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在一个大河流的食物网中,识别横跨热带层的招募来源

Shaley A Valentine^1,2, Kristen L Bouska³, Gregory W Whitledge²

¹Department of Evolution, Ecology, and Organismal Biology The Aquatic Ecology Laboratory, The Ohio State University Columbus Ohio USA.

Ecology and evolution

|April 7, 2025

概括

上密西西比河的捕食者和猎物依靠支流来招募,显示了跨食用水位的生态连接. 这项研究使用了石微量元素分析来追踪鱼类的起源.

科学领域:

生态生态学生态生态学
鱼类学鱼类学鱼类学
河流生态河流生态

背景情况:

水生群体通过资源流动相互连接,包括幼虫鱼 (新兵).
了解招募来源对于评估生态连接和食用相互作用至关重要.
微量元素分析提供了一种量化招聘来源的方法.

研究的目的:

确定大鱼和鱼捕食者及其猎物的附属招募贡献.
为了确定捕食者和猎物的招募来源是否在密西西比河上部结合在一起.
评估微量元素分析在食用猎物的实用性,用于生态研究.

主要方法:

使用激光除感应合质谱法对鱼耳石 (耳骨) 进行微量元素分析.
量化:的比例,以确定出生起源 (附带与居民).
对不同物种,研究范围和收集年份的招募模式进行比较.

主要成果:

掠食者和猎物鱼在所有研究范围的集合都从支流中招募.
猎物鱼类 (44%) 显示出比捕食者 (17%) 更高的附属征集率.
捕食者和猎物家族,研究范围和采样年份之间,招募模式是一致的.

结论:

附属鱼类作为猎物和捕食鱼类的一致招募来源,表明结合招募.
捕食者利用支流直接和间接通过他们的猎物依赖这些来源.
在消耗的猎物中分析微量元素是一种有效的方法,可以同时研究捕食者-猎物生态.

关键词:

组装组装组装组装环境历史环境历史出生地出生的起源出生的起源捕食者猎物捕食者猎物微量元素分析分析

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