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作为澳大利亚萨凡纳的生态系统工程师的异国情调的大草食动物:它们是否促进捕食者运动?
Georgina Neave1, Brett P Murphy1, Tiwi Rangers2
1Research Institute for the Environment and Livelihoods Charles Darwin University Casuarina Northern Territory Australia.
Ecology and evolution
|July 10, 2025
概括
像丁哥和猫这样的陆地捕食者更喜欢在澳大利亚的草原上使用由大草食动物创建的游戏路径. 这种优先使用表明,管理大草食动物小径可能会影响捕食者活动并使本地物种受益.
科学领域:
- 生态生态学 生态生态学
- 野生动物管理 野生动物管理
- 保护生物学 保护生物学
背景情况:
- 陆地哺乳动物捕食者利用线性特征来增强运动和狩猎成功.
- 巨型草食动物创造的狩猎步道是捕食者生态学中研究不足的线性特征.
- 奇特的大草食动物在许多完整的景观中普遍存在,创造了广泛的小径网络.
研究的目的:
- 调查澳大利亚北部的沙瓦纳地区的丁哥 (Canis familiaris) 和猫 (Felis catus) 使用大型草食动物创造的狩猎小径.
- 为了比较狩猎小径上的捕食者活动与相邻的不受干扰的植被.
- 探索植被结构和猎物活动如何影响捕食者对游戏路径的使用.
主要方法:
- 在澳大利亚北部沙瓦纳地区的52个地点部署了104个摄像头陷 (每个地点2个).
- 放置一个摄像头在游戏路径上,第二个在60米以内不受干扰的植被中.
- 在狩猎小径上与相邻的植被相比,对丁哥和猫的检测率进行了比较.
主要成果:
- 丁哥在狩猎小径上被发现的可能性是相邻植被的34倍.
- 猫在狩猎小径上被发现的可能性是相邻植被中的6倍.
- 捕食者在狩猎小径上的活动表明,他们优先使用这些线性特征.
结论:
- 奇异的大草食动物创建的广泛的游戏路径网络可能会促进大规模的掠食者在草原中的移动.
- 控制异国情调的大草食动物可能会破坏丁哥和猫的活动,可能有助于本地猎物物种.
- 需要进一步的研究,才能充分理解野生动物在沙漠生态系统中的生态路径的生态作用.
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