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Mapping distribution of cysts of recent dinoflagellate and Cochlodinium polykrikoides using next-generation sequencing and morphological approaches in South Sea, Korea
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Mapping distribution of cysts of recent dinoflagellate and Cochlodinium polykrikoides using next-generation sequencing and morphological approaches in South Sea, Korea
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Mapping distribution of cysts of recent dinoflagellate and Cochlodinium polykrikoides using next-generation sequencing and morphological approaches in South Sea, Korea
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Journal Article
Mapping distribution of cysts of recent dinoflagellate and Cochlodinium polykrikoides using next-generation sequencing and morphological approaches in South Sea, Korea
2018
Overview
The total dinoflagellate cyst community and the cysts of
Cochlodinium polykrikoides
in the surface sediments of South Sea (Tongyeong coast), South Korea, were analysed using next-generation sequencing (NGS) and morphological approaches. Dinoflagellate cysts can be highly abundant (111–4,087 cysts g
−1
dry weight) and have diverse species composition. A total of 35 taxa of dinoflagellate cysts representing 16 genera, 21 species (including four unconfirmed species), and 14 complex species were identified by NGS analysis. Cysts of
Scrippsiella
spp (mostly
Scrippsiella trochoidea
) were the most dominant and
Polykrikos schwartzii
,
Pentapharsodinium dalei
,
Ensiculifera carinata
, and
Alexandrium catenella/tamarense
were common. Thus, a combination of NGS and morphological analysis is effective for studying the cyst communities present in a given environment. Although
C. polykrikoides
developed massive blooms during 2013–2014, microscopy revealed low density of their cysts, whereas no cysts were detected by NGS. However, the vegetative
C. polykrikoides
not appeared during 2015–2017 in spite of the observation of
C. polykrikoides
cysts. This suggests that the
C. polykrikoides
blooms were not due to development of their cysts but to other factors such as currents transporting them to a marine environment suitable for their growth.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
