Genus Colocasiomyia (Drosophilidae: Diptera) in Sabah, Bornean Malaysia: High species diversity and use of host aroid inflorescences
Genus Colocasiomyia (Drosophilidae: Diptera) in Sabah, Bornean Malaysia: High species diversity and use of host aroid inflorescences
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DOI：
10.1111/j.1479-8298.2011.00452.x
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发表时间：
2011-07
影响因子：
0.9
通讯作者：
M. Toda;M. Lakim
中科院分区：
文献类型：
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作者：
M. Toda;M. Lakim
根据从 14 或 15 个天南星科物种的花序中收集的样本，从马来西亚沙巴（神山及邻近地区）报告了总共 21 个 Colocasiomyia 物种，包括 17 个未描述的物种。作为该属的当地动物群，这一物种数量是世界上最多的。高度的物种多样性归因于属于 Colocasiomyia baechlii 物种组的 12 种未描述的物种。 Colocasiomyia 的一个特殊繁殖习性是两个物种共享相同的花序，它们之间有部分生态位分离：一个物种专门使用花序花序的雌花（下部雌花）部分进行产卵和幼虫发育，而另一个物种则主要使用雄花序（上部雄花）部分。然而，baechlii 组物种表现出截然不同的寄主植物利用模式：许多（最多八个）物种在同一花序上共生。它们不太可能在花序内以微异域方式分隔它们的繁殖生态位。相反，不同地点、不同季节、不同寄主植物的物种组成及其所占的个体数比例有所不同，并且存在部分重叠。这种局部分布、物候和寄主选择的部分分离将有助于它们的共存并促进该类群的物种多样性。
A total of 21 Colocasiomyia species, including 17 undescribed species, are reported from Sabah (Mt. Kinabalu and neighboring areas), Malaysia, based on samples collected from inflorescences of 14 or 15 Araceae species. This number of species is the largest as a local fauna of this genus in the world. The high species diversity is attributed to 12 undescribed species belonging to the Colocasiomyia baechlii species group. A particular breeding habit of Colocasiomyia is sharing of the same inflorescence by a pair of species, with partial niche separation between them: one species uses exclusively the pistillate (lower female‐flower) section of the spadix for oviposition and larval development, whereas the other mostly uses the staminate (upper male‐flower) section. However, the baechlii group species show quite different patterns of host plant use: many (up to eight) species cohabit on the same inflorescence. It is unlikely that they separate their breeding niches micro‐allopatrically within an inflorescence. Instead, species composition and their proportions of individual numbers vary among different localities, seasons and host plants, with partial overlap among them. Such partial separations in local distribution, phenology and host selection would in combination contribute to their coexistence and promote the species diversity of this group.