鞭毛藻類の生活史とその戦略の多様性

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  • ベンモウソウルイ ノ セイカツシ ト ソノ センリャク ノ タヨウセイ

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Many planktonic microalgal flagcllates，living in seasonally variable environments，have resting stage cells such as resting cysts in their life cycles. The resting stage cells play crucial roles in survival under adverse conditions for vegetative cells and in seeding blooms. Therefore， elucidating the life cycles of microalgal flagellates is important to get a better understanding not only of their individual population dynamics but also the mechanisms of species succession in marine and freshwater ecosystems. Here we focused on dinoflagellates and raphidophytes (ChattoneLla antiqua and C. marina) among the microalgal flagellates and introduce their diverse life cycles. Furthermore， their life cycle strategies to survive and proliferate in some waters were discussed based on the different dormancy periods (maturation period before germination) of the resting cysts. We believe that the biodiversity of microalgal flagellates observed in seasonally variable environments was strongly supported by the diverse patterns of life cycles and life cycle strategies themselves.

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