环境和人为因素塑造了一个广泛传播的海洋捕食者的食用生态
Elena Fernández-Corredor1, Alba Fuster-Alonso1,2, Francisco Ramírez1
1Institut de Ciències del Mar (ICM), CSIC, Barcelona, Spain.
The Journal of animal ecology
|July 10, 2025
概括
剑鱼的饮食随着环境变化而变化,如海面温度和捕鱼压力. 了解这些热带动态对于预测未来地中海和大西洋的食物网变化至关重要.
科学领域:
- 海洋生态海洋生态学
- 渔业科学 渔业科学
- 气候变化影响气候变化的影响.
背景情况:
- 热带生态学研究对于预测全球变化下的食物网络动态至关重要.
- 很少有研究将环境因素,食用相互作用和渔业等人类压力因素整合在一起.
- 剑鱼 (Xiphias gladius) 是地中海和大西洋的一个主要海上捕食者.
研究的目的:
- 为了研究西地中海和邻近的大西洋的剑鱼的食物营养生态.
- 分析剑鱼饮食与环境,生物和人类驱动因素之间的关系.
- 在气候变化情景下,预测未来剑鱼饮食的变化.
主要方法:
- 利用贝叶斯稳定同位素混合模型来估计剑鱼的饮食成分.
- 采用通用添加模型 (GAMs) 来将饮食估计与环境和人为因素联系起来.
- 在气候场景下开发了猎物消费的空间预测和未来预测.
主要成果:
- 剑鱼的饮食因海面温度 (SST),混合层深度 (MLD) 和叶绿素-a (Chl) 而有显著变化.
- 捕鱼压力也影响了剑鱼的饮食组成.
- 观察到饮食的区域差异,加拿大群岛和地中海西部附近的鱼消费量较高,加迪斯湾的冰生物体更高.
结论:
- 提供了量化证据,将大规模渔业压力和环境条件与剑鱼的饮食联系起来.
- 将食用相互作用纳入未来的预测可以提高对捕食者对全球变化的反应的理解.
- 结果对于评估剑鱼的饮食和改进未来的分布模型有价值.
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