Spatial distribution of lion kills determined by the water dependency of prey species
Spatial distribution of lion kills determined by the water dependency of prey species
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DOI：
10.1644/09-mamm-a-392.1
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发表时间：
2010-10-01
影响因子：
1.7
通讯作者：
Prins, Herbert H. T.
中科院分区：
文献类型：
--
作者：
de Boer, Willem F.;Vis, Marc J. P.;Prins, Herbert H. T.
狮子(Panthera Leo)的捕食风险与栖息地特征、可获得性和猎物特征有关。我们通过分析狮子猎杀的地点与植被密集的河流和低植被密度的人工水点之间的关系，区分了植被密度和饮用水的存在对狮子死亡的影响。对南非Klaserie私人自然保护区的狮子捕杀的空间分布进行了研究。用广义线性模型分析了215头狮子猎杀与最近水源之间的距离。狮子选择中等体型的猎物物种。由于猎物的随机分布，狮子的死亡比预期的更接近河流和人工供水点。吸引猎物的水，而不是河流地区的植被密度，增加了捕食风险，水牛(Syncerus Caffer)、角马(Traelphus Strepsiceros)和角马(Connochaetes Taounus)是依赖水的猎物物种。猎物种类的特征，包括摄食类型(食物习性)、消化类型(反刍动物或非反刍动物)或身体大小，不能解释狮子被杀的地点，狮子被杀的季节模式也不明显。我们认为，狮子对当地哺乳动物群落的级联影响在空间上是不同的。DOI：10.1644/09-MAMM-A-392.1
Predation risk from lions (Panthera leo) has been linked to habitat characteristics and availability and traits of prey. We separated the effects of vegetation density and the presence of drinking water by analyzing locations of lion kills in relation to rivers with dense vegetation, which offer good lion stalking opportunities, and artificial water points with low vegetation density. The spatial distribution of lion kills was studied at the Klaserie Private Nature Reserve, South Africa. The distance between 215 lion kills and the nearest water source was analyzed using generalized linear models. Lions selected medium-sized prey species. Lion kills were closer to rivers and to artificial water points than expected by random distribution of the kills. Water that attracted prey, and not the vegetation density in riverine areas, increased predation risk, with kills of buffalo (Syncerus caffer), kudu (Tragelaphus strepsiceros), and wildebeest (Connochaetes taurinus) as water-dependent prey species. Traits of prey species, including feeding type (food habits), digestion type (ruminant or nonruminant), or body size, did not explain locations of lion kills, and no seasonal patterns in lion kills were apparent. We argue that the cascading impact of lions on local mammal assemblages is spatially heterogeneous. DOI: 10.1644/09-MAMM-A-392.1.