lake Mendota at the University of Wisconsin ... and in 1950 shared posthumously the Einar Naumann Medal of the International Association of Limnology with Birge ...
Maharana Pratap Sagar - Flora and Fauna - Limnology
... Mahseer angling in the Pong Dam reservoir is said to be the only one of its kind in the country. ...