季节性食控制驱动了基础海洋足动物的种群变异性
Isabel A Honda1,2,3, Lucas P Medeiros4, Cameron R S Thompson4,5
1Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA. ihonda@mit.edu.
Scientific reports
|October 15, 2025
概括
捕食者通过季节性循环控制缅因湾的Calanus finmarchicus种群. 春季丰富的燃料捕食者增长,导致秋季种群的上下压力,影响生态系统模型.
科学领域:
- 海洋生态海洋生态学
- 动物浮游生物种群动态
- 热带相互作用 热带相互作用
背景情况:
- 鱼 (Calanus finmarchicus) 是缅因湾生态系统中的一个关键物种,它将初级生产者与更高的食物营养水平联系起来.
- 了解影响其人口变化的因素对于预测生态系统对气候变化的反应至关重要.
- 形成C. finmarchicus丰度的特定生物驱动因素,特别是掠食,尚未完全理解.
研究的目的:
- 评估捕食者对缅因湾Calanus finmarchicus丰度的影响.
- 研究C. finmarchicus种群的季节性和跨年性食物控制模式.
- 通过结合季节性热带机制,为生态系统模型提供信息.
主要方法:
- 分析了四十多年的缅因湾调查数据.
- 量化C. finmarchicus及其捕食者之间的捕食者-猎物动态.
- 评估热带控制的季节性结构.
主要成果:
- 强有力的证据表明,C. finmarchicus. 具有季节性结构的营养控制.
- 发现春季C. finmarchicus的丰富性推动了年中掠食者种群的增加.
- 随后,掠食者种群的增加对秋季C. finmarchicus种群施加了显著的上下压力.
结论:
- 捕食者-猎物动态在调节C. finmarchicus种群方面发挥着主导作用,特别是在深盆地.
- 下向和上向控制之间的相互作用因季节性而变化.
- 将季节性热带机制纳入生态系统模型对于改善环境变化下的预测至关重要.
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