外来鱼类物种在伊朗卡鲁恩河流域的分布和扩张,伊朗
Mojgan Zare Shahraki1, Yazdan Keivany1, Eisa Ebrahimi Dorche1
1Department of Natural Resources, Isfahan University of Technology, Isfahan 84156-83111, Iran.
Fishes
|December 28, 2023
概括
外来鱼对伊朗卡鲁恩河流域的本土物种构成威胁. 环境因素和人类的影响促进了它们的传播,迫切需要为这个危的流域采取紧急保护措施.
科学领域:
- 鱼类学 鱼类学 鱼类学
- 生态生态学 生态生态学
- 保护生物学 保护生物学
背景情况:
- 外来鱼类物种在全球范围内构成重大生态威胁.
- 伊朗的卡鲁恩河流域是面临潜在入侵物种挑战的关键分水.
研究的目的:
- 评估卡河流域外来鱼类物种的分布和丰度.
- 确定影响外来鱼类分布的环境因素.
- 探索外来鱼对本地鱼群和水生生态系统的影响.
主要方法:
- 在低流量期间 (2018年11月至12月) 在39个地点进行了鱼类调查.
- 冗余分析 (RDA) 用于将外来鱼群与环境参数相关联.
- 一个双路径因果假说被开发来解释入侵动态.
主要成果:
- 确定了10种外来鱼类物种,占抽样个体的15.7%.
- 四种外来物种在被扣留的下游地区最为丰富.
- 高度,深度,电导率,水温,度,溶解氧气和河流宽度显著影响了外来物种的分布.
结论:
- 外来鱼的存在对卡河流域的本土鱼群产生了负面影响.
- 人类引起的水生生态系统退化促进了外来物种的入侵.
- 需要采取紧急的保护措施,以保护本地鱼类动物和临灭绝的卡河流域.
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