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首页> 外文期刊>South African Journal of Wildlife Research >Fynbos fires may contribute to the maintenance of high genetic diversity in orange-breasted sunbirds (Anthobaphes violacea)
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Fynbos fires may contribute to the maintenance of high genetic diversity in orange-breasted sunbirds (Anthobaphes violacea)

机译：Fynbos大火可能有助于维持橙胸太阳鸟（Anthobaphes violacea）的高度遗传多样性

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摘要

The maintenance of genetic diversity in populations is one of the key concerns in wildlife management. Levels of genetic diversity are partly determined by the evolutionary history of a population and partly by environmental factors which affect population size, gene flow and mating systems. In this study, we used microsatellite DNA markers to assess the level of genetic diversity in a population of orange-breasted sunbirds (Anthobaphes violacea), an endemic nectarivore in the fynbos biome at Jonkershoek Nature Reserve, South Africa. We found high levels of genetic diversity in this population, with an average of 19 alleles per locus, and both expected and observed heterozygosities of 0.84. The level of genetic diversity found in this species is comparable to that of Cape sugarbirds (Promerops cafer), a fellow fynbos endemic, but higher than that reported for other species of nectarivorous birds not affected by frequent habitat fires. We suggest that the destruction of flowering plants by fires, forcing birds to disperse, may have contributed to the maintenance of high levels of genetic diversity through encouraging outbreeding in orange-breasted sunbirds and Cape sugarbirds. We also discuss the implications of our findings for management of these species.
机译：维持种群遗传多样性是野生动植物管理的主要关注之一。遗传多样性的水平部分取决于人口的进化历史，部分取决于影响人口规模，基因流和交配系统的环境因素。在这项研究中，我们使用微卫星DNA标记来评估橙胸太阳鸟（Anthobaphes violacea）种群的遗传多样性水平，该鸟是南非Jonkershoek自然保护区fynbos生物群落中的一种地方性油桃。我们在该人群中发现了高水平的遗传多样性，平均每个位点有19个等位基因，预期和观察到的杂合度均为0.84。在该物种中发现的遗传多样性水平与费恩博斯地方性流行的开普糖鸟（Promerops cafer）相当，但高于其他不受频繁栖息地火灾影响的食肉鸟类物种的报告水平。我们认为，大火毁坏开花植物，迫使鸟类散播，可能是通过鼓励橙胸太阳鸟和开普糖鸟的近亲繁殖来维持高水平的遗传多样性。我们还将讨论我们的发现对这些物种管理的意义。

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