捕食品质的物种内变化影响了顶级捕食者的消费率
Stephanie E Nehasil1,2, Juan P Zwolinski2,3, Emmanis Dorval2,4
1Department of Ecology, Behavior, and Evolution, School of Biological Sciences, University of California, San Diego, La Jolla, California, USA.
The Journal of animal ecology
|October 28, 2025
概括
捕食者的食成功取决于物种内部的猎物质量变化. 即使考虑到大小,捕食者也可能需要消耗两倍于低质量的猎物,从而影响生态系统的弹性.
科学领域:
- 海洋生态海洋生态学
- 生物能源学 生物能源学
- 渔业 科学 渔业 科学
背景情况:
- 猎物质量是捕食者-猎物动态的一个关键特征.
- 猎物质量对捕食者的影响在物种内部的变化还没有得到充分的研究.
- 加利福尼亚现行生态系统 (CCE) 中的顶级捕食者依赖关键的猎物物种.
研究的目的:
- 为了建模捕食品质的种内变化如何影响捕食者食.
- 评估猎物大小,成熟度,季节和地区对猎物能量含量的影响.
- 为加利福尼亚海狮 (Zalophus californianus) 整合猎物能量模型与捕食者生物能量.
主要方法:
- 模拟了Engraulis mordax,Sardinops sagax和Doryteuthis opalescens的能量密度和含量.
- 根据猎物大小,成熟度,季节和地区分析的变化.
- 综合调查结果与加利福尼亚州的海狮能源预算.
主要成果:
- 在猎物质量中发现了显著的物种内部变化,特别是在鱼类中.
- 猎物质量因大小,成熟度,季节和地区而异,反映了生命历史和海洋学条件.
- 捕食者的日常生物质量需求可以根据猎物的质量变化翻一番.
结论:
- 在物种内部的猎物质量变化显著影响掠食者食需求.
- 较小的猎物个体对许多捕食者来说在能量上是不切实际的.
- 纳入物种内变异对于准确的生物能源学模型和预测生态系统对气候变化和资源开发的反应至关重要.
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