徒步路径有助于高北极本土物种的传播
Deborah Zani1,2,3, Heike Lischke1, Jonas Åkerman2
1Dynamic Macroecology/Land Change Science Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland.
Ecology and evolution
|January 13, 2025
概括
人类活动,如徒步路径,加快了北极温暖的本土植物的传播. 这项研究表明,小径显著增加了植物传播率,突出显示了在受干扰的极地息地进行监测的必要性.
科学领域:
- 生态生态学 生态生态学
- 北极生物学 北极生物学
- 保护科学 保护科学
背景情况:
- 高北极环境面临着快速变暖和增加的人类活动,增加了外来物种引入和传播的风险.
- 由于这些联合压力,本地物种也可能经历变化的分布模式.
- 了解人类干扰的作用对于预测敏感北极地区的生态变化至关重要.
研究的目的:
- 调查人类干扰,特别是徒步路径如何促进北极本土植物Papaver dahlianum的传播.
- 模拟物种传播的空间模式和速率,区分本地传播和人类协助传播.
- 为了确定与地形和人类活动有关的P. dahlianum的息地偏好.
主要方法:
- 结合了历史发生记录 (1928-2018) 与当代调查 (2023) 关于在斯瓦尔巴德斯瓦尔巴德岛Isfjord Radio附近的P. dahlianum*丰度.
- 利用通用线性模型 (GLM) 来评估海拔高度和接近徒步道对物种密度的影响.
- 采用空间显式建模来模拟物种在不同的分散场景下 (本地与本地+轨道介导) 传播,并使用无人机衍生数据进行地形分析.
主要成果:
- 距离人类定居点的距离 (56%) 和接近徒步道的距离 (28%) 是P. dahlianum密度的重要预测因素 (GLM R2=0.755).
- 模拟的扩散包括小径效应达到了~30m/yr,准确地捕捉了历史范围,而局部扩散模型 (~2m/yr) 低估了它.
- *P. dahlianum*显然更喜欢带有低植被覆盖的石土壤,这可能是受路径践踏的影响.
结论:
- 人类活动,包括定居点和徒步路径,是加快北极物种范围变化的重要驱动因素,与气候变暖一起.
- 空间显式模型是预测物种传播的有效工具,并为有效的监测策略提供信息.
- 优先考虑对被扰乱的极地息地外来物种的监测和缓解措施,这对保护至关重要.
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