CSERD: Dissolved Oxygen Model

Title	Dissolved Oxygen Model
Url	http://www.shodor.org/refdesk/Resources/Models/DissolvedOxygen/index.php
Creator	Steve Gordon
Contributor	None listed
Publisher	None listed
Description	One of the most important measures of the health of the stream is the level of dissolved oxygen (DO) in the water. Oxygen (O2) dissolves in water through the mixing of the water surface with the atmosphere. The oxygen is used by fish and other animals in the water to "breath" through their gills or other respiratory systems and by plants. If the levels fall too low, many species of fish, macroinvertebrates, and plants cannot survive. At very low levels of oxygen, the stream becomes "septic" and smells rotten because low oxygen sulfur bacteria begin to dominate.
Format	None listed
Language	English
Subject	Earth Sciences
Keyword	None listed
Audience	Educator, Learner/Student
Education Level	Higher Education, Middle School, Grade 9, Grade 8, Grade 7, High School, Grade 12, Grade 11, Grade 10
Type	Instructional Material