CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Environmental Chemistry   
Environmental Chemistry
Journal Banner
  Environmental problems - Chemical approaches
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Structure
Online Early
Current Issue
Just Accepted
All Issues
Virtual Issues
Special Issues
Research Fronts
Sample Issue
For Authors
General Information
Submit Article
Author Instructions
Open Access
For Referees
Referee Guidelines
Review an Article
For Subscribers
Subscription Prices
Customer Service

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter LinkedIn


Article << Previous     |     Next >>   Contents Vol 6(5)

Carbon monoxide emissions by phytoplankton: evidence from laboratory experiments

Valérie Gros A E, Ilka Peeken B C D, Katrin Bluhm B, Eckart Zöllner B, Roland Sarda-Esteve A, Bernard Bonsang A

A Laboratoire des Sciences du Climat et de l’Environnement-Unité mixte CEA-CNRS-UVSQ, F-91191 Gif sur Yvette, France.
B IFM-GEOMAR, Leibniz Institute of Marine Sciences, Marine Biogeochemistry, Westshore Building, Duesternbrooker Weg 20, D-24105 Kiel, Germany.
C Center for Marine Environmental Sciences, MARUM, Leobener Strasse, D-28359 Bremen, Germany.
D Alfred-Wegener-Institute for Polar- and Marine Research, Biological Oceanography, Am Handelshafen 12, D-27570 Bremerhaven, Germany.
E Corresponding author. Email: valerie.gros@lsce.ipsl.fr
PDF (838 KB) $25
 Export Citation

Environmental context. Carbon monoxide (CO) is a key component for atmospheric chemistry and its production in the ocean, although minor at the global scale, could play a significant role in the remote marine atmosphere. Up to now, CO production in the ocean was considered to mainly originate from the photo-production of dissolved organic matter (mainly under UV radiation). In this paper, we show evidence for direct production of CO by phytoplankton and we suggest it as a significant mechanism for CO production in the ocean.

Abstract. In order to investigate carbon monoxide (CO) emissions by phytoplankton organisms, a series of laboratory experiments was conducted in Kiel (Germany). Nine monocultures, including diatoms, coccolithophorids, chlorophytes and cyanobacteria have been characterised. This was done by following the CO variations from monoculture aliquots exposed to photosynthetically active radiation during one or two complete diurnal cycles. All the studied cultures have shown significant CO production when illuminated. Emission rates have been estimated to range from 1.4 × 10–5 to 8.7 × 10–4 μg of CO μg chlorophyll–1 h–1 depending on the species. When considering the magnitude of the emission rates from the largest CO emitters (cyanobacteria and diatoms), this biotic source could represent up to 20% of the CO produced in oceanic waters. As global models currently mainly consider CO production from the photo-degradation of dissolved organic matter, this study suggests that biotic CO production should also be taken into account. Whether this biological production might also contribute to some degree to the previous observed non-zero CO production below the euphotic zone (dark CO production) cannot be deduced here and needs to be further investigated.

Keywords: biological production, CO, ocean, monocultures.

Subscriber Login

Legal & Privacy | Contact Us | Help


© CSIRO 1996-2015