一种典型的通用掠食者的营养生态,红狐 (Vulpes vulpes)
A Balestrieri1, S Gigliotti2,3, R Caniglia4
1Dipartimento di Scienze e Politiche Ambientali, Università di Milano, via Celoria 26, 20133, Milan, Italy. alebls@libero.it.
Scientific reports
|April 4, 2024
概括
红狐 (Vulpes vulpes) 通过结合食物来维持一致的宏观营养素摄入量,类似于过度食肉动物. 然而,偏离这个目标营养比例的偏差可能会对狐种群和健康产生负面影响.
科学领域:
- 生态生态学 生态生态学
- 营养生态学 营养生态学
- 野生动物生物学 野生动物生物学
背景情况:
- 预计一般性物种可以平衡来自不同食物来源的宏观营养素摄入量.
- 红狐 (Vulpes vulpes) 是一个适应性强,机遇主义的捕食者,其饮食因地理位置而异.
- 了解红狐的饮食策略对于预测种群动态至关重要.
研究的目的:
- 为了确定红狐是否在整个欧洲范围实现一致的宏观营养素摄入量.
- 用营养几何学来评估红狐的目标宏观营养素比例.
- 为了研究饮食中宏观营养素平衡与狐种群密度 (作为健身的代理) 之间的关系.
主要方法:
- 在营养几何学框架内评估红狐的目标宏观营养素摄入量.
- 在不同的欧洲息地分析了狐的食成分.
- 意大利阿尔卑斯山的五个地区的狐密度与目标宏观营养素比例的相关偏差.
主要成果:
- 红狐表现出与超肉食动物相似的目标宏观营养素比率 (52.4%蛋白质,38.7%脂质,8.9%碳水化合物).
- 在城市和农村息地,碳水化合物摄入量偏离了目标.
- 在狐密度和观察到的宏观营养素比率与目标的偏差之间发现了负相关性.
结论:
- 红狐可以有效地结合食物资源,以满足特定的宏观营养素目标.
- 息地特定的饮食变化可能会产生健康成本,影响狐的丰富和分布.
- 营养素的可用性是影响野生动物种群的重要生物因素.
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