亚北极鹿群的迁移和扩展范围以及相关的植被变化
Kathleen M Orndahl1, Torsten W Bentzen2, Logan T Berner1
1School of Informatics, Computing and Cyber Systems, Northern Arizona University, Flagstaff, Arizona, USA.
概括
鹿种群的增长导致了范围的变化和鱼料的减少,这可能导致群体的减少. 这突显了动物草食对北极植被和野生动物动态的影响.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 遥感 遥感 遥感 遥感
背景情况:
- 气候变暖改变了北极和北极植被,影响了野生动物息地和料.
- 野生动物群体通过食和践踏影响植被,在生态系统对气候变化的反应中发挥关键作用.
- 密度依赖的过程,如料减少,可以影响野生动物种群和改变植被动态.
研究的目的:
- 评估鹿 (Rangifer tarandus) 在人口增长和减少期间 (1992-2020) 的群体范围特征.
- 通过遥感来分析鹿空间密度与植被变化之间的相关性.
- 了解草食在塑造植被和影响鹿种群趋势中的作用.
主要方法:
- 评估了阿拉斯加和尤肯领地的迁徙鹿群的分布特征.
- 使用遥感数据分析鹿的相对空间密度和植被变化 (植物功能类型覆盖).
- 与鹿密度和范围使用模式相关的植被覆盖变化 (柳叶,叶灌木).
主要成果:
- 卡里布种群密度显著增加,特别是在分娩区 (增加了8倍).
- 鹿的范围扩大,夏季范围的大小增加了一倍,核心范围的重叠减少了一半.
- 在高密度大猩猩地区,覆盖更大程度下降,而不太美味的灌木覆盖增加,这表明料条件发生了变化.
结论:
- 由鹿食草和践踏驱动的料条件的变化,可能导致群体数量下降.
- 遥感植被指标可以评估草食影响,但现场数据对于验证至关重要.
- 了解野生动物密度,植被变化和气候之间的相互作用对于北极生态系统管理至关重要.
关键词:
一个四十英里的卡里布群.兰吉弗·塔兰杜斯 (英语:Rangifer tarandus) 是一个有色人种.卡里布 (Caribou) 是一个野生动物.气候变化 气候变化 气候变化密度依赖关系密度依赖关系料料是一种料.草食动物 草食动物范围扩展 扩展范围扩展远程传感是一种遥感技术.灌木扩张 灌木扩张植被变化 变化 植物变化更多相关视频
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