The Diel and Seasonal Heterogeneity of Carbonate Chemistry and Dissolved Oxygen in Three Types of Macroalgal Habitats SCIE SCOPUS

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Title
The Diel and Seasonal Heterogeneity of Carbonate Chemistry and Dissolved Oxygen in Three Types of Macroalgal Habitats
Author(s)
Li, Huiru; Moon, Hanbi; Kang, Eun Ju; Kim, Ja-Myung; Kim, Miok; Lee, Kitack; Kwak, Cheol-Woo; Kim, Haryun; Kim, Il-Nam; Park, Ki Yeol; Lee, Young Kweon; Jin, Ji Woong; Edwards, Matthew S.; Kim, Ju-Hyoung
KIOST Author(s)
Moon, Han Bi(문한비)KIM, Ha Ryun(김하련)
Alternative Author(s)
문한비; 김하련
Publication Year
2022-05
Abstract
As concerns about ocean acidification continue to grow, the importance of macroalgal communities in buffering coastal seawater biogeochemistry through their metabolisms is gaining more attention. However, studies on diel and seasonal fluctuations in seawater chemistry within these communities are still rare. Here, we characterized the spatial and temporal heterogeneity in diel and seasonal dynamics of seawater carbonate chemistry and dissolved oxygen (DO) in three types of macroalgal habitats (UAM: ulvoid algal mat dominated, TAM: turf algal mat dominated, and SC: Sargassum horneri and coralline algae dominated). Our results show that diel fluctuations in carbonate parameters and DO varied significantly among habitat types and seasons due to differences in their biological metabolisms (photosynthesis and calcification) and each site's hydrological characteristics. Specifically, carbonate parameters were most affected by biological metabolisms at the SC site, and by environmental variables at the UAM site. Also, we demonstrate that macroalgal communities reduced ocean acidification conditions when ocean temperatures supported photosynthesis and thereby the absorption of dissolved inorganic carbon. However, once temperatures exceeded the optimum ranges for macroalgae, respiration within these communities exceeded photosynthesis and increased CO2 concentrations, thereby exacerbating ocean acidification conditions. We conclude that the seawater carbonate chemistry is strongly influenced by the metabolisms of the dominant macroalgae within these different habitat types, which may, in turn, alter their buffering capacity against ocean acidification.
ISSN
2296-7745
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42507
DOI
10.3389/fmars.2022.857153
Bibliographic Citation
FRONTIERS IN MARINE SCIENCE, v.9, 2022
Publisher
FRONTIERS MEDIA SA
Keywords
biogeochemical interaction; carbonate chemistry; dissolved oxygen; diel fluctuation; macroalgal habitat
Type
Article
Language
English
Document Type
Article
Publisher
FRONTIERS MEDIA SA
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