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  • Author Secretariat of the Pacific Regional Environment Programme
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Review and recommendations regarding human activity surveillance technologies in Pacific marine protected areas = Synthese et recommandations sur les technologies de surveillance des activités humaines dans les Aires marines protégées du Pacifique.
Available Online

Agence Francaise pour la Biodiversité.

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European Union

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Secretariat of the Pacific Regional Environment Programme

2018
The present study, commissioned by the French Agency for Biodiversity (Agence française pour la biodiversité, AFB), is part of the "Pacific Biodiversity Blue Belt" project. It covers four Pacific island Overseas Countries and Territories (OCTs): French Polynesia (PF), New Caledonia (NC), Wallis & Futuna (WF) and Pitcairn (Pi). |Dans le cadre du projet Pacific Biodiversity Blue Belt BEST2.0, coordonné par le Programme Régional Océanien pour l’Environnement (PROE), en partenariat avec l’Agence française pour la biodiversité (AFB), une étude a été réalisée en 2018 à destination des gestionnaires afin de proposer un outil d’aide à la décision relative à l’utilisation de technologies de surveillance des activités humaines dans les aires marines protégées/gérées. Cette étude propose une synthèse des contextes, des activités maritimes et des dispositifs actuels de surveillance, enrichie d'une revue complète des technologies de 2018 adaptées à la surveillance des activités anthropiques en mer. Un outil d’aide à la sélection de solutions technologiques est ensuite présenté, fondé sur une approche multicritères répondant aux besoins exprimés par les gestionnaires.
Invasive rat eradication strongly impacts plant recruitment on a tropical atoll
BRB
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Croll, Donald A.

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Dirzo, Rodolfo.

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Holmes, Nick D.

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Kropidlowski, Stefan.

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McKown, Matthew.

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Tershy, Bernie R.

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Wegmann, Alexander S.

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Wolf, Coral A.

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Young, Hillary S.

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Zilliacus, Kelly M.

2018
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.