Because venting groundwater is cold, oxygen-poor, and ion-rich, it is denser than normal lake water, and forms a distinct layer on the lake floor that is as much as 5 m thick, or 22% of the ...

When the temperatures in the water column are at different temperatures throughout, the lake mixes from top to bottom. This allows oxygen-rich water to reach lower depths, providing nutrients to ...

This can have devastating impacts for cold-water species, such as lake trout, that need high-oxygen cold water to survive through the summer months. By using paleolimnology to understand how ...

The oxygen-rich water near the lake’s surface sinks when it cools during the autumn and winter months, lifting the bottom water and allowing the lake waters to mix.

With high carbon dioxide, low oxygen and no photosynthesis, here’s how an entire ecosystem persists in Movile Cave, one of the most extreme environments on Earth.

The authors report that as the climate continues to warm, the size of “dead zones,” low-oxygen areas of lakes and oceans ill-suited to support aquatic life, will also increase. As water temperatures ...

Conditions for effective biomanipulation - conclusions derived from whole-lake experiments in Europe. Hydrobiologia 200, 187-203 (1990). Boyd, C. E. & Tucker, C. S. Pond aquaculture water quality ...

This furry creature is a water vole. Like all mammals, it has a circulation system that's made up of two circuits. Its heart pumps oxygen rich blood around its body and back again. And also pumps ...