Cutts Vanessa, Hanz Dagmar M, Barajas-Barbosa Martha Paola, Schrodt Franziska, Steinbauer Manuel J, Beierkuhnlein Carl, Denelle Pierre, Fernández-Palacios José María, Gaüzère Pierre, Grenié Matthias, Irl Severin D H, Kraft Nathan, Kreft Holger, Maitner Brian, Munoz François, Thuiller Wilfried, Violle Cyrille, Weigelt Patrick, Field Richard, Algar Adam C
School of Geography, University of Nottingham, Nottingham, UK.
Conservation Science Group, Department of Zoology, University of Cambridge, Cambridge, UK.
Ecol Lett. 2023 Apr;26(4):504-515. doi: 10.1111/ele.14169. Epub 2023 Feb 5.
Current models of island biogeography treat endemic and non-endemic species as if they were functionally equivalent, focussing primarily on species richness. Thus, the functional composition of island biotas in relation to island biogeographical variables remains largely unknown. Using plant trait data (plant height, leaf area and flower length) for 895 native species in the Canary Islands, we related functional trait distinctiveness and climate rarity for endemic and non-endemic species and island ages. Endemics showed a link to climatically rare conditions that is consistent with island geological change through time. However, functional trait distinctiveness did not differ between endemics and non-endemics and remained constant with island age. Thus, there is no obvious link between trait distinctiveness and occupancy of rare climates, at least for the traits measured here, suggesting that treating endemic and non-endemic species as functionally equivalent in island biogeography is not fundamentally wrong.
当前的岛屿生物地理学模型将特有物种和非特有物种视为功能上等同，主要关注物种丰富度。因此，岛屿生物群落的功能组成与岛屿生物地理变量之间的关系在很大程度上仍然未知。利用加那利群岛895种本土植物的性状数据（株高、叶面积和花长），我们将特有物种和非特有物种的功能性状独特性及气候稀有性与岛屿年龄联系起来。特有物种与气候稀有条件存在关联，这与岛屿随时间的地质变化相一致。然而，特有物种和非特有物种之间的功能性状独特性并无差异，且随岛屿年龄保持不变。因此，至少对于此处测量的性状而言，性状独特性与稀有气候的占据之间没有明显联系，这表明在岛屿生物地理学中将特有物种和非特有物种视为功能上等同从根本上来说并非错误。
