{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T12:18:43Z","timestamp":1778674723985,"version":"3.51.4"},"posted":{"date-parts":[[2023,10,21]]},"reference-count":0,"publisher":"Wiley","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>\n                  Although species radiations on island archipelagos are broadly studied,\nthe geographic and ecological modes of speciation that underlie\ndiversification are often not fully understood. Both allopatry and\nsympatry play a role during radiations, particularly on islands with\nprofound habitat diversity. Here, we use the most diverse Canary Island\nplant radiation,\n                  <jats:italic toggle=\"yes\">Aeonium<\/jats:italic>\n                  (Crassulaceae), to phylogenetically test\ntwo hypotheses: (1) allopatric speciation, which predicts that closely\nrelated taxa are ecologically similar but do not co-occur, and (2)\nsympatric speciation, whereby closely related taxa co-occur\ngeographically but are ecologically distinct. We fitted niche and\nspatial distribution models based on extensive field surveys to quantify\ngeographic and ecological divergence among taxa integrated in a\nphylogenetic context. While allopatry seems to be the main driver in\nspeciation among islands, within-island speciation occurs in sympatry.\nContrary to our expectation, phylogenetically closely related species\ntend to occupy similar ecological niches, suggesting that ecological\nniche divergence among species accumulates slowly, even in sympatry.\nThis suggests that evolutionary young taxa, may be partially\nreproductively isolated due to subtle phenotypic differences, such as\nreproductive morphology and phenology rather than by ecology and may\nputatively exacerbate divergence among populations. Thus, allopatry and\nsympatry are complementary speciation mechanisms on oceanic islands,\njointly spurring this enigmatic radiation.\n                <\/jats:p>","DOI":"10.22541\/au.169787184.44816715\/v1","type":"posted-content","created":{"date-parts":[[2023,10,21]],"date-time":"2023-10-21T03:04:23Z","timestamp":1697857463000},"source":"Crossref","is-referenced-by-count":0,"title":["Allopatric and sympatric drivers on the diversification dynamics of Aeonium (Crassulaceae) from the Canary Islands"],"prefix":"10.22541","author":[{"given":"Patr\u00edcia dos","family":"Santos","sequence":"first","affiliation":[{"name":"Universidade de Lisboa Faculdade de Ci\u00eancias"}]},{"given":"M. Alexandra","family":"Oliveira","sequence":"additional","affiliation":[{"name":"Universidade de Lisboa Faculdade de Ci\u00eancias"}]},{"given":"Dirk","family":"Karger","sequence":"additional","affiliation":[{"name":"Swiss Federal Institute for Forest Snow and Landscape Research WSL"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2253-2556","authenticated-orcid":false,"given":"Kay","family":"Lucek","sequence":"additional","affiliation":[{"name":"University of Neuch\u00e2tel"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8294-7924","authenticated-orcid":false,"given":"Cristina","family":"Branquinho","sequence":"additional","affiliation":[{"name":"Universidade de Lisboa Faculdade de Ci\u00eancias"}]},{"given":"Juriaan de","family":"Vos","sequence":"additional","affiliation":[{"name":"Universit\u00e4t Basel"}]}],"member":"311","container-title":[],"original-title":[],"link":[{"URL":"https:\/\/www.authorea.com\/doi\/full\/10.22541\/au.169787184.44816715\/v1","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,13]],"date-time":"2026-05-13T11:46:59Z","timestamp":1778672819000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.authorea.com\/doi\/full\/10.22541\/au.169787184.44816715\/v1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,10,21]]},"references-count":0,"URL":"https:\/\/doi.org\/10.22541\/au.169787184.44816715\/v1","relation":{},"subject":[],"published":{"date-parts":[[2023,10,21]]},"subtype":"preprint"}}