Assembling a species–area curve through colonization, speciation and human-mediated introduction

Aim: The fundamental biogeographical processes of colonization, speciation and extinction shape island biotas in space–time. On oceanic islands, area and isolation affect these processes and resulting biodiversity patterns. In the Anthropocene, a new human-mediated colonization dynamic is altering insular ecosystems world-wide. Here, we test predictions about the roles of archipelago area and isolation in structuring ant diversity patterns through effects on both natural and anthropogenic biogeographical processes. Location: Tropical Pacific islands. Methods: We compiled a comprehensive data set of ant faunal compositions across tropical Pacific archipelagos. Using regression analysis we evaluated the bivariate and interactive effects of area and isolation on the number of colonizing lineages, native species, endemic species, exotic species and total richness in the archipelago. Results: There is a strong species–area effect and a much more modest isolation effect on total ant specie...

目标：殖民化、物种形成与灭绝等基础生物地理过程在时空尺度上塑造着岛屿生物群。在海洋岛屿中，面积与隔离度影响着这些过程及由此产生的生物多样性模式。在人类世（Anthropocene），一种由人类介导的新型殖民化动态正在全球范围内改变岛屿生态系统。本研究旨在检验关于群岛面积与隔离度通过影响自然及人为生物地理过程来构建蚂蚁多样性模式的预测。
地点：热带太平洋岛屿。
方法：我们汇编了热带太平洋群岛蚂蚁区系组成的综合数据集。通过回归分析，我们评估了面积与隔离度对群岛中殖民谱系数量、本地物种、特有物种、外来物种及总丰富度的双变量效应与交互效应。
结果：群岛总面积对蚂蚁物种总数存在显著的种-面积效应，而隔离度的影响则相对微弱……