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Harmful algal blooms: mechanisms, monitoring, and prevention in a rapidly changing world
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The biology and ecology of typical marine parasitic dinoflagellates
Wednesday 9th @ 0950-1010, Multifunction Hall
Caiwen Li* , Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences,
Meng Li, Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences,
Tiantian Chen, Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences,
Shuqun Song, Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences,
Yun Liu,
Presenter Email: cwli@qdio.ac.cn |
| Parasitic dinoflagellate represents a broad class of dinoflagellates living and proliferating inside hosts of phytoplankton, crustacean, ciliates etc., and they are widely distributed throughout eutrophic coastal waters as well as in oligotrophic oceanic waters. Parasitic dinofalgellates are important components of marine food webs, and their ecological significances have been gradually recognized in latest years by researchers around the world. Among these parasitic dinoflagelllates, the extracellular parasitic dinoflagellate Hematodinium had severely impacted various stocks of commercial valuable crustacean fisheries worldwidely. While, the intracellular parasitic dinoflagellate Amoebophrya can infect specific types of bloom-forming marine dinoflagellates, and plays a top-down control role to their host populations. Lately, these two types of parasitic dinoflagellates have been identified and reported along the coastal lines of China. However, very limited studies had been conducted on parasitic dinoflagellates, with a few limited to the molecular detections and identification of parasitic dinoflagellates, nevertheless the ecological significance of parasitic dinoflagellates in marine ecosystem. Over the last few years, my group studied the distribution and genetic diversity of Amoebophrya in the coastal waters of China through large-scale ecological survey. A typical strain of the parasites was isolated and cultured in laboratory, its infectivity and effect to host dinoflagellates was further investigated to assess the impacts of Amoebophrya infections during dinoflagellate blooms. We also investigated the life cycle of Hematodinium infecting the Chinese Swimming crab Portunus trituberculatus. Its epidemiology, pathogenic and transmission mechanism, and host-parasite interaction were comprehensively studied. Our results manifested the ecological significance of parasitic dinoflagellates in controlling the population of host organisms, and promote the fundamental understanding on the parasitic life style of marine dinoflagellates. |
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