profundal zone

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profundal zone

[prō′fənd·əl ‚zōn]
(ecology)
The region occurring below the limnetic zone and extending to the bottom in lakes deep enough to develop temperature stratification.
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References in periodicals archive ?
Fall diets of alewife, rainbow smelt, and slimy sculpin in the profundal zone of southern Lake Ontario during 1994-2005 with an emphasis on occurrence of Mysis relicta.
It is a common and often dominating tubificid species in the profundal of many European eutrophic lakes (Timm 2013).
Heavy metal levels may be high in sublittoral and profundal sediment samples collected from especially input sections of natural lenthic systems.
Measures include substrate quality, instream habitat cover, watershed characteristics, shoreline development, littoral and profundal zone development and quality, depth, and measures of erosion and embeddedness.
1983, "Composition and diversity of the profundal macrobenthic community in the polluted lake Nemi (Central Italy), 1979-80," Ecological Applications, 4, 211-220.
5 km wide with a maximum depth of 5 m before a steep drop toward profundal depths at the edge of the bay, approximately 0.
With these data we were able to determine optimal locations for sediment coring and to collect and analyze profundal sediment cores.
Chironomus species (Diptera: Chironomidae) in the profundal benthos of Spanish reservoirs and lakes: factors affecting distribution patters.
They represent the profundal facies of a large lake and yield an aquatic fauna consisting of vertebrates and crustaceans, such as ostracodes, conchostracans, and syncarids.
Standing water lakes may be large or small, and the life zones are classified as the littoral zone, at the edge of the lake and quite productive; the limnetic zone, a region of open water where phytoplankton are abundant in the upper layers, and the profundal zone, the region below the limnetic zone where there is no plant life.