Fish size structures in lakes of the Lower Mississippi River floodplain

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-08-13 DOI:10.1111/fwb.14313

L. E. Miranda, D. J. Dembkowski

引用次数: 0

Abstract

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密西西比河下游洪泛区湖泊中的鱼体大小结构

密西西比河下游的洪泛区包括 1350 个常年湖泊，这些湖泊是由河道变迁和其他水力流变过程在漫长岁月中雕刻而成的。尽管这些水体的产地相似，但它们的形态和演替阶段却千差万别，展现了从水生湿地到森林湿地的自然轨迹。这种地理、形态和时间上的多样性造就了动态多样的鱼类群落。我们研究了这些洪泛平原湖泊中鱼类群落的大小结构是如何与主要的湖内和湖外环境因素相关联的。在其中 30 个湖泊样本中，我们采用标准化程序采集了鱼类的长度，从而构建了一个按湖泊长度划分的群体矩阵。同样，还收集了湖内和湖外环境描述因子，以构建逐湖变量矩阵。采用基于距离的线性模型来评估鱼体大小结构与环境描述因子之间的关联。较小的鱼通常与浊度、叶绿素-a、藻蓝蛋白和周围农业水平的增加有关。与农业景观和连通性降低有关的浅层高富营养化洪泛平原湖泊经历着恶劣的物理化学环境。这些条件似乎阻碍了持续鱼类群落的形成，但可能会给幼鱼或寿命较短的小型物种带来生存优势。相反，较大的鱼类与湖泊深度、水透明度、连通性和周围森林-湿地范围的增加有关。在较深和较清澈的湖泊中，群落的稳定性和大小结构都有所提高，这表明这些条件有利于多年龄组的长寿物种的发展。增强的连通性促进了稳定性的提高，这也使得大型流动物种得以存在。大小结构评估可作为洪泛平原湖泊中一个有价值的生态和生物多样性指标。大小结构评估可以补充甚至取代传统的分类分析，并加强对这一巨大而重要的自然资源的监测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.