Ocean acidification: the other CO2 problem

Area of Science:

• Marine Biology
• Oceanography
• Environmental Chemistry

Background:

• Rising atmospheric carbon dioxide (CO2) from human activities is increasing ocean acidity.
• Ocean acidification alters seawater chemistry, affecting marine ecosystems globally.
• The rate of ocean acidification is projected to accelerate this century.

Purpose of the Study:

• To document the effects of ocean acidification on marine organisms.
• To investigate the impact of changing seawater chemistry on biogeochemical cycles.
• To highlight research priorities concerning marine organism adaptation to CO2.

Main Methods:

• Analysis of field data on ocean acidification.
• Laboratory experiments on calcifying organisms under high-CO2 conditions.
• Review of existing research on ocean acidification impacts.

Main Results:

• Ocean acidification lowers calcium carbonate saturation states, affecting shell-forming organisms.
• Calcifying species show reduced calcification and growth rates in laboratory settings.
• Some photosynthetic organisms exhibit increased carbon fixation rates.

Conclusions:

• Ocean acidification poses significant risks to marine calcifiers and ecosystems.
• The capacity of marine organisms to adapt to increasing CO2 is largely unknown.
• Further research is crucial to predict and mitigate the effects of ocean acidification.