Publications
Detailed Information
Species-specific responses of temperate macroalgae with different photosynthetic strategies to ocean acidification: a mesocosm study
Cited 35 time in
Web of Science
Cited 35 time in Scopus
- Authors
- Issue Date
- 2016-09
- Publisher
- 한국조류학회I
- Citation
- ALGAE, Vol.31 No.3, pp.243-256
- Abstract
- Concerns about how ocean acidification will impact marine organisms have steadily increased in recent years, but there is a lack of knowledge on the responses of macroalgae. Here, we adopt an outdoor continuous-flowing mesocosm system designed for ocean acidification experiment that allows high CO2 conditions to vary with natural fluctuations in the environment. Following the establishment of the mesocosm, five species of macroalgae that are common along the coast of Korea (namely Ulva pertusa, Codium fragile, Sargassum thunbergii, S. horneri, and Prionitis cornea) were exposed to three different CO2 concentrations: ambient (x1) and elevated CO2 (2x and 4x ambient), over two-week period, and their ecophysiological traits were measured. Results indicated that both photosynthesis and growth exhibited species-specific responses to the different CO2 concentrations. Most notably, photosynthesis and growth increased in S. thunbergii when exposed to elevated CO2 conditions but decreased in P. cornea. The preference for different inorganic carbon species (CO, and HCO3-), which were estimated by gross photosynthesis in the presence and absence of the external carbonic anhydrase (eCA) inhibitor acetazolamide, were also found to vary among species and CO2 treatments. Specifically, the two Sargassum species exhibited decreased eCA inhibition of photosynthesis with increased growth when exposed to high CO2 conditions. In contrast, growth of U. pertusa and C. fragile were not notably affected by increased CO2. Together, these results suggest that the five species of macroalgae may respond differently to changes in ocean acidity, with species-specific responses based on their differentiated photosynthetic acclimation. Understanding these physiological changes might allow us to better predict future changes in macroalgal communities in a more acidic ocean.
- ISSN
- 1226-2617
- Files in This Item:
- There are no files associated with this item.
Related Researcher
- College of Natural Sciences
- Department of Earth and Environmental Sciences
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.