Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions
Abstract We measured the concentrations of dissolved inorganic and organic nutrients, dissolved organic carbon (DOC), total hydrolyzable amino acids (THAA), fluorescent dissolved organic matter (FDOM), phytoplankton pigments, and δ13C-DOC during the summer of 2019 in the harmful dinoflagellate bloom...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-09-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-19168-7 |
| _version_ | 1798002988789268480 |
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| author | Jihyun Park Guebuem Kim Hyeong Kyu Kwon Heejun Han Tae Gyu Park Moonho Son |
| author_facet | Jihyun Park Guebuem Kim Hyeong Kyu Kwon Heejun Han Tae Gyu Park Moonho Son |
| author_sort | Jihyun Park |
| collection | DOAJ |
| description | Abstract We measured the concentrations of dissolved inorganic and organic nutrients, dissolved organic carbon (DOC), total hydrolyzable amino acids (THAA), fluorescent dissolved organic matter (FDOM), phytoplankton pigments, and δ13C-DOC during the summer of 2019 in the harmful dinoflagellate bloom regions of the southern coast of Korea. In the harmful dinoflagellate bloom region, the concentrations of inorganic nitrogen were depleted, inhibiting the growth of diatoms, while the concentrations of dissolved organic components (nutrients, DOC, FDOM, and amino acids) which fuel dinoflagellates were unusually high. Thus, we attempted to investigate the origins and characteristics of DOM which fuels the harmful dinoflagellate blooms. The δ13C-DOC values (− 22.2‰ to − 18.2‰) indicate that the elevated DOC concentrations result from in-situ biological production rather than terrestrial inputs. The enantiomeric (D/L) ratios of THAA indicate that dissolved organic nitrogen was more labile in the early stage of harmful dinoflagellate bloom and became more refractory in the final stage. Our results suggest that the marine production of bioavailable DOM plays an important role in initiating and sustaining harmful dinoflagellate blooms. |
| first_indexed | 2024-04-11T12:01:07Z |
| format | Article |
| id | doaj.art-acfb51ded8ed44f98399e3af838011a4 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-11T12:01:07Z |
| publishDate | 2022-09-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-acfb51ded8ed44f98399e3af838011a42022-12-22T04:24:52ZengNature PortfolioScientific Reports2045-23222022-09-0112111110.1038/s41598-022-19168-7Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositionsJihyun Park0Guebuem Kim1Hyeong Kyu Kwon2Heejun Han3Tae Gyu Park4Moonho Son5School of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National UniversitySchool of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National UniversitySchool of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National UniversitySchool of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National UniversitySoutheast Sea Fisheries Research Institute, National Institute of Fisheries ScienceOcean Climate and Ecology Research Division, National Institute of Fisheries ScienceAbstract We measured the concentrations of dissolved inorganic and organic nutrients, dissolved organic carbon (DOC), total hydrolyzable amino acids (THAA), fluorescent dissolved organic matter (FDOM), phytoplankton pigments, and δ13C-DOC during the summer of 2019 in the harmful dinoflagellate bloom regions of the southern coast of Korea. In the harmful dinoflagellate bloom region, the concentrations of inorganic nitrogen were depleted, inhibiting the growth of diatoms, while the concentrations of dissolved organic components (nutrients, DOC, FDOM, and amino acids) which fuel dinoflagellates were unusually high. Thus, we attempted to investigate the origins and characteristics of DOM which fuels the harmful dinoflagellate blooms. The δ13C-DOC values (− 22.2‰ to − 18.2‰) indicate that the elevated DOC concentrations result from in-situ biological production rather than terrestrial inputs. The enantiomeric (D/L) ratios of THAA indicate that dissolved organic nitrogen was more labile in the early stage of harmful dinoflagellate bloom and became more refractory in the final stage. Our results suggest that the marine production of bioavailable DOM plays an important role in initiating and sustaining harmful dinoflagellate blooms.https://doi.org/10.1038/s41598-022-19168-7 |
| spellingShingle | Jihyun Park Guebuem Kim Hyeong Kyu Kwon Heejun Han Tae Gyu Park Moonho Son Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions Scientific Reports |
| title | Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions |
| title_full | Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions |
| title_fullStr | Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions |
| title_full_unstemmed | Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions |
| title_short | Origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13C and d/l-Amino acid compositions |
| title_sort | origins and characteristics of dissolved organic matter fueling harmful dinoflagellate blooms revealed by δ13c and d l amino acid compositions |
| url | https://doi.org/10.1038/s41598-022-19168-7 |
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