 |
| Titel |
Effects of changes in carbonate chemistry speciation on Coccolithus braarudii: a discussion of coccolithophorid sensitivities |
| VerfasserIn |
S. A. Krug, K. G. Schulz, U. Riebesell |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1726-4170
|
| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 3 ; Nr. 8, no. 3 (2011-03-24), S.771-777 |
| Datensatznummer |
250005577
|
| Publikation (Nr.) |
 copernicus.org/bg-8-771-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| Ocean acidification and associated shifts in carbonate chemistry speciation
induced by increasing levels of atmospheric carbon dioxide (CO2) have
the potential to impact marine biota in various ways. The process of
biogenic calcification, for instance, is usually shown to be negatively
affected. In coccolithophores, an important group of pelagic calcifiers,
changes in cellular calcification rates in response to changing ocean
carbonate chemistry appear to differ among species. By applying a wider
CO2 range we show that a species previously reported insensitive to
seawater acidification, Coccolithus braarudii, responds both in terms of calcification and
photosynthesis, although at higher levels of CO2. Thus, observed
differences between species seem to be related to individual sensitivities
while the underlying mechanisms could be the same. On this basis we develop
a conceptual model of coccolithophorid calcification and photosynthesis in
response to CO2-induced changes in seawater carbonate chemistry
speciation. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|