期刊
SCIENCE
卷 327, 期 5966, 页码 676-679出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1183517
关键词
-
资金
- NSF
- BP and Ford Motor Company
- Directorate For Geosciences
- Division Of Ocean Sciences [0825192] Funding Source: National Science Foundation
The acidification caused by the dissolution of anthropogenic carbon dioxide (CO(2)) in the ocean changes the chemistry and hence the bioavailability of iron (Fe), a limiting nutrient in large oceanic regions. Here, we show that the bioavailability of dissolved Fe may decline because of ocean acidification. Acidification of media containing various Fe compounds decreases the Fe uptake rate of diatoms and coccolithophores to an extent predicted by the changes in Fe chemistry. A slower Fe uptake by a model diatom with decreasing pH is also seen in experiments with Atlantic surface water. The Fe requirement of model phytoplankton remains unchanged with increasing CO(2). The ongoing acidification of seawater is likely to increase the Fe stress of phytoplankton populations in some areas of the ocean.
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