지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
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 CO<sub>2</sub> 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 CO<sub>2</sub> concentrations: ambient (×1) and elevated CO<sub>2</sub> (2× and 4× 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 CO<sub>2</sub> concentrations. Most notably, photosynthesis and growth increased in S. thunbergii when exposed to elevated CO<sub>2</sub> conditions but decreased in P. cornea. The preference for different inorganic carbon species (CO<sub>2</sub> and HCO<sub>3</sub><sup>−</sup>), 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 CO<sub>2</sub> treatments. Specifically, the two Sargassum species exhibited decreased eCA inhibition of photosynthesis with increased growth when exposed to high CO<sub>2</sub> conditions. In contrast, growth of U. pertusa and C. fragile were not notably affected by increased CO<sub>2</sub>. 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.
목차
등록된 정보가 없습니다.
참고문헌 (56)
참고문헌 신청
Alexandre, A. / 2012 / Effects of CO2 enrichment on photosynthesis, growth, and nitrogen metabolism of the seagrass Zostera noltii / Ecol. Evol. 2:2625~2635
Baker, N. R. / 2004 / Chlorophyll a Fluorescence:A Signature of Photosynthesis / Springer :65~82
Matthew B. Brown / 2014 / Effects of climate change on the physiology of giant kelp, Macrocystis pyrifera, and grazing by purple urchin, Strongylocentrotus purpuratus / ALGAE 29(3):203~215
Choi, T. S. / 2004 / Spatial pattern of intertidal macroalgal assemblages associated with tidal levels / Hydrobiologia 512:49~56
Connell, S. D. / 2010 / The direct effects of increasing CO2 and temperature on non-calcifying organisms : increasing the potential for phase shifts in kelp forests / Proc. Biol. Sci. 277:1409~1415
Baker, N. R. / 2004 / Chlorophyll a Fluorescence:A Signature of Photosynthesis / Springer :65~82
Matthew B. Brown / 2014 / Effects of climate change on the physiology of giant kelp, Macrocystis pyrifera, and grazing by purple urchin, Strongylocentrotus purpuratus / ALGAE 29(3):203~215
Choi, T. S. / 2004 / Spatial pattern of intertidal macroalgal assemblages associated with tidal levels / Hydrobiologia 512:49~56
Connell, S. D. / 2010 / The direct effects of increasing CO2 and temperature on non-calcifying organisms : increasing the potential for phase shifts in kelp forests / Proc. Biol. Sci. 277:1409~1415
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