DNA 条形码揭示了热带红树林河口的浮游生物群的时间变化及其与环境变量之间的关系
Suman Nama1, Ashna Shanmughan1, Sahina Akter1
1Fisheries Resource Harvest and Post-Harvest Management Division, ICAR-Central Institute of Fisheries Education, Mumbai-400061, India.
Environmental monitoring and assessment
|August 29, 2025
概括
卡兰贾河口支持多种鱼幼虫 (浮游生物),在季风季节丰富. 气温和盐度等环境因素对这些季节性变化产生重大影响,使河口
科学领域:
- 海洋生物学
- 鱼类学
- 生态学
背景情况:
- 红树林河口是鱼类繁殖和发展的关键息地.
- 了解浮游生物的动态对于评估渔业健康和生态系统功能至关重要.
研究的目的:
- 研究卡兰贾红树林河口的季节性浮游生物多样性和丰富性.
- 确定影响浮游生物分布和社区结构的关键环境因素.
- 通过综合分类方法,建立该地区鱼类浮游生物多样性的基线.
主要方法:
- 从2022年1月到2023年3月的季节性浮游生物采样.
- 使用形态特征和DNA条形码识别物种.
- 包括冗余分析 (RDA) 和生物环境分析 (BIO-ENV) 在内的统计分析,以将环境参数与浮游生物组合相关联.
主要成果:
- 鉴定出来自16个家族的24种浮游生物,其中Mugilidae (20%) 和Engraulidae (12%) 占主导地位.
- 在季风季节出现了最大的浮游生物,这表明河口作为产卵场的作用.
- 确定了水温,盐度,溶解氧,酸盐和透明度是关键的环境驱动因素.
- 生物多样性指数 (Shannon-Wiener,Margalef,Pielou) 显示了不同的浮游生物动态.
- 首次记录了Tridentiger barbatus和Scombrops sp. 这两种类型的动物. 在Karanja河口.
结论:
- 卡兰贾河口表现出丰富的浮游生物多样性,特别是在季风期间,作为一个重要的苗圃.
- 环境参数在很大程度上影响了季节性浮游生物群,强调了对息地的监测的必要性.
- 这项研究为生物多样性保护,资源管理和红树林生态系统的可持续实践提供了关键数据.
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