期刊
GEOPHYSICAL RESEARCH LETTERS
卷 48, 期 5, 页码 -出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2020GL091499
关键词
calcium carbonate; crustose coralline algae; density; global warming; high‐ latitude; ocean acidification
资金
- US National Science Foundation [1459827, 1459706, 1316141]
- Directorate For Geosciences
- Division Of Ocean Sciences [1459827] Funding Source: National Science Foundation
- Directorate For Geosciences
- Division Of Ocean Sciences [1459706] Funding Source: National Science Foundation
The skeletal density of high-latitude species of crustose coralline algae (CCA) significantly declined under future pCO2 conditions, potentially increasing their vulnerability to disturbance and impairing their ability to produce critical habitat in high-latitude systems.
Crustose coralline algae (CCA) function as foundation species by creating marine carbonate hardground habitats. High-latitude species may be vulnerable to regional warming and acidification. Here, we report the results of an experiment investigating the impacts of CO2-induced acidification (pCO(2) similar to 350, 490, 890, 3,200 mu atm) and temperature (similar to 6.5 degrees C, 8.5 degrees C, 12.5 degrees C) on the skeletal density of two species of high-latitude CCA: Clathromorphum compactum and Clathromorphum nereostratum (CN). Skeletal density of both species significantly declined with pCO(2). In CN, the density of previously deposited skeleton declined in the highest pCO(2) treatment. This species was also unable to precipitate new skeleton at 12.5 degrees C, suggesting that CN will be particularly sensitive to future warming and acidification. The decline in skeletal density exhibited by both species under future pCO(2) conditions could reduce their skeletal strength, potentially rendering them more vulnerable to disturbance, and impairing their production of critical habitat in high-latitude systems.
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