%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Veron, S.
%A Bernard, A.
%A Lebreton, E.
%A Rodrigues-Vaz, C.
%A Durand, M.
%A Procopio, L.
%A Helion, M.
%A Gayot, M.
%A Viscardi, G.
%A Krupnick, G. A.
%A Carrington, C. M. S.
%A Boullet, V.
%A Mallet, B.
%A Dimassi, A.
%A Pailler, T.
%A Hivert, J.
%A Lebouvier, M.
%A Agnola, P.
%A Bruy, David
%A Gateble, G.
%A Lannuzel, G.
%A Meyer, S.
%A Gargominy, O.
%A Gigot, G.
%A Invernon, V.
%A Leblond, S.
%A Pignal, M.
%A Tercerie, S.
%A Muller, S.
%A Rouhan, G.
%T Pre-assessments of plant conservation status in islands : the case of French Overseas Territories
%D 2023
%L fdi:010087436
%G ENG
%J Biodiversity and Conservation
%@ 0960-3115
%K Red List ; Pre-assessments ; Islands ; Tracheophytes ; French overseas territories ; Endemics
%K RÉUNION ; MAYOTTE ; GUADELOUPE ; MARTINIQUE ; NOUVELLE CALÉDONIE ; TAAF ; AMSTERDAN ILE ; KERGUELEN ; CROZET, SAINT PAUL ILE ; EPARSES ILES
%M ISI:000922729900001
%P [23 ]
%R 10.1007/s10531-023-02544-8
%U https://www.documentation.ird.fr/hor/fdi:010087436
%> https://www.documentation.ird.fr/intranet/publi/2023-04/010087436.pdf
%V [Early access]
%W Horizon (IRD)
%X Assessment methods have been developed to estimate a preliminary conservation status for species and subsequently to facilitate the building of Red Lists. Such pre-assessment methods could be particularly useful in the French Overseas Territories (FOTs) where Red Lists tend to be out-dated or absent and where a high number of endemic species face detrimental anthropogenic pressures. We first aimed to conduct a preliminary assessment (hereafter, pre-assessment) of the conservation status of endemic plants from Guadeloupe, Martinique, Reunion, Mayotte, French sub-Antarctic islands, New Caledonia, and Scattered Islands. We then compared the various methods used in conducting the pre-assessment and discussed ways to adapt these methods to small territories. We compiled occurrence data of endemic species identified thanks to a previous taxonomic work and pre-assessed their conservation status under Red List criteria A and B and the use of a Random Forest algorithm. We then measured the accuracy, specificity, and sensitivity of each method based on existing Red Lists. The Random Forest algorithm and a method based on range-size performed best at correctly attributing conservation status. Using these pre-assessment methods, we estimated that up to 60% of the endemic flora of the FOTs is potentially threatened. Range restriction but also anthropogenic pressures were key factors that explained these risks. Pre-assessment methods are useful tools to get a first measure of species conservation status. These methods should be adapted to the territories considered and their conservation issues in order to reach a good performance.
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