不对称的掠食强度会在主要和次要猎物中产生不同的反掠食者行为
Corbin C Kuntze1, M Zachariah Peery1, Jonathan N Pauli1
1Department of Forest and Wildlife Ecology, University of Wisconsin, Madison, Wisconsin, USA.
The Journal of animal ecology
|August 29, 2024
概括
捕食者会影响猎物的行为,但风险管理有所不同. 息地和掠食强度为主要与次要猎物物种形成了不同的反掠食者策略.
科学领域:
- 生态生态学 生态生态学
- 行为生态学 行为生态学
- 野生动物科学 野生动物科学
背景情况:
- 捕食者通过直接消费和诱导反捕食者行为来影响猎物,从而导致非消费效应.
- 了解猎物如何在自然环境中管理风险是复杂的,因为研究往往侧重于单个捕食者-猎物相互作用.
- 反捕食者的行为对于猎物的生存至关重要,并且可以通过生态系统产生级联效应.
研究的目的:
- 调查掠食强度和环境环境如何影响反掠食者食策略.
- 为了对比一个主要猎物 (脚木鼠) 和一个二次猎物 (鹿鼠) 的风险管理行为,它们处于斑点猫头的掠夺风险之下.
- 确定息地类型是否与捕食者活动相互作用,以塑造猎物对风险的反应.
主要方法:
- 在斑点猫头活动高低的地区部署了实验性食补丁.
- 实施了人工风险和安全避难处理,以模拟不同级别的威胁.
- 在不同的森林类型和避难条件下,在寻找食物的过程中,监测了脚木鼠和鹿小鼠的行为.
主要成果:
- 木鼠在成熟森林和风险较高的地区表现出更高的警和减少食,避难效应取决于森林类型.
- 鹿鼠只对更危险的避难治疗表现出一致的行为反应,息地类型的影响最小.
- 息地与捕食者活动相互作用,以对主要和次要猎物的反捕食者反应进行不同的结构.
结论:
- 息地可以显著调节反捕食者反应,与捕食者活动相互作用,为不同的猎物创造独特的风险管理策略.
- 不对称的掠食会影响猎物的感知风险和行为策略,突出了风险影响研究中的关键偶然性.
- 考虑到初级和二级猎物动态,可以更全面地了解非消费性掠食效应如何影响人口和社区结构.
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