The role of immigration and in-situ radiation in explaining blood parasite assemblages in an island bird clade
The role of immigration and in-situ radiation in explaining blood parasite assemblages in an island bird clade
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DOI：
10.1111/j.1365-294x.2012.05483.x
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发表时间：
2012-03-01
影响因子：
4.9
通讯作者：
Heeb, Philipp
中科院分区：
文献类型：
--
作者：
Cornuault, Josselin;Bataillard, Anais;Heeb, Philipp
岛屿上的寄生虫群落是通过多次迁徙和/或原位多样化而形成的。在这项研究中，我们使用系统发育方法来研究这些过程在塑造白细胞虫（一组感染白眼睛的血孢子虫）当前多样性模式中的作用，白眼睛虫是mascarerene群岛（西南印度洋）特有的一种血孢子虫血液寄生虫。我们发现，这种寄生虫群落是通过多次移民和原位多样化的结合而产生的，强调了这两个过程在解释岛屿多样性方面的重要性。具体来说，两个高度多样化的寄生虫分支似乎在其进化史的大部分时间里都存在于马斯卡林群岛，并在群岛内多样化，而另一个谱系显然是最近移民的，可能是人类引入的鸟类。有趣的是，一个寄生虫分支和印度洋Zosterops的进化史似乎与系统发育一致性的一个重要信号密切相关，这表明宿主-寄生虫共分化可能发生在这个系统中。
Parasite communities on islands are assembled through multiple immigrations and/or in-situ diversification. In this study, we used a phylogenetic approach to investigate the role of such processes in shaping current patterns of diversity in Leucocytozoon, a group of haemosporidian blood parasites infecting whites eyes (Zosterops) endemic to the Mascarene archipelago (south-western Indian Ocean). We found that this parasite community arose through a combination of multiple immigrations and in-situ diversification, highlighting the importance of both processes in explaining island diversity. Specifically, two highly diverse parasite clades appear to have been present in the Mascarenes for most of their evolutionary history and have diversified within the archipelago, while another lineage apparently immigrated more recently, probably with human-introduced birds. Interestingly, the evolutionary histories of one clade of parasites and Indian Ocean Zosterops seem tightly associated with a significant signal for phylogenetic congruence, suggesting that hostparasite co-divergence may have occurred in this system.