揭示食用相互作用:一个实地实验,研究了不同度的人口对食草和捕食模式的影响
Inés María Alonso-Crespo1, Juan Antonio Hernández-Agüero2,3
1Institute of Ecology Leuphana Universität Lüneburg Germany.
Ecology and evolution
|September 4, 2023
概括
人类人口密度对度的鸟类捕食有不同的影响,在较高的度增加,在较低的度减少. 草食水平在较低度处较高,不受城市化的影响.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 城市生态城市生态学
背景情况:
- 捕食和食草等物种相互作用对生态系统功能至关重要,例如害虫控制和营养循环.
- 人类活动,包括城市化,破坏了这些食用关系,导致生物多样性丧失.
- 热带相互作用受到度梯度的影响,人类的压力可能会改变这些动态.
研究的目的:
- 为了调查人类人口密度对食用相互作用的影响是否在度之间有所不同.
- 测试人类压力在不同度位置不同影响掠食和食草的假设.
主要方法:
- 在两个度 (~53°N和~50°N) 选择了18个研究地点,人类人口密度 (HPD) 不同.
- 从叶子图像中评估了使用人工毛虫在欧洲树上的鸟类掠食,并估计了昆虫食草.
- 采用遥感技术来量化人体压力.
主要成果:
- 鸟类掠食强度对跨度的HPD反应相反:在~53°N上升,在~50°N下降.
- 昆虫草食在较低度 (~50°N) 显著高于较高度 (~53°N).
- 城市化并没有显著影响草食水平,但度和HPD影响了掠食模式.
结论:
- 热量关系是复杂的,并因人类活动和度变化而动态改变.
- 城市热岛效应可能不利于低度地区的某些物种,而较温和的冬季可能有利于高度地区的物种.
- 未来的气候变化评估,特别是在城市环境中,必须整合人类的压力和度梯度,以了解生态后果.
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