Sites prioritaires pour la conservation des oiseaux marins et des tortues marines des atolls Chesterfield-Bampton et Bellona

Abstract : The Chesterfield-Bampton and Bellona atolls, hitherto preserved by their remoteness from human activities, are among the last refuges of tropical marine biodiversity. The conservation significance of the islets and sandy cays of these atolls was here assessed from a compilation of seabird counts produced by various authors over the last three decades. The islets were ranked individually according to population size by species and three biodiversity indices (species richness, Shannon diversity, population weight by species in relation to the total). A principal component analysis distinguished three homogeneous sets of islets and sandy cays that differed by their total abundance of seabirds, as well as by their biodiversity. The ranking obtained here differs significantly from that decreed by the government of New Caledonia, where, in particular, islets Mouillage no. 2, Mouillage no. 3 and Loop are excluded from the list of so-called "integral" reserves. These islets here appeared as a priority for the conservation of the seabirds of the Chesterfield-Bampton and Bellona atolls. The importance of the Chesterfield’s "V" for the reproduction of 12 species of seabirds, as well as for the green turtle, is here confirmed. The fragmentation of this site into two categories of islets as defined by the government, one said to be protected from human activities, the other open to activities deleterious to the reproduction of seabirds and sea turtles is arbitrary.
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Submitted on : Saturday, July 13, 2019 - 10:10:28 PM
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Philippe Borsa. Sites prioritaires pour la conservation des oiseaux marins et des tortues marines des atolls Chesterfield-Bampton et Bellona. [Rapport de recherche] PNMC 3, Institut de recherche pour le developpement (IRD). 2019, pp.27. ⟨ird-02049265v4⟩

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