from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or occurring in the deeper, open waters of lakes or ponds.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to the deeper, open waters of a lake etc.
from The Century Dictionary and Cyclopedia
- Living in fresh water; pertaining to fresh-water life.
- Specifically Noting the free-floating or free-swimming microscopic organisms found in rivers, lakes, pools, and other bodies of fresh water. Sometimes used synonymously with pelagic.
However, in a few localities, an inverse process has been observed, such as in Caño Mánamo (Delta Amacuro), where mangroves have expanded at a rate of 6 - 7 ha/year since 1965, when a cofferdam was built, leading to the salinization of the formerly limnetic waters.
Little light penetrates all the way through the limnetic zone into the profundal zone.
The near-surface open water surrounded by the littoral zone is the limnetic zone.
The limnetic zone is well-lighted (like the littoral zone) and is dominated by plankton, both phytoplankton and zooplankton.
The UBC study involved new species found in British Columbia lakes that have evolved distinct physical traits: limnetic sticklebacks (smaller open water dwellers with narrow mouths), benthic sticklebacks (larger bottom dwellers with a wide gape) and a generalist species to represent the probable ancestor of the two species.
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