A quantitative classification of chorotypes for the Socotra Archipelago’s non-endemic plants

作者：Dario La Montagna, Giuliano Fanelli, Michele De Sanctis, Alessio Farcomeni, Petr Maděra, Luca Malatesta, Kay van Damme, Fabio Attorre · 发表于：Vegetation Classification and Survey · 年份：2026 · DOI：10.3897/vcs.176349 · 被引用次数：2 · 研究领域：Pharmacological Effects of Medicinal Plants、Botany, Ecology, and Taxonomy Studies、Ethnobotanical and Medicinal Plants Studies

Aims : To identify groups of species with similar geographic ranges in the non-endemic flora of the Socotra Archipelago, place them within a global biogeographic context, and examine how these chorotypes are reflected in Socotran vegetation types. Study area : The Socotra Archipelago (Yemen) and its surroundings, analysed against a 1° × 1° global grid to provide global context and a Socotra-centred regional focus. Methods : We assembled 4,493,566 GBIF records for 477 target taxa; 417 had usable occurrences and 389 met a ≥ 15-occurrence threshold for modelling. To obtain coarse-grained ranges, we fitted ensemble models and binarised predictions using conservative thresholds. Grid cells were grouped according to species turnover and geographic proximity using clustering methods, and statistical tests identified species associated with particular clusters. A second analysis focused on a Socotra-centred subset to resolve finer regional patterns. Species-level chorotypes were linked to synoptic vegetation tables to characterise vegetation types. Results : The global analysis identified ten spatially cohesive groups of species at the continent scale. The Socotra-centred analysis resolved finer regional structure. Socotra’s chorological spectrum is dominated by the Xeric Tropical-Subtropical chorotype (13.8%), with contributions from the Paleoarabian-Somali-Masai chorotype (10.1%) and Temperate-Subtropical Belt chorotype (9.2%). Vegetation types differed markedly in their chorologic...