掠食者-猎物空间使用和景观特征影响大型哺乳动物社区的运动行为
Sarah B Bassing1, Lauren Satterfield1, Taylor R Ganz1
1School of Environmental and Forest Sciences, University of Washington, Seattle, Washington, USA.
Ecology
|October 15, 2024
概括
捕食者狩猎策略并没有改变猎物的移动,但捕食者和猎物的移动根据息地和长期风险进行调整,而不是特定的狩猎策略. 这影响了复杂生态系统中的遭遇率.
科学领域:
- 生态生态学 生态生态学
- 野生动物行为 野生动物行为
- 运动生态学 运动生态学
背景情况:
- 捕食者狩猎策略 (跟踪与追逐) 假定会影响猎物的反捕食者行为和捕食者运动.
- 很少有研究研究了这些策略如何影响多捕食者,多猎物系统中的自由活动动物.
研究的目的:
- 测试捕食者狩猎策略 (美洲狮的跟踪,狼的冲刺) 是否影响它们的大规模运动行为.
- 评估猎物 (无动物) 是否会因不同的捕食者狩猎策略而改变运动.
- 评估捕食者和猎物如何根据对方的息地选择和捕食风险调整运动.
主要方法:
- 利用隐藏的马尔科夫模型 (HMM) 与美国华盛顿东部400多只毛动物和大型捕食者的GPS跟踪数据.
- 分析了与息地选择和景观特征相关的广泛移动模式.
- 对比了美洲狮 (跟踪) 和狼 (冲刺) 的运动行为及其对类动物运动的影响.
主要成果:
- 捕食者和类动物根据长期息地选择模式调整了大规模的移动,而不是特定的捕食者狩猎策略.
- 捕食者根据猎物的类型改变了运动;类动物在大型捕食者地区的运动减少,无论狩猎策略如何.
- 捕食者和猎物的运动都受到景观特征的影响,但不仅仅是通过促进特定狩猎行为的息地.
结论:
- 捕食者和猎物根据长期风险和资源分配在广泛的时间尺度上调整运动,从而影响遭遇率.
- 息地特征在复杂的多捕食者,多猎物系统中塑造运动行为中发挥着重要作用.
- 运动调整似乎是由一般风险和资源可用性驱动的,而不是特定的捕食者狩猎策略.
相关概念视频
Predator-Prey Interactions
16.1K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
16.1K
What are Populations and Communities?
33.8K
Overview
33.8K
Habitat Fragmentation
17.4K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.4K
Keystone Species
21.6K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
21.6K
Distribution and Dispersion
21.6K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
21.6K
Ecological Niches
23.6K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
23.6K


