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N(2)O evolution by green algae
1Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, Massachusetts 01609.
Applied and Environmental Microbiology
|December 1, 1984
Summary
Certain green algae, including Chlorella and Scenedesmus, produce nitrous oxide (N2O) when cultured with nitrite (NO2). This research identifies Chlorophyceae as a significant source of N2O in aquatic environments.
Area of Science:
- Environmental microbiology
- Aquatic ecology
- Biogeochemical cycles
Background:
- Nitrous oxide (N2O) is a potent greenhouse gas with significant environmental implications.
- The contribution of different aquatic microorganisms to N2O production is not fully understood.
Purpose of the Study:
- To investigate the potential of specific freshwater green algae to produce N2O.
- To identify Chlorophyceae as a source of N2O in aquatic ecosystems.
Main Methods:
- Axenic cultures of Chlorella, Scenedesmus, Coelastrum, and Chlorococcum were grown under controlled conditions.
- The production of N2O was measured when these algae were supplied with nitrite (NO2) as a nitrogen source.
Main Results:
- All tested axenic cultures of Chlorella, Scenedesmus, Coelastrum, and Chlorococcum spp. evolved N2O.
- The results demonstrate that these Chlorophyceae species are capable of N2O production.
Conclusions:
- Freshwater green algae belonging to the Chlorophyceae class are a source of N2O in aquatic systems.
- This finding contributes to understanding the sources and cycling of N2O in the environment.