ALGAE

  • 제38권2호
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  • Pages.111-126
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  • 2023
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  • 1226-2617(pISSN)
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  • 2093-0860(eISSN)
한국조류학회(藻類) (The Korean Society of Phycology)
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Five phototrophic Scrippsiella species lacking mixotrophic ability and the extended prey spectrum of Scrippsiella acuminata (Thoracosphaerales, Dinophyceae)

  • Ji Hyun You (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Jin Hee Ok (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Hee Chang Kang (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Sang Ah Park (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Se Hee Eom (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Hae Jin Jeong (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University)
  • 투고 : 2023.04.27
  • 심사 : 2023.06.06
  • 발행 : 2023.06.21
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초록

Mixotrophic dinoflagellates act as primary producers, prey, and predators in marine planktonic food webs, whereas exclusively autotrophic dinoflagellates are primary producers and prey. Species of the dinoflagellate genus Scrippsiella are commonly found in marine ecosystems and sometimes cause harmful red tides. Among the 28 formally described Scrippsiella species, S. acuminata has been found to be mixotrophic and two unidentified species have been found to be mixotrophic. To determine whether the other species in this genus are similarly mixotrophic, the mixotrophic ability of S. donghaiensis SDGJ1703, S. lachrymosa SLBS1703, S. masanensis SSMS0908, S. plana SSSH1009A, and S. ramonii VGO1053 was explored using 15 potential prey items, including 2-㎛ fluorescently labeled microspheres (FLM) and heterotrophic bacteria (FLB), the cyanobacterium Synechococcus sp., and various microalgal prey species. The ability of S. acuminata to feed on FLM and FLB was also investigated. We found that S. donghaiensis, S. lachrymosa, S. masanensis, S. plana, and S. ramonii did not feed on any potential prey tested in this study, indicating a lack of mixotrophy. However, S. acuminata fed on both FLM and FLB, confirming its mixotrophic ability. These results lowered the proportion of mixotrophic species relative to the total number of tested Scrippsiella species for mixotrophy from 100% to 29-38%. Owing to its mixotrophic ability, S. acuminata occupies an ecological niche that is distinct from that of S. donghaiensis, S. lachrymosa, S. masanensis, S. plana, and S. ramonii.

키워드

과제정보

We thank editors and reviewers for their valuable comments. This research was supported by Korea Institute of Marine Science & Technology Promotion (KIMST) funded by the Ministry of Oceans and Fisheries (20230018) and the National Research Foundation of Korea funded by the Ministry of Science and ICT (NRF-2021M3I6A1091272; NRF-2021R1A2C1093379) award to HJJ.

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