 |
| Titel |
Impact of ocean acidification on a key Arctic pelagic mollusc (Limacina helicina) |
| VerfasserIn |
S. Comeau, G. Gorsky, R. Jeffree, J.-L. Teyssié, J.-P. Gattuso |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 6, no. 9 ; Nr. 6, no. 9 (2009-09-04), S.1877-1882 |
| Datensatznummer |
250003991
|
| Publikation (Nr.) |
 copernicus.org/bg-6-1877-2009.pdf |
|
|
|
|
|
| Zusammenfassung |
| Thecosome pteropods (shelled pelagic molluscs) can play an important role in
the food web of various ecosystems and play a key role in the cycling of
carbon and carbonate. Since they harbor an aragonitic shell, they could be
very sensitive to ocean acidification driven by the increase of
anthropogenic CO2 emissions. The impact of changes in the carbonate
chemistry was investigated on Limacina helicina, a key species of Arctic ecosystems.
Pteropods were kept in culture under controlled pH conditions corresponding
to pCO2 levels of 350 and 760 μatm. Calcification was estimated
using a fluorochrome and the radioisotope 45Ca. It exhibits a 28%
decrease at the pH value expected for 2100 compared to the present pH value.
This result supports the concern for the future of pteropods in a
high-CO2 world, as well as of those species dependent upon them as a
food resource. A decline of their populations would likely cause dramatic
changes to the structure, function and services of polar ecosystems. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|