Effects of Increased CO2 and Temperature on the Growth of Four Diatom Species (Chaetoceros debilis, Chaetoceros didymus, Skeletonema costatum and Thalassiosira nordenskioeldii) in Laboratory Experiments KCI

Title
Effects of Increased CO2 and Temperature on the Growth of Four Diatom Species (Chaetoceros debilis, Chaetoceros didymus, Skeletonema costatum and Thalassiosira nordenskioeldii) in Laboratory Experiments
Author(s)
현봉길; 최근형; 장풍국; 장민철; 이우진; 문창호; 신경순
KIOST Author(s)
Hyun, Bonggil(현봉길)Jang, Pung Guk(장풍국)Shin, Kyoungsoon(신경순)
Publication Year
2014-06
Abstract
We examined the combined impacts of future increases of CO2 and temperature on the growth of four marine diatoms (Skeletonema costatum, Chaetoceros debilis, Chaetoceros didymus, Thalassiosira nordenskioeldii). The four strains were incubated under four different conditions: present ( pCO2 : 400ppm, temperature: 20∘C ), acidification ( pCO2 : 1000ppm, temperature: 20∘C ), global warming ( pCO2 : 400ppm, temperature: 25∘C ), and greenhouse ( pCO2 : 1000ppm, temperature: 25∘C ) conditions. Under the condition of higher temperatures, growth of S. costatum was suppressed, while C. debilis showed enhanced growth. Both C. didymus and T. nodenskioldii showed similar growth rates under current and elevated temperature. None of the four species appeared affected in their cell growth by elevated CO2 concentrations. Chetoceros spp. showed increase of pH per unit fluorescence under elevated CO2 concentrations, but no difference in pH from that under current conditions was observed for either S. costatum or T. nodenskioeldii, implying that Chetoceros spp. can take up more CO2 per cell than the other two diatoms. Our results of cell growth and pH change per unit fluorescence suggest that both C. debilis and C. didymus are better adapted to future oceanic conditions of rising water temperature and CO2 than are S. costatum and T. nodenskioeldii.
ISSN
1225-4517
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1597
DOI
10.5322/JESI.2014.23.6.1003
Bibliographic Citation
한국환경과학회지, v.23, no.6, pp.1003 - 1012, 2014
Publisher
한국환경과학회
Keywords
Future temperature and CO2 increase; Acidification; Global warming; Greenhouse; Diatom
Type
Article
Language
English
Publisher
한국환경과학회
Related Researcher
Research Interests

Plankton ecology and physiology,Risk assessment,Ship ballast water,플랑크톤 생리, 생태,위해성평가,선박평형수

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