Definition of "hypolimnion" [hypolimnion]

• The layer of water in a thermally stratified lake that lies below the thermocline, is noncirculating, and remains perpetually cold. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "At the same time the bottom 20 calculated for each sampling station on each sampling date. m water temperatures increased by about 0. 3°C throughout In the remainder of this study, the term hypolimnion refers the strati fi ed season, indicating a small, steady downward to the 20-m layer above the bottom (Fig. 3). transfer of heat (Fig. 4)."
• "Lake populations needing to avoid temperature extremes are very likely to be confined to the hypolimnion during the warmest months provided anoxic conditions do not develop."
• "In addition, the prolonged thermal stratification that is likely to accompany rising temperatures could possibly lead to lower oxygen concentrations and increased phosphorus concentrations in the hypolimnion, benefiting nutrient-limited primary production."