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National Committee on Marine Sciences (NCMS)

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Ocean Decade Challenge: search.filters.odc.Challenge 7: Expand the Global Ocean Observing SystemScientific name: search.filters.scientificname.Halophila

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    Indo-West Pacific affinities of Philippine seagrasses
    Fortes, M. D. (Walter de Gruyter, 1988)
    A dendrograph was developed to depict the mutual relationships among 27 Indo-Pacific countries with similar seagrass floras. Hierarchical (cluster) analysis of the resulting affinities provides strong evidence that the countries could be partitioned into seven discrete provinces. The genus Halophila represents a major connection between most of these provinces, strongly influencing the clustering of the Seagrasses. The degree of species overlap (9.5 — 46.2%) between Province A (where Philippines belongs) and Province G (Western, Southern, and Southeastern portions of Australia) favors vicariance as an explanation. The separation of Kampuchea as a discrete unit within Province A appears to be an artifact of collection rather than a reflection of the true floral affinities in the region. The lack of sufficient basic floristic information remains as the most serious limitation in any attempt to describe the phytogeographic affinities of seagrasses in the Indo-Pacific region.