Movement rules determine nomadic species' responses to resource supplementation and degradation
Movement rules determine nomadic species' responses to resource supplementation and degradation
复制标题
运动规则决定了游牧物种对资源补充和退化的反应
DOI：
10.1111/1365-2656.13318
复制
发表时间：
2020
影响因子：
4.8
通讯作者：
Börger, ed., Luca
中科院分区：
文献类型：
--
作者：
Teitelbaum, Claire S.;Altizer, Sonia;Hall, Richard J.;Börger, ed., Luca
在不可预测的环境中，许多动物是游牧的，以每年不同的不规则模式移动。探索游牧运动的机制是需要了解动物如何生存在高度可变的环境中，并预测行为和人口对环境变化的反应，我们开发了一个网络模型，以确定合理的游牧动物运动的机制，通过比较多个运动规则的性能沿着从游牧到居住的连续体。利用模拟和分析结果，我们探讨了不同类型的栖息地改造（增加或减少资源可用性）可能会影响遵循这些规则的动物的丰度和运动速率。在大多数情况下，离开斑块取决于资源可用性和/或竞争的运动规则几乎同样好，并且比居住或不知情的运动更好，即使使用每种规则的动物移动的速度基本上不同。栖息地的修改，稳定的资源，无论是通过资源补充或退化，侵蚀了知情的游牧运动的好处，特别是运动的基础上的资源availability already.These结果表明，简单的运动规则可以解释游牧动物的运动，并确定物种对环境变化的反应。特别是，景观稳定和补充可能是促进留居动物种群的有用战略，但对管理高度移动的物种则不太有利，其中许多物种受到生境破坏和气候变化的威胁。
In environments that vary unpredictably, many animals are nomadic, moving in an irregular pattern that differs from year to year. Exploring the mechanisms of nomadic movement is needed to understand how animals survive in highly variable environments, and to predict behavioural and population responses to environmental change.We developed a network model to identify plausible mechanisms of nomadic animal movement by comparing the performance of multiple movement rules along a continuum from nomadism to residency. Using simulations and analytical results, we explored how different types of habitat modifications (that augment or decrease resource availability) might affect the abundance and movement rates of animals following each of these rules.Movement rules for which departure from patches depended on resource availability and/or competition performed almost equally well and better than residency or uninformed movement under most conditions, even though animals using each rule moved at substantially different rates. Habitat modifications that stabilized resources, either by resource supplementation or degradation, eroded the benefits of informed nomadic movements, particularly for movements based on resource availability alone.These results suggest that simple movement rules can explain nomadic animal movements and determine species’ responses to environmental change. In particular, landscape stabilization and supplementation might be useful strategies for promoting populations of resident animals, but would be less beneficial for managing highly mobile species, many of which are threatened by habitat disruption and changes in climate.