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Related to hypolimnion: Metalimnion


 (hī′pə-lĭm′nē-ŏn′, -ən)
The layer of water in a thermally stratified lake that lies below the thermocline, is noncirculating, and remains perpetually cold.

[hypo- + Greek limnē, lake, pool.]

hy′po·lim·net′ic (-lĭm-nĕt′ĭk), hy′po·lim′ni·al adj.


n, pl -nions or -nia (-nɪə)
(Physical Geography) the lower and colder layer of water in a lake
[C20: from hypo- + Greek limnion, diminutive of limnē lake]


(ˌhaɪ poʊˈlɪm niˌɒn, -ni ən)

n., pl. -ni•a (-ni ə)
(in certain lakes) the layer of water below the thermocline.
[1905–10; hypo- + Greek -limnion, derivative of límnē lake]
hy`po•lim•net′ic (-lɪmˈnɛt ɪk) hy`po•lim′ni•al, adj.
References in periodicals archive ?
Aerators shall provide mixing and aeration of the hypolimnion without destratifying the lake.
2004) stressed that Anabaena and Aphanizomenon can compensate for their N demand by vertical migrations into the hypolimnion or the sediments, thus avoiding the need to fix nitrogen (low DIN hypothesis).
Water samples were taken from the epilimnion and hypolimnion in the deepest portion of the lake using a Kemmerer sampler (Clean Lakes Program 2001; EPA 2007).
Its amplitude of water temperature was recorded about 10[degrees]C, difference between epilimnion and hypolimnion layers during thermocline, while it decreased to about 6.
With the onset of stratification, organic matter rapidly uses oxygen in the hypolimnion.
The effect of hypolimnion reservoir releases on fish distribution and species diversity.
At the same time in the nearby closed lakes where the oxygen-poor hypolimnion formed under the influence of thermal stratification should create a potential environment for the formation of sulfides, no infiltration of sulfates has occurred.
Thus a very deep lake can retain oxygen in the hypolimnion all
The lowest level, or hypolimnion, is the coldest and, again, the temperature is fairly uniform.
The lake was stratified throughout the summer, with the boundary between the epilimnion and the hypolimnion at a depth of 1 to 2 meters.
As a consequence, nutrient loss to the hypolimnion is reduced, epilimnetic recycling is increased, and inorganic sediments seem to be redirected to the lake's stream outflow rather than deposited on the bottom.