有证据表明,长距离的陆地迁徙者在适应性,大规模的范围转移
Eliezer Gurarie1, Chloe Beaupré1, Ophélie Couriot1
1State University of New York, College of Environmental Science and Forestry, Syracuse, New York, USA.
Global change biology
|November 28, 2024
概括
阿拉斯加的迁徙大鹿 (Rangifer tarandus) 由于气温升高,它们的冬季范围向东移动. 这种适应,由恶劣条件的集体记忆驱动,部分缓解,但没有完全扭转死亡率的增加.
科学领域:
- 生态生态学 生态生态学
- 动物行为 动物行为
- 适应气候变化 适应气候变化
背景情况:
- 长途迁徙是移动陆地动物在季节性环境中的关键适应.
- 了解迁徙动物对快速环境变化和适应机制的弹性至关重要.
- 北极地区正在经历快速变暖,影响野生动物息地和行为.
研究的目的:
- 为了调查西北极鹿群 (Rangifer tarandus) 冬季息地发生的剧烈变化.
- 分析适应性意义和驱动力,以应对环境变化而改变这一范围的变化.
- 了解集体记忆和决策在鹿迁徙模式中的作用.
主要方法:
- 在2012年至2020年期间,西北极群的冬季息范围记录了超过500公里的转移.
- 分析了与范围转移相关的近200个已记录的死亡事件.
- 在不同息地与迁徙模式和集体记忆的冬季生存率相关联.
主要成果:
- 鹿从海上原转移到山区过冬.
- 海上原的冬季生存率显著下降,而山区的生存率中等,变化较小.
- 范围的转移部分缓解了死亡率的增加,但并没有完全逆转,有证据表明冬季营养不佳.
- 集体记忆前冬天恶劣的条件是南向迁移的强有力的预测因素.
结论:
- 西北北极群的范围变化表明,它们在快速环境变化时表现出适应性行为.
- 集体决策和记忆在面对动态环境的高度移动物种的健康结果中发挥着重要作用.
- 虽然适应性,但范围的转变凸显了迁徙动物在充分补偿气候变化影响方面所面临的挑战.
关键词:
阿拉斯加阿拉斯加阿拉斯加阿拉斯加行为可塑性 行为可塑性卡里布 (Caribou) 是一个野生动物.气候变化 气候变化 气候变化集体记忆 集体记忆是一种集体的记忆.迁移范围的迁移范围.雪 雪 雪 雪 雪 雪 雪幸存者 幸存者 幸存者温度的温度的温度的温度的温度风的风,就是风的风.更多相关视频
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