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L'objectif de l'étude est de proposer un cadre juridique propice à la biosécurité de Wallis et Futuna, qui réinvestisse les dispositions préexistantes en les étoffant et les renforçant. Cela répond à un contexte où les textes relatifs à la biosécurité de Wallis-et-Futuna étais épars, hétérogènes et en partie obsolètes. Les enjeux de biosécurité poussent à la réflexion vers un corpus complet, cohérent et actualisé en la matière. Le droit international et régional, notamment les directives de Port-Moresby de 2007, permettent d’alimenter la réflexion en la matière. Pour réaliser cette proposition ont été réalisés : (i) des entretiens, (ii) des analyses bibliographiques et synthèses de doctrine, de droit comparé, de droit régional, de droit international, proposition légistique et (iii) des analyses bibliographiques, propositions de listes et de fiches techniques.

Rat eradication has become a common conservation intervention in island ecosystems and its effectiveness in protecting native vertebrates is increasingly well documented. Yet, the impacts of rat eradication on plant communities remain poorly understood. Here we compare native and non-native tree and palm seedling abundance before and after eradication of invasive rats (Rattus Rattus) from Palmyra Atoll, Line Islands, Central Pacific Ocean. Overall, seedling recruitment increased for five of the six native trees species examined. While pre-eradication monitoring found no seedlings of Pisonia grandis, a dominant tree species that is important throughout the Pacific region, post-eradication monitoring documented a notable recruitment event immediately following eradication, with up to 688 individual P. grandis seedlings per 100m2 recorded one month post-eradication. Two other locally rare native trees with no observed recruitment in pre-eradication surveys had recruitment post-rat eradication. However, we also found, by five years post-eradication, a 13-fold increase in recruitment of the naturalized and range-expanding coconut palm Cocos nucifera. Our results emphasize the strong effects that a rat eradication can have on tree recruitment with expected long-term effects on canopy composition. Rat eradication released nonnative C. nucifera, likely with long-term implications for community composition, potentially necessitating future management interventions. Eradication, nevertheless, greatly benefited recruitment of native tree species. If this pattern persists over time, we expect long-term benefits for flora and fauna dependent on these native species.

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