探索一种新热带小型哺乳动物大小尺度运动之间的相互作用。

IF 3.4 1区 生物学 Q2 ECOLOGY Movement Ecology Pub Date : 2024-03-25 DOI:10.1186/s40462-024-00465-x
E Brigatti, B Ríos-Uzeda, M V Vieira
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引用次数: 0

摘要

我们记录并分析了有袋类动物Didelphis aurita在不同时间尺度上的运动模式。我们利用卷线技术每天收集有袋类动物的运动轨迹,并在无线电跟踪装置的帮助下,每隔几周估算一次有袋类动物的运动距离。小规模的运动可以用截断的莱维飞行来很好地描述,而大规模运动产生的距离分布则与布朗运动相符。根据小规模数据校准的截断莱维飞行建立的动物运动行为模型,在短时间间隔(约 1 周)后趋近于布朗运动行为。这些结果表明,莱维飞行行为还是布朗运动行为取决于动物路径的聚集规模。在这种特殊情况下,由于每日数据中存在的粗略截断效应会导致布朗运动行为的快速收敛,因此莱维飞行对于描述这些动物的局部分散特性就不那么重要了,其结果很好地近似于一个正常的扩散过程,而不是一个快速的反常扩散过程。有趣的是,我们能够将两个运动阶段描述为聚集产生的统计效应的结果,而无需引入生态约束或在不同时空尺度上运行的机制。这一结果具有普遍意义,因为它可以成为描述不同类群和各种系统中不同时空尺度运动现象的关键因素。
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Exploring the interplay between small and large scales movements in a neotropical small mammal.

We record and analyze the movement patterns of the marsupial Didelphis aurita at different temporal scales. Animals trajectories are collected at a daily scale by using spool-and-line techniques and, with the help of radio-tracking devices, animals traveled distances are estimated at intervals of weeks. Small-scale movements are well described by truncated Lévy flight, while large-scale movements produce a distribution of distances which is compatible with a Brownian motion. A model of the movement behavior of these animals, based on a truncated Lévy flight calibrated on the small scale data, converges towards a Brownian behavior after a short time interval of the order of 1 week. These results show that whether Lévy flight or Brownian motion behaviors apply, will depend on the scale of aggregation of the animals paths. In this specific case, as the effect of the rude truncation present in the daily data generates a fast convergence towards Brownian behaviors, Lévy flights become of scarce interest for describing the local dispersion properties of these animals, which result well approximated by a normal diffusion process and not a fast, anomalous one. Interestingly, we are able to describe two movement phases as the consequence of a statistical effect generated by aggregation, without the necessity of introducing ecological constraints or mechanisms operating at different spatio-temporal scales. This result is of general interest, as it can be a key element for describing movement phenomenology at distinct spatio-temporal scales across different taxa and in a variety of systems.

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来源期刊
Movement Ecology
Movement Ecology Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
6.60
自引率
4.90%
发文量
47
审稿时长
23 weeks
期刊介绍: Movement Ecology is an open-access interdisciplinary journal publishing novel insights from empirical and theoretical approaches into the ecology of movement of the whole organism - either animals, plants or microorganisms - as the central theme. We welcome manuscripts on any taxa and any movement phenomena (e.g. foraging, dispersal and seasonal migration) addressing important research questions on the patterns, mechanisms, causes and consequences of organismal movement. Manuscripts will be rigorously peer-reviewed to ensure novelty and high quality.
期刊最新文献
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