When grown under ocean acidification conditions, a non-calcifying seaweed (Chondrus crispus) grew to cover more area, while a calcifying alga (Corallina officinalis) decreased in the area it covered. (Laboratory experiment)
A coralline alga took up and used carbon and nutrients differently when living under ocean acidification conditions for 12 weeks, and the changes affected its ability to compete with other macroalgae (seaweed). (Laboratory study)
Growth and photosynthetic efficiency of a coralline alga decreased under high CO2 levels. These changes could affect the alga's ability to compete with other macroalgae (seaweeds). (Laboratory study)
Weekly growth rate of a cold-water seaweed (Porphyra linearis) averaged 53% in regular air and 28% in CO2-enriched air. (Laboratory study)
When exposed to ocean acidification conditions (pH 7.7) for 80 days, coralline algae survived by increasing their calcification rates. However, those algae for which the pH had been dropped rapidly, rather than slowly and gradually, exhibited weaknesses in their calcite skeletons. (Laboratory study)
Intracellular concentration of DMSP remained unaffected in two macroalgae species (Ulva lactuca and U. clathrata) under ocean acidification conditions, but significant differences in extracellular production of DMSP and DMS occurred in U. lactuca. (Laboratory study)
A non-bicarbonate using red seaweed grew more rapidly with increasing carbon dioxide. (Laboratory study)
Exposure of juvenile green seaweed to ocean acidification conditions for 80 days affected their ability to photosynthesize. (Laboratory study)
Four species of intertidal brown seaweeds increased their uptake of carbon dioxide (CO2) as ambient CO2 concentration increased, while one other species did not. The amount of increased CO2 uptake changed seasonally with temperature, and for one species the results indicated that future impacts of increased CO2 would be greatest ...
In the early life stages of a coralline alga, mortality and growth abnormalities increased with small changes in pH. However, rate of growth remained similar, potentially by re-directing energy from other life processes. (Laboratory study)
