Dictionary > Dissolved oxygen

Dissolved oxygen

Definition
noun
The amount of free oxygen dissolved in water, expressed in mg/L, parts per million (ppm), or in percent of saturation, i.e. where saturation pertains to the maximum amount of oxygen that can be dissolved theoretically in water at a particular altitude and temperature
Supplement
In biology, the oxygen plays a crucial role in various biochemical and physiological processes. One of these processes is cellular respiration. The presence of oxygen makes cellular respiration about ten times more efficient in yielding ATP.1 Dissolved oxygen pertains to the amount of free oxygen that is dissolved in water. It may be expressed in mg/L, parts per million (ppm), or in percent of saturation. Saturation, in this regard, is the maximum amount of oxygen that can theoretically be dissolved in water at a given altitude and temperature.
The amount of free oxygen that is dissolved in water is measured since it can be used as an indication of the ability of a particular aquatic habitat to support living organisms living in it. It tells the amount of free oxygen that is available for organisms to use. A high or a low concentration of free oxygen in an aquatic habitat affects the water quality as well as the organisms in it. Thus, this parameter is often measured in order to determine the quality of water and assess its ability to support life.
Water temperature, pressure, and biological activity can affect the level of free oxygen dissolved in water.
Abbreviation / Acronym: DO
See also:

  • oxygen
  • water
  • Aquic moisture regime
  • Azorhizobium caulinodans

Reference(s):

1 Oxygen. Retrieved from ://www.biologyonline.com/dictionary/Oxygen.


You will also like...

Direct and indirect physiologic effects of growth hormone
Animal Growth Hormones

Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

dinosaurs
The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

Homeostasis by water regulation
Homeostasis of Organism Water Regulation

Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Human perception in action
Human Perception – Neurology

This tutorial investigates perception as two people can interpret the same thing differently. Know more about human perc..

Origins of Life on Earth
Origins of Life on Earth

Earth was created around 4.5 billion years ago and life began not long after. Primitive life likely possessed the elemen..