Sentences with phrase «dissolved oxygen levels»

The depletion of already low dissolved oxygen levels causes the volume of the OMZs to grow, disrupting primary producers in this and surrounding ecosystems.

This map shows dissolved oxygen levels in the Gulf of Mexico for 2009 in milligrams per liter.

Researchers also found that aquifers with less dissolved oxygen had greater traces of tungsten in the groundwater than aquifers with high dissolved oxygen levels.

A new analysis of nearly five decades of data has revealed the oceans» dissolved oxygen levels started dropping in the 1980s as global temperatures began to climb.

It is the annual blossoming of a zone of low dissolved oxygen levels, anathema to fish, shrimp and other marine life, known colloquially as the «dead zone.»

The pump sends water to a nitrate sensor and a device called a sonde — French for «probe» — that measures water temperature, dissolved oxygen levels, pH and dissolved minerals.

A study of Oregon's Coos Bay shows how the bay's physical features sustain its dissolved oxygen levels while forming a baseline for future research.

I also employ a UV - sterilizer to keep the water crystal clear and two air stones to increase the dissolved oxygen level.