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Mar. Pollut. Bull., Available online 11 June 2020. Volume 157, 111324 | https://doi.org/10.1016/j.marpolbul.2020.111324 Global warming offsets the ecophysiological stress of ocean acidification on temperate crustose coralline algae

Abstract

Ju-Hyoung Kim^a,*, Nahyun Kim^a, Hanbi Moon^a, Sukyeon Lee^a, So Young Jeong^b, Guillermo Diaz-Pulido^b, Matthew S. Edwards^c, Ju-Hyun Kang^a,d, Eun Ju Kang^e, Hyun-Ju Oh^f, Jae-Dong Hwang^f, Il-Nam Kim^e,*

^aFaculty of Marine Applied Biosciences, Kunsan National University, Gunsan 54150, South Korea
^bSchool of Environment and Science and Australian Rivers Institute-Coast & Estuaries, Nathan Campus, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
^cDepartment of Biology, San Diego State University, 5500 Campanile Drive, Physical Sciences 145, San Diego, CA 92182, USA
^dKorea Ocean & Fisheries Institute, Tongyeong 53005, South Korea
^eDepartment of Marine Science, Incheon National University, Incheon 22012, South Korea
^fOceanic Climate and Ecology Research Division, National Institute of Fisheries Science, Busan 46083, South Korea

^*Corresponding author

Abstract
Dramatic increases in the release of anthropogenic CO₂ and global temperatures have resulted in alterations to seawater carbonate chemistry and metabolisms of marine organisms. There has been recent interest in the effects of these stressors on crustose coralline algae (CCA) because photosynthesis and calcification are influenced by all components of carbonate chemistry. To examine this, a mesocosm experiment was conducted to evaluate photosynthesis, calcification and growth in the temperate CCA Chamberlainium sp. under acidification (doubled CO₂), warming (+5 °C), and greenhouse (doubled CO₂ and +5 °C) conditions compared to present-day conditions. After 47 days of acclimation to these conditions, productivity was lowest under acidification, although photochemical properties were improved, while respiration was highest under warming. Likewise, growth was lowest under acidification, but this negative response was offset by elevated temperature under greenhouse. Together, these results suggest that warming offsets the negative effects of acidification by creating more suitable conditions for photosynthesis and growth.

논문정보

형식Research article
게재일2020년 06월 (BRIC 등록일 2020-06-22)
연구진국내(교신)+국외 연구진
분야
구분구・농수식품

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