城市化,而不是侵入性灌木,通过修改动物活动改变了树种的命运
Mark E Fuka1, Brian M Connolly2, John L Orrock1
1University of Wisconsin-Madison Madison Wisconsin USA.
Ecology and evolution
|August 27, 2025
概括
全球环境变化如城市化和入侵物种影响动物活动和种子消费. 种子质量仍然是动物种子偏好的主要因素,超过环境影响.
科学领域:
- 生态学
- 环境科学
- 动物学
背景情况:
- 全球环境变化,包括城市化和入侵物种,可以改变动物的活动和相互作用.
- 粮食食动物在种子的生存和建立中起着至关重要的作用,因此了解它们的活动模式至关重要.
- 城市化和入侵物种之间的相互作用可能会协同影响动物的行为和种子掠食.
研究的目的:
- 研究城市化,入侵性灌木和季节性对动物活动和食的影响.
- 确定这些因素如何影响常见的食动物的种子去除率.
- 将观察到的动物活动模式与种子移除联系起来,以了解生态后果.
主要方法:
- 一个大规模的实地实验操纵了威斯康星州农村到城市森林梯度的入侵灌木 (Rhamnus cathartica,Lonicera maackii).
- 运动激活的摄像头记录了三种动物 (Peromyscus leucopus,Sciurus carolinensis,Tamias striatus) 在夏季和秋季的两个14天时间里的活动.
- 使用含有六种树种种子的种子仓库来量化种子的去除,
主要成果:
- 城市地区的Quercus种子清除率最高,可能与Sciurus carolinensis活动增加有关.
- 在Rhamnus cathartica被移除的土地上,Peromyscus leucopus活动在秋季特别高,这表明对资源的可用性有所反应.
- 动物种子偏好始终以种子质量为主,无论城市化或入侵灌木存在.
结论:
- 城市化和入侵物种改变了动物活动模式,对城市森林中的种子生存产生了潜在的后果.
- 季节性影响动物的行为, 像Peromyscus leucopus这样的特定物种对短期资源的可用性表现出反应.
- 种子质量是驱动动物种子选择的主要因素,强调其在生态相互作用和森林再生中的重要性.
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