Effects of Irradiance and Temperature on the Photosynthesis of the Crustose Coralline Algae Pneophyllum fragile (Corallinales, Rhodophyta) in the Coastal Waters of Korea SCIE SCOPUS

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Title
Effects of Irradiance and Temperature on the Photosynthesis of the Crustose Coralline Algae Pneophyllum fragile (Corallinales, Rhodophyta) in the Coastal Waters of Korea
Author(s)
Baek, Ju Wook; Lee, Jae Seong; Kim, Sung Han; Lee, Tae Hee; Jung, Seung Won; Lee, Won-Chan; Kim, Kyung Tae; An, Sung-Uk
KIOST Author(s)
Baek, ju Wook(백주욱)Lee, Jae Seong(이재성)Kim, Sung Han(김성한)Lee, Tae Hee(이태희)Jung, Seung Won(정승원)Kim, Kyung Tae(김경태)An, Sung-Uk(안성욱)
Alternative Author(s)
백주욱; 이재성; 김성한; 이태희; 정승원; 김경태; 안성욱
Publication Year
2022-07
Abstract
We investigated the photosynthetic characteristics of the crustose coralline alga Pneophyllum fragile (Corallinales, Rhodophyta) according to elevated water temperature and irradiance on the coast of Jeju in 2018. P. fragile was cultured under different temperature (11 °C, 21 °C, 26 °C, and 31 °C) and irradiance (0–1250 μmol photon m−2 s−1) conditions. Oxygen (O2) concentrations at the P. fragile mat–water interface (MWI) were measured using an O2 microsensor. At the MWI, the diffusive boundary layer thicknesses ranged from 200 to 400 μm. The O2 concentrations at the mat surface increased in response to increasing irradiance, and reached 344% air saturation. The maximum photosynthesis capacity (Pmax) and respiration rate in the dark (Rd) at 31 °C were about 3 times higher than those recorded at 11 °C. The compensation irradiance (Ec) and saturation irradiance (Ek) increased with increasing water temperature. The Pmax, Rd, and Ec were statistically correlated with temperature (p < 0.05). The Ek increased up to 833 μmol photon m−2 s−1 at 31 °C and exhibited a strong dependence on irradiance at high temperatures. The adaptability of P. fragile to high temperatures and strong irradiance was distinct from that observed for coralline algae in other temperate waters.
ISSN
2077-1312
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/43052
DOI
10.3390/jmse10070851
Bibliographic Citation
Journal of Marine Science and Engineering , v.10, no.7, 2022
Publisher
MDPI AG
Keywords
oxygen microsensor; crustose coralline algae; photosynthesis
Type
Article
Language
English
Document Type
Article
Publisher
MDPI AG
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