Predicting oscillatory dynamics in the movement of territorial animals
Predicting oscillatory dynamics in the movement of territorial animals
复制标题
DOI：
10.1098/rsif.2011.0797
复制
发表时间：
2012-07-07
影响因子：
3.9
通讯作者：
Harris, S.
中科院分区：
文献类型：
--
作者：
Giuggioli, L.;Potts, J. R.;Harris, S.
了解生态过程依赖于对每个单独组成部分的动态的了解。在动物种群生态学的背景下，动物的移动和相互作用方式对于解释各种观察到的模式至关重要。在这里，我们对相互作用的气味标记动物的运动动力学进行了理论研究。我们研究领地动物的运动统计数据如何导致动物均方位移（MSD）出现阻尼振荡。这种非单调性取决于一个无量纲参数，该参数由连续步骤之间的相关距离与区域大小的比率给出。随着该参数的增加，动物 MSD 的时间依赖性显示出从单调（布朗行走的特征）到非单调（高度相关行走的特征）的转变。这里提出的结果代表了一种确定有限区域内动物运动过程持续程度的新方法。
Understanding ecological processes relies upon the knowledge of the dynamics of each individual component. In the context of animal population ecology, the way animals move and interact is of fundamental importance in explaining a variety of observed patterns. Here, we present a theoretical investigation on the movement dynamics of interacting scent-marking animals. We study how the movement statistics of territorial animals is responsible for the appearance of damped oscillations in the mean square displacement (MSD) of the animals. This non-monotonicity is shown to depend on one dimensionless parameter, given by the ratio of the correlation distance between successive steps to the size of the territory. As that parameter increases, the time dependence of the animal's MSD displays a transition from monotonic, characteristic of Brownian walks, to non-monotonic, characteristic of highly correlated walks. The results presented here represent a novel way of determining the degree of persistence in animal movement processes within confined regions.