尼马虫作为河流环境变化的指标,具有不同程度的人为影响
Atsler Luana Lehun1, Gisele S C Duarte2, Ricardo M Takemoto1,2,3
1Universidade Estadual de Maringá, Programa de Pós-graduação em Ecologia de Ambientes Aquáticos Continentais, Av. Colombo, 5790, Jardim Universitário, 87020-900 Maringá, PR, Brazil.
Anais da Academia Brasileira de Ciencias
|September 20, 2023
概括
在Geophagus brasiliensis鱼中的寄生虫表明生态系统的健康状况. 污染地区的寄生虫多样性较低表明,这些寄生虫可以作为伊瓜苏河环境变化的生物指标.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 寄生虫学的寄生虫学
背景情况:
- 寄生虫社区反映了生态系统的健康状况.
- 巴西 (G. brasiliensis) 是一个潜在的生物指标物种.
- 环境影响在不同河流的位置上有所不同.
研究的目的:
- 评估G. brasiliensis寄生虫作为环境变化的生物指标.
- 分析鱼类寄生虫和污染水平之间的关系.
- 研究G. brasiliensis.中的内寄生虫的生物多样性.
主要方法:
- 在伊瓜苏河的三个不同环境影响的地点采样G. brasiliensis.
- 分析内寄生虫,专注于尼马托达类.
- 在不同地点比较寄生虫的数量和物种组成.
- 评估鱼类的相对状况因子 (Kn).
主要成果:
- 在69个G. brasiliensis标本中,有32个 (46.3%) 被寄生虫感染.
- 总共收集了56个内寄生虫标本,来自Nematoda类.
- 在中度退化地区观察到较高的线虫丰度和物种组成的显著差异 (点3).
- 没有发现鱼类状况因子 (Kn) 在不同地点之间存在显著差异或与线虫丰富度相关.
结论:
- 寄生虫G. brasiliensis的社区在受污染的环境中表现出减少的多样性.
- 这种减少的多样性与某些寄生虫物种的缺失以及具有不同污染反应的线虫的存在有关.
- G. brasiliensis寄生虫显示出作为检测环境变化和污染梯度的生物指标的潜力.
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