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在澳大利亚的黑夏大火之后,一个高度游牧的物种在食息地使用中发生了大陆范围的转变
Sienna C Grady1, Justin A Welbergen1, Matthias M Boer1
1The Hawkesbury Institute for the Environment, Western Sydney University, Richmond, New South Wales, Australia.
Global change biology
|November 11, 2025
概括
澳大利亚黑夏大火影响了灰头飞狐 (Pteropus poliocephalus) 的息地. 这些游牧蝙蝠将食转移到质量较差的地区,这表明它们具有弹性,但气候变化干扰可能对它们的人口产生负面影响.
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
- 保护科学 保护科学
背景情况:
- 由于气候变化,包括野火在内的极端生态干扰正在增加.
- 这些干扰对游牧物种,如灰头飞狐 (Pteropus poliocephalus) 的影响尚不清楚.
- 2019/2020年澳大利亚黑夏大火对P. poliocephalus的范围产生了重大影响.
研究的目的:
- 为了检查P. poliocephalus在黑夏大火爆发之前和之后如何利用食息地.
- 评估大火对优先食息地的影响,以及随后息地使用的转变.
- 了解气候变化引起的干扰对P. poliocephalus种群的弹性和潜在的负面影响.
主要方法:
- 在火灾前 (2012-2017年) 和火灾后 (2022-2024年) 期间,比较了P. poliocephalus在火灾前 (2012-2017年) 和火灾后 (2022-2024年) 食地点的洲际规模遥测数据.
- 进行了与烧毁区域和息地质量/覆盖面数据的食地点的空间叠加分析.
- 分析了因大火干扰而选择食地点的变化.
主要成果:
- P. poliocephalus首选在高质量,高覆盖度的息地食,这些息地受到大火的影响不成比例.
- 在火灾发生后,食活动重新分布到未燃烧的,质量较差,覆盖面较低的息地,包括以前未访问的内陆地区.
- 该物种表现出流动性和弹性,但向边缘息地转移表明对该物种的潜在负面影响.
结论:
- 脊髓灰质炎的极端流动性有助于抵御大火造成的广泛息地丧失.
- 观察到的转移到边缘食息地引起了人们对资源可用性和人口可持续性的担忧.
- 动态的环境和人口数据对于评估气候变化对游牧物种的影响和为保护战略提供信息至关重要.
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