1. Pigment Characterization of the Giant-Colony-Forming Haptophyte Phaeocystis globosa in the Beibu Gulf Reveals Blooms of Different Origins.
- Author
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Jin-Xiu Wang, Fan-Zhou Kong, Hui-Xia Geng, Yue Zhao, Wei-Bing Guan, Cheng He, Zhen-Jun Kang, Wei Guo, Zheng-Xi Zhou, Qing-Chun Zhang, and Ren-Cheng Yu
- Subjects
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ALGAL communities , *HIGH performance liquid chromatography , *PIGMENTS , *WATER masses - Abstract
The giant-colony-forming haptophyte Phaeocystis globosa has caused several large-scale blooms in the Beibu Gulf since 2011, but the distribution and dynamics of the blooms remained largely unknown. In this study, colonies of P. globosa, as well as membrane-concentrated phytoplankton samples, were collected during eight cruises in the Beibu Gulf from September 2016 to August 2017. Pigments were analyzed by high-performance liquid chromatography coupled with a diode array detector (HPLC-DAD). The pigment 199-hexanoyloxyfucoxanthin (hexfuco), generally considered a diagnostic pigment for Phaeocystis, was not detected in P. globosa colonies in the Beibu Gulf, whereas 199-butanoyloxyfucoxanthin (butfuco) was found in all colony samples. Moreover, but-fuco in membrane-concentrated phytoplankton samples exhibited a similar distribution pattern to that of P. globosa colonies, suggesting that but-fuco provided the diagnostic pigment for bloom-forming P. globosa in the Beibu Gulf. Based on the distribution of but-fuco in different water masses in the region prior to the formation of intensive blooms, it is suggested that P. globosa blooms in the Beibu Gulf could originate from two different sources. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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