Cryptic speciation of benthic Prorocentrum (Dinophyceae) species and their potential as ecological indicators

Wu, Yixuan and Huang, Shuning and Krock, Bernd and Leaw, Chui Pin and Teng, Sing Tung and Piumsomboon, Ajcharaporn and Punnarak, Porntep and Roeroe, Kakaskasen Andreas and Wang, Na and Gu, Haifeng (2022) Cryptic speciation of benthic Prorocentrum (Dinophyceae) species and their potential as ecological indicators. Journal of Sea Research, 190. ISSN 1385-1101, DOI

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The response of marine ecosystems to rapid climate changes has been well recognized but not studied exten-sively. Benthic microalgae, in contrast to the phytoplankton that is able to be transported by currents, have limited dispersal ability and thus are a better ecological indicator to climate changes. Here we performed sampling in the Yellow Sea, the East China Sea and South China Sea and established twenty-six strains of benthic Prorocentrum for detailed morphological and molecular examinations. Five Prorocentrum species, including P. concavum, P. fukuyoi, P. mexicanum, P. tsawwassenense, and P. cf. sculptile, were identified. Both P. concavum and P. fukuyoi displayed marked intraspecific divergences in large subunit (LSU) ribosomal RNA gene sequences, corresponding to their geographical origins. In contrast, P. mexicanum strains shared identical LSU sequence. Prorocentrum tsawwassenense and P. cf. sculptile are not suitable ecological indicators as they were rarely observed. Prorocentrum mexicanum is not recommended either as it is present across the region. In contrast, P. concavum and P. fukuyoi have advantages as ecological indicators for climate changes in the Western Pacific as they comprise several ribotypes with differentiated biogeography. Toxin analysis was also performed on all five species except P. fukuyoi by liquid chromatography coupled to tandem mass spectrometry, but okadaic acid was not detectable.

Item Type: Article
Funders: National Natural Science Foundation of China (NSFC) (Grant No: 42030404), China-Indonesia Maritime Cooperation Fund 'Development of Indonesia-China Center for Ocean Climate', Asian Cooperation Fund Project-Study on Typical Bay Ecological Protection and Management Demonstration, Fund Project for Marine and Fishery Protection and Development in Fujian Province (Grant No: FZJZ-2021-1), Helmholtz-Gemeinschaft Deutscher Forschungszentren through the research program "Changing Earth - Sus-taining our Future" of the Alfred Wegener Institut-Helmholtz Zentrum fuer Polar- und Meeresforschung
Uncontrolled Keywords: Climate change; Cryptic species; Dinoflagellates; Indicator species; Molecular phylogeny; Okadaic acid
Subjects: G Geography. Anthropology. Recreation > GC Oceanography
Q Science > QH Natural history > QH301 Biology
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 14 Nov 2023 04:18
Last Modified: 14 Nov 2023 04:18

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