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首页> 外文期刊>Global Ecology and Conservation >Original Research Article Stable isotope niche segregation between rare topi antelope ( Damaliscus lunatus korrigum ) and other sympatric bulk grazers in Pendjari Biosphere Reserve (Northern Benin): Implication for topi conservation
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Original Research Article Stable isotope niche segregation between rare topi antelope ( Damaliscus lunatus korrigum ) and other sympatric bulk grazers in Pendjari Biosphere Reserve (Northern Benin): Implication for topi conservation

机译：原创研究文章稳定的同位素稀土羚羊（Damaliscus Lunatus Korrigum）与Pendjari生物圈储备的其他SympaTric散装格列勒斯（北贝宁）：对Topi Presentation的影响

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Understanding factors limiting rare species is a major concern in conservation ecology. Little is known about how large mammalian bovid species from West Africa partition diet resources, and to what extent the rare topi antelope and other sympatric bulk grazers can cope with this co-existing system. Using tooth collagen stable isotope data, we studied an assemblage of three sympatric grazers (topi, hartebeest and roan) with different population density. Our findings showed numerous patterns in resource partitioning amongst the three sympatric species studied, suggesting that the species used dietary resources in contrasting ways. There were significant differences in both δsup13/supC and δsup15/supN signatures among topi, hartebeest and roan. A very narrow range could be noticed for the rare topi antelope (?6.05‰ to ?7.63‰) for δsup13/supC values and no significant differences at individual scale. The more abundant species such as hartebeest and roan were found to use a high proportion of the isotopic niche space of topi (more than 70%), while topi used only a narrow range of hartebeest and roan niche space (less than 10%). Our study provides the first evidence for the resource partitioning amongst high and low density ungulates in West African savanna. Expansion of the niche noted in the roan and hartebeest is much more related to the strong variation of the niche at the individual level. Topi, as subordinate species narrow their niche instead of expanding the dietary niche as expected. Our findings regarding the absence of dietary niche flexibility observed in the topi despite it being considered as subordinate species were discussed in being one of the factor limiting its population recovery in West African grazer assemblages.
机译：了解限制稀有物种的因素是保护生态学的主要问题。关于来自西非分区饮食资源的大型哺乳动物牛肉种类，以及罕见的Topi羚羊和其他SympaTric散装格拉泽可以应对这一共同现有系统的程度。使用牙齿胶原蛋白稳定的同位素数据，我们研究了具有不同人口密度的三个SympaTric Grazers（TOPI，HARTEEST和ROAN）的组装。我们的研究结果表明，在研究的三种合并物种中，众多资源分区模式，表明物种以对比的方式使用饮食资源。 δ 13℃和δ 15在Topi，Hartebesest和Roan中的δ 15次差异存在显着差异。对于罕见的TOPI羚羊（α.6.05‰至α.7.63μ），可以注意到非常窄的范围，用于δ 13/13> c值，并且单个规模没有显着差异。发现哈特贝斯特和罗南等诸如较高的物种使用高比例的TOPI的同位素Niche空间（超过70％），而TOPI仅使用窄范围的HARTEEST和ROAN利基空间（小于10％）。我们的研究提供了在西非大草原的高密度Unoculates中的资源分区的第一个证据。在罗南和哈特贝中指出的利基扩张与个体层面的利基的强大变异更大。顶部，作为下属物种缩小他们的利基，而不是按预期扩展膳食利基。我们认为在TOPI中观察到缺乏膳食利基灵活性的发现，尽管它被视为下属物种，是限制其在西非格拉塞尔集会中的人口回收的因素之一。

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