Errata: Feeding Ecology and Niche Separation in Some Native and Domestic Ungulates on the shortgrass Prairie
Errata: Feeding Ecology and Niche Separation in Some Native and Domestic Ungulates on the shortgrass Prairie
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DOI：
10.2307/2402399
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发表时间：
1981-08
影响因子：
5.7
通讯作者：
C. C. Schwartz-C.;J. Ellis
中科院分区：
文献类型：
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作者：
C. C. Schwartz-C.;J. Ellis
(1)使用的饮食选择研究的结果和两个野生和两个国内的物种，我们比较了一些方面的生态关系到身体的大小，最近的进化历史的物种和目前的饲料条件。(2)食物生态位宽度和种间饮食重叠似乎依赖于最近的进化历史，以及在身体大小，但价值的强烈影响饲料的数量和质量。(3)饲料质量的季节性变化，饮食选择性似乎特别敏感，例如，大型以及小型动物追求相对选择性的策略时，饲料条件允许，但身体大小和相关的营养能量需求似乎设置的限制，从选择性到非选择性的战术发生的开关。(4)对饮食组成和质量的敏感性随着体型的减小而增加，但家养绵羊除外。这是可能的解剖生理适应，包括一个相对较大的瘤胃网允许国内绵羊利用更多的饲料植物物种和栖息在更广泛的各种生态位和生态系统比大多数有蹄类动物。尽管绵羊的体型相对较小，但人类的选择使它们成为食物和栖息地的多面手。
(1) Using the results of diet selection studies and two wild and two domestic species, we compare some aspects of ecology in relation to body size, the recent evolutionary history of the species and current forage conditions. (2) Food niche breadth and inter-species diet overlap seemed dependent upon recent evolutionary history as well as upon body size, but values were strongly influenced by forage quantity and quality. (3) Dietary selectivity appears especially sensitive to seasonal changes in forage quality, e.g. large as well as small animals pursued relatively selective strategies when forage conditions permitted, but body size and related nutritional-energetic demands appeared to set the limits where switches from selective to non-selective tactics took place. (4) Sensitivity to diet composition and quality increased with decreasing size except in the domestic sheep. It is likely that anatomical-physiological adaptations, including a relatively large rumeno-reticulum allow domestic sheep to utilize more forage plant species and inhabit a wider variety of niches and ecosystems than most ungulates. Human selection has made the sheep food and habitat generalists despite their relatively small size.