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温度和色对淡水顶级捕食者的功能反应的影响
Viktor Nilsson-Örtman1,2, Erik Nilsson2, Christer Brönmark2
1Department of Environmental and Life Sciences, Karlstad University, Karlstad, Sweden.
The Journal of animal ecology
|March 17, 2026
概括
湖泊变暖和色对北方的食率的影响很小. 这些变化可能会通过猎物的行为间接影响捕食者-猎物动态,而不是直接影响食效率.
科学领域:
- 生态生态学 生态生态学
- 水生生态系统 水生生态系统
- 渔业科学 渔业科学
背景情况:
- 淡水湖泊正在经历变暖和色,改变生态系统结构.
- 这些环境变化对捕食者食率和食物级联的影响尚不清楚.
- 北方 (Esox lucius) 是关键的捕食者,在淡水系统中调节了自上而下的控制.
研究的目的:
- 研究温度和水的色对北方的功能反应和食率的影响.
- 开发和测试一种机械模型,预测这些因素如何影响捕食者食.
主要方法:
- 开发了一种机械模型来预测温度和色对鱼养的影响.
- 进行了实验室实验,以评估在不同温度和水色水平的功能反应.
- 从清到极其棕色的水的梯度上量化了养率.
主要成果:
- 温度和色对北方的食率产生了令人惊的微弱的直接影响,即使在极端的色水平.
- 在大多数条件下,皮克表现出II型功能反应,在冷清水中转变为IV型反应.
- 转向IV型反应可能与猎物的学龄行为季节性变化有关.
结论:
- 湖泊变暖和色对北方的食效率的直接影响似乎有限.
- 间接影响,通过猎物行为的变化来调解,对于食鱼鱼类来说可能更为显著.
- 色对淡水生态系统的影响可能主要是通过自下而上的机制来运作,而不是改变掠食者食的成功.
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