While the surface layer may have 10 mg / L or more dissolved oxygen in summer, the depths of a meromictic lake can have less than 1 mg / L . Very few organisms can live in such an oxygen-poor environment.
32.
The lakes are two of only 100 meromictic lakes in the United States, so named because the deep holes of " dead water " the color of a strong cup of pekoe tea lack oxygen for decomposition and are not stirred by currents.
33.
For this reason, cores of the sediment at the bottom of meromictic lakes are important in tracing past changes in climate at the lake, through examining trapped pollen grains and the types of sediments themselves [ see " Proxy ( climate ) " ].
34.
It encompasses the cliff, plunge basin and basins . "'Glacier Lake "', which occupies the plunge basin of the former waterfall, is in size and deep; it is a rare meromictic lake in which the deep waters don't mix annually with the surface waters.
35.
Gazetted in 2003, the Penang National Park ( the country's smallest at 2, 562 hectares ) at the northwestern tip of Penang island boasts of a lowland dipterocarp forest, mangroves, wetlands, a meromictic lake, mud flats, coral reefs and turtle nesting beaches in addition to a rich diversity of birdlife.
36.
The accumulation of dissolved carbon dioxide in three meromictic lakes in Africa ( Lake Nyos and Lake Monoun in Cameroon and Lake Kivu in Rwanda ) is potentially dangerous because if one of these lakes is triggered into limnic eruption, a very large quantity of carbon dioxide can quickly leave the lake and displace the oxygen needed for life by people and animals in the surrounding area.
