2020 Fiscal Year Annual Research Report
Interplay between speciation and adaptation: an 'Omics' study on the effects of human impacts on Mediterranean and Indo-Pacific Zoantharia
| Project/Area Number |
18F18755
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
Reimer J・D 琉球大学, 理学部, 准教授 (20452956)
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| Co-Investigator(Kenkyū-buntansha) |
POLISENO ANGELO 琉球大学, 理学部, 外国人特別研究員
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| Project Period (FY) |
2018-11-09 – 2021-03-31
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| Keywords | Zoantharia / Anthozoa / marine biodiversity / population genomics |
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| Outline of Annual Research Achievements |
Using a molecular approach and High Throughput Sequencing (HTS) technologies, Dr. Poliseno explored the intra-specific diversity and population structure of the Atlantic-Mediterranean zoantharian Savaglia savalia. Dr. Poliseno investigated the genetic diversity of the Indo-Pacific sponge associated zoantharian Umimayanthus and their hosts. Finally, given the high abundance and diversity observed in the field, the fellow conducted a biodiversity survey of the gorgonian octocorals collected from Okinawajima island and other islands of southern Japan.
For population genomics of Savalia savaglia Dr. Poliseno found that individuals collected from 5 geographical distinct areas across the Mediterranean basin (France, Montenegro, Apulia and Sardinia - Italy) and eastern Atlantic (Portugal) grouped into three distinct clusters. Our results showed that asexual reproduction may possibly explain the presence of clonal individuals within some populations. Dr. Poliseno did not find any correlation between geographic distance and genetic structure, whereas we observed that populations at greater depths are genetically more similar, whereas those from shallower areas are very distinct from each-other.
The analyses on the diversity of the sponge associated zoantharian Umimayanthus and their hosts suggest the lack of species-specific association. In particular Dr. Poliseno found that, for the specimens investigated, the sponges associated with Unimayanthus belong to at least five genera (e.g. Agelas, Clathria, Cliona, Hymeniacidon and Spirastrella).
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| Research Progress Status |
令和2年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和2年度が最終年度であるため、記入しない。
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