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Original Articles

Effect of Elevated CO2 and Temperature on the Growth, Photosynthetic Pigments and Nutrient Uptake of Grateloupia filicina

이산화탄소 농도 및 온도 상승이 지누아리의 생장, 광합성 색소, 영양염 흡수에 미치는 영향

Ji-Sook Park1
,
Jeong Hwa Hwang2
,
Hye-In Song2
,
Hyun Il Yoo3
,
Jang Kyun Kim12*
박 지숙1
,
황 정화2
,
송 혜인2
,
유 현일3
,
김 장균12*
1Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Korea
2Department of Marine Science, Incheon National University, Incheon 22012, Korea
3Fisheries Seed and Breeding Research Institute, NIFS, Jeollanam-do 59002 , Korea
1인천대학교 해양학과
2인천대학교 기초과학연구소
3국립수산과학원 수산종자육종연구소
*Corresponding Author
30 June 2021. pp. 37-45
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Abstract

Ocean acidification and global warming have been environment concerns worldwide. A red alga, Grateloupia filicina, is known as a cosmopolitan species, inhabiting in all continents except for Antarctica. This study was to determine the effect of elevated CO2 and temperature on G. filicina. G. filicina blades were exposed to 500 (control), 900 and 1,800 ppm of CO2 at 18 and 25°C for 20 days. In addition, to determine the effect of aeration, a blank control without seaweed was placed at the same conditions. Specific growth rate (RGR), photosynthetic pigments (PE: Phycoerythrin; PC: Phycocyanin; Chlorophyll a; and Carotenoids) and nutrients (phosphorus and nitrate) uptake rates were measured every 5 days. No significant differences of photosynthetic pigments were observed at all conditions. CO2 did not affect RGR, but the high temperature (25°C) significantly reduced the growth of G. filicina when cultivated at 1,800 ppm. Maximum phosphorus and nitrate uptake rates were decreased as temperature and CO2 concentration increased. These results suggest that the combined effects of ocean acidification and warming may negatively affect the growth and nutrient uptake of G. filicina.

Keywords
global warming
Grateloupia filicina
growth
nutrient uptake
ocean acidification
photosynthetic pigments

해양 산성화와 지구 온난화는 전 세계적으로 공통적인 환경문제로 대두되고 있다. 홍조류 지누아리(Grateloupia filicina)는 한국뿐 아니라 전 세계에 분포하고 있는 해조류로써 본 연구는 상승하는 이산화탄소 농도와 온도가 지누아리에 미치는 영향을 평가하기 위해 수행되었다. 지누아리 엽체를 18°C와 25°C 온도조건에서 20일간 500, 900, 1,800 ppm 농도의 이산화탄소에 노출시켜 배양하였다. 또한 폭기(aeration)의 효과를 판단하기 위해 지누아리 엽체를 넣지 않은 대조군도 같은 조건에서 배양하였다. 상대생장률(RGR), 광합성 색소 함량(R-phycoerythrin, R-phycocyanin, Chlorophyll a, Carotenoids), 영양염(인산염, 질산염) 흡수율을 매 5일간격으로 측정하였다. 상대생장률의 경우 이산화탄소 농도에 의한 영향이 나타나지 않았으나 고온(25°C), 고농도의 이산화탄소(1,800 ppm) 조건에서 현저하게 감소하였다. 광합성 색소의 경우 조건별 차이가 나타나지 않았다. 이산화탄소와 온도가 상승하면서 영양염 최대 흡수율이 감소하는 결과를 보였다. 이러한 결과는 해양 산성화와 온난화의 복합적인 영향이 지누아리의 성장과 영양소 섭취에 부정적인 영향을 미칠 수 있음을 간접적으로 보여준다.

키워드
광합성 색소
생장률
영양염 흡수율
지구온난화
지누아리
해양 산성화
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Information
  • Publisher :The Korean Society of Phycology
  • Publisher(Ko) :한국조류학회
  • Journal Title :Aquatic Nature
  • Journal Title(Ko) :수생생물
  • Volume : 1
  • No :1
  • Pages :37-45
  • Received Date : 2021-05-12
  • Revised Date : 2021-06-21
  • Accepted Date : 2021-06-22
  • DOI :https://doi.org/10.23135/an.2021.1.1.4
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