Skip to main content

Stimulation of photosynthesis and consequent oxygen production in anoxic bottom water by supply of low-intensity light through an optical fiber

Buy Article:

$51.00 plus tax (Refund Policy)



 In order to enhance the oxygen production in anoxic bottom water using light, the bottom water and sediment collected in different seasons from a coastal area were incubated under irradiance treatments of 7 and 15 µE/m2 per s by halogen lamp provided through an optical fiber. The dissolved oxygen (DO) concentrations increased from 3.6 mg/L to 7.1 mg/L in the 15 µE/m2 per s irradiance treatment, while in the dark control the DO concentrations decreased to 1.1 mg/L in June. Along with the oxygen increase, chlorophyll a concentration increased from 0.24 µg/L to 1.35 µg/L while inorganic nitrogen and phosphorus decreased. These results indicate that low-intensity light is effective in stimulating photosynthesis of coastal bottom water and for net production of DO, especially in summer. It is a promising way to improve the anoxic bottom environment.

Keywords: anoxic; irradiance; optical fiber; oxygen production; photosynthesis

Document Type: Research Article


Affiliations: Laboratory of Aquatic Environmental Science, Kochi University, Nankoku, Kochi 783-8502, Japan

Publication date: June 1, 2004


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more