Ecology of a typical West African Sudanian savannah rodent community
Ecology of a typical West African Sudanian savannah rodent community
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DOI：
10.1111/aje.12055
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发表时间：
2013-09-01
影响因子：
1
通讯作者：
Granjon, Laurent
中科院分区：
文献类型：
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作者：
Ba, Khalilou;Kane, Mamadou;Granjon, Laurent
本文在雨季开始（7月）和结束（11月）对塞内加尔东南部典型苏丹草原地区的小型哺乳动物群落进行了密集抽样研究。在5931个陷阱夜和200个陷阱夜共捕获小型哺乳动物767只，其中啮齿类动物12种757只，此外还捕获了一些鼩鼱和刺猬。积累曲线显示鼠群取样充分。鼠类啮齿动物数量远多于沙鼠，其中红leucus为优势种，在各生境均有较高的捕获数量。Arvicanthis niloticus和Praomys daltoni也很丰富，其次是Mastomys natalensis和Gerbilliscus guineae。丰度在雨季开始时较高，此时所有物种的繁殖活动较低。雨季结束时，鼠类啮齿类动物繁殖活跃，沙鼠鼠密度最低。在不同时期，一些物种的栖息地（包括人类居住地）的相对丰度发生了显著变化，这表明栖息地偏好的季节性趋势。这可能有助于物种在这个物种丰富的啮齿动物群落中共存，在未来的几年里，这个地区可能会发生重大的栖息地改变。
The small-mammal community of a typical Sudanian savannah area of south-eastern Senegal was studied by way of intensive sampling at the beginning (July) and at the end (November) of the rainy season. A total of 5931 trapnights and 200 pitfallnights yielded 767 small mammals, including 757 rodents of 12 species, as well as a few shrews and hedgehogs. Accumulation curve indicated that the rodent community was well sampled. Murine rodents were far more numerous than gerbilline rodents, and among them, Mastomys erythroleucus was the dominant species, being caught in high numbers in all habitats. Arvicanthis niloticus and Praomys daltoni were also abundant, followed by Mastomys natalensis and Gerbilliscus guineae. Abundances were high at the beginning of the rainy season when reproductive activity was low in all species. At the end of the rainy season, murine rodents were actively involved in reproduction, while gerbilline rodents were at their lowest density. Significant changes in relative abundance among habitats (including human dwellings) were observed between periods in some species, suggesting seasonal trends in habitat preferences. This may help species coexistence in this species-rich rodent community, in an area likely to be submitted to significant habitat alterations in the years to come.