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全球对鱼类对湖泊息地结合的调查

Rebekah R Stiling¹, Julian D Olden², Stéphanie Boulêtreau³

¹School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA, 98105, USA. stilir@uw.edu.

|July 26, 2023

概括

淡水鱼在全球范围内利用来自近海和开水湖区的资源,这一过程被称为息地合. 这种结合因湖泊的海拔,气候和鱼类特征而异,突出显示了不同的养策略.

科学领域:

生态生态学生态生态学
淡水生物学淡水生物学
鱼类学鱼类学鱼类学

背景情况:

息地合,即消费者利用来自多个息地的资源,对于生态系统的运行至关重要.
淡水鱼经常表现出息地合,特别是在湖泊中的沿海 (近岸) 和海底 (开放水域) 区域之间.

研究的目的:

进行全球性调查,调查湖泊沿海和海域之间的淡水鱼类的息地合.
确定环境背景和消费者特征如何影响鱼类息地合的规模和变化.

主要方法:

利用鱼类稳定同位素值 (δ13C和δ15N) 的全球数据集开发了息地合指数.
采用贝叶斯的等级和非等级β回归来分析湖泊因素和鱼类特征的影响.

主要成果:

在全球淡水鱼类中观察到高息地合率,有显著的分类学差异.
息地结合在较低海拔湖泊和较冷的气候中更为明显;湖面面积,深度和海岸线复杂性显示出最小的影响.
运动和养特征与息地结合相关,但最大身体长度没有.

结论:

全球鱼类种群依赖于多样化的资源,证明了广泛的息地合.
诸如海拔和气候等环境因素显著调节鱼类息地合,而形态学也起着作用.
未来的研究应该探讨改变鱼类息地合的生态系统后果.

关键词:

碳碳碳碳碳碳消费者消费者消费者消费者功能性特征功能性特征功能性特征沿海的沿海地区稳定的同位素是稳定的.

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