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Short-term response of the coccolithophore Emiliania huxleyi to an abrupt change in seawater carbon dioxide concentrations
Citation
Barcelos e Ramos, J and Muller, MN and Riebesell, U, Short-term response of the coccolithophore Emiliania huxleyi to an abrupt change in seawater carbon dioxide concentrations, Biogeosciences, 7, (1) pp. 177-186. ISSN 1726-4170 (2010) [Refereed Article]
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Copyright Statement
Copyright © The author(s) 2010. This work is distributed under the Creative Commons Attribution 3.0 License.
Official URL: http://www.biogeosciences.net/
DOI: doi:10.5194/bg-7-177-2010
Abstract
The response of the coccolithophore Emiliania
huxleyi to rising CO2 concentrations is well documented
for acclimated cultures where cells are exposed to the CO2
treatments for several generations prior to the experiment.
The exact number of generations required for acclimation
to CO2-induced changes in seawater carbonate chemistry,
however, is unknown. Here we show that Emiliania huxleyi's
short-term response (26 h) after cultures (grown at
500 uatm) were abruptly exposed to changed CO2 concentrations
(~190, 410, 800 and 1500 uatm) is similar to that obtained
with acclimated cultures under comparable conditions
in earlier studies. Most importantly, from the lower CO2 levels
(190 and 410 uatm) to 750 and 1500 uatm calcification decreased
and organic carbon fixation increased within the first
8 to 14 h after exposing the cultures to changes in carbonate
chemistry. This suggests that Emiliania huxleyi rapidly alters
the rates of essential metabolical processes in response
to changes in seawater carbonate chemistry, establishing a
new physiological "state" (acclimation) within a matter of
hours. If this relatively rapid response applies to other phytoplankton
species, it may simplify interpretation of studies
with natural communities (e.g. mesocosm studies and shipboard
incubations), where often it is not feasible to allow for
a pre-conditioning phase before starting experimental incubations.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Research Division: | Earth Sciences |
| Research Group: | Oceanography |
| Research Field: | Biological oceanography |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Effects of climate change on the South Pacific (excl. Australia and New Zealand) (excl. social impacts) |
| UTAS Author: | Muller, MN (Dr Marius Muller) |
| ID Code: | 72199 |
| Year Published: | 2010 |
| Web of Science® Times Cited: | 49 |
| Deposited By: | IMAS Research and Education Centre |
| Deposited On: | 2011-08-23 |
| Last Modified: | 2022-08-25 |
| Downloads: | 403 View Download Statistics |
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