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首页> 外文期刊>Canadian Journal of Zoology >Moose browsing and forage availability: a scale-dependent relationship?
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Moose browsing and forage availability: a scale-dependent relationship?

机译：驼鹿浏览和草料可用性：取决于规模的关系？

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摘要

Scale dependence is a fundamentally important topic in ecology because it determines whether results can be generalized over different spatial scales. We studied the relationship between forage consumption by moose (iAlces alces (L., 1758)) and forage availability across six nested spatial scales in south-central Sweden. By using multiple regression, we concluded that the amount of available forage was the best single variable explaining absolute consumption, irrespectively of scale. Forage species diversity, site productivity, and moose density were also important for predicting forage consumption, but their effects differed across the different spatial scales. A multiple regression including forage availability, moose density, site productivity, and forage diversity explained between 31% and 49% of the variation in forage consumption. The importance of a moose index as an explanatory variable decreased with increasing spatial scale, whereas the importance of site productivity increased.
机译：尺度依赖性是生态学中一个根本上重要的主题，因为它决定了结果是否可以在不同的空间尺度上得到概括。我们研究了驼鹿的牧草消耗量（iAlces alces（L.，1758））与瑞典中南部六个嵌套空间尺度上的牧草可用性之间的关系。通过多元回归，我们得出结论，无论规模如何，可用饲料的量都是解释绝对消耗的最佳单变量。饲草种类的多样性，产地生产力和驼鹿密度对于预测饲草消耗也很重要，但其影响在不同的空间尺度上是不同的。包括草料可利用性，驼鹿密度，产地生产力和草料多样性在内的多元回归解释了草料消耗变化的31％至49％。驼鹿指数作为解释变量的重要性随着空间规模的增加而降低，而站点生产力的重要性则增加。

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