Lizards of the lost arcs: mid-Cenozoic diversification, persistence and ecological marginalization in the West Pacific
Lizards of the lost arcs: mid-Cenozoic diversification, persistence and ecological marginalization in the West Pacific
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DOI：
10.1098/rspb.2017.1760
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发表时间：
2018-01
期刊：
影响因子：
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通讯作者：
P. Oliver;Rafe M. Brown;F. Kraus;E. Rittmeyer;S. L. Travers;Cameron D. Siler
中科院分区：
文献类型：
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作者：
P. Oliver;Rafe M. Brown;F. Kraus;E. Rittmeyer;S. L. Travers;Cameron D. Siler
具有复杂地质历史的地区往往拥有多样化和高度地方性的生物群，但推断形成这种关系的生态和历史过程仍然具有挑战性。这里，在岛屿群落集合的分类群周期模型的背景下，我们调查了一种新表征的脊椎动物辐射的谱系多样性和栖息地利用模式，该辐射集中在世界上地质最复杂的岛屿区域：从菲律宾到斐济的岛弧。在岛弧上，分类群在生态上分布广泛，并提供证据支持对分类群周期的一项关键预测，特别是内部生境(低地雨林、山地生境)是比外围生境(沿海和疏林)更多的古老或遗留谱系的家园。然而，在大陆边缘，该分支显示出远离低地雨林的间断分布，出现在沿海、开阔或山地生境中。这些结果与生物相互作用在形成分离分布(分类单元周期的中心承租者)中的作用是一致的，但我们发现这种模式在大陆边缘最强烈，而不是岛屿。我们的结果还表明，岛屿上的外围生境，特别是岛弧，可能对持久性和多样性很重要，而不仅仅是分散和殖民。最后，自渐新世以来，今天华莱士线以东的水下岛屿群岛(以及相关的生物群)的新的系统发育证据对于理解整个亚洲和澳大利亚的长期生物交换和组装具有重要的意义。
Regions with complex geological histories often have diverse and highly endemic biotas, yet inferring the ecological and historical processes shaping this relationship remains challenging. Here, in the context of the taxon cycle model of insular community assembly, we investigate patterns of lineage diversity and habitat usage in a newly characterized vertebrate radiation centred upon the world's most geologically complex insular region: island arcs spanning from the Philippines to Fiji. On island arcs taxa are ecologically widespread, and provide evidence to support one key prediction of the taxon cycle, specifically that interior habitats (lowland rainforests, montane habitats) are home to a greater number of older or relictual lineages than are peripheral habitats (coastal and open forests). On continental fringes, however, the clade shows a disjunct distribution away from lowland rainforest, occurring in coastal, open or montane habitats. These results are consistent with a role for biotic interactions in shaping disjunct distributions (a central tenant of the taxon cycle), but we find this pattern most strongly on continental fringes not islands. Our results also suggest that peripheral habitats on islands, and especially island arcs, may be important for persistence and diversification, not just dispersal and colonization. Finally, new phylogenetic evidence for subaerial island archipelagos (with an associated biota) east of present-day Wallace's Line since the Oligocene has important implications for understanding long-term biotic interchange and assembly across Asia and Australia.