在功能上相似的非本地和本地鱼物种之间,共存机制和个体的食物变化
Yingqiu Zhang1,2,3, J Robert Britton4, Daotian Huang5,6,7
1Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, No. 1 Xingyu Rd., Liwan District, Guangzhou, 510380, People's Republic of China. zyq@prfri.ac.cn.
Scientific reports
|November 9, 2024
概括
非本地和本地鱼类通过分割猎物资源共存,生态机会推动了利基差异化. 饮食可塑性和身体大小影响这些共存机制,对于理解入侵物种动态至关重要.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 渔业 科学 渔业 科学
背景情况:
- 了解物种共存对于预测非本地物种对生态的影响至关重要.
- 利基区分和适应性均等是物种共存的关键理论机制.
- 密切相关的物种共享猎物资源对于共存研究来说是一个独特的挑战.
研究的目的:
- 研究非本地鱼 (Cirrhinus mrigala) 与本地泥鱼 (C. molitorella) 之间的食用相互作用和共存机制.
- 确定生态机会和人体大小在跨和内特定利基区分中的作用.
- 为功能上相似的本地和非本地鱼类物种的共存提供一种机制性的解释.
主要方法:
- 对鱼的肠道内容进行DNA元编码,以分析食物相互作用.
- 在干旱和雨季 (2019年,2021年) 期间在珍珠河流域采样.
- 对跨和内特异性热量重叠和身体尺寸效应的比较分析.
主要成果:
- 与内部特异性重叠相比,较低的跨特异性热带重叠,表明稳定共存机制.
- 猎物资源中的生态机会推动了跨特定的利基分割,增强了内部特定的分割和利基扩张.
- 鱼体大小显著影响了区分,对海和泥有不同的影响.
结论:
- 鱼和泥鱼之间的共存是由稳定机制促进的,主要是 trofhic niche 分区.
- 饮食可塑性和身体大小是调解共存并可能促进非本地物种入侵的关键因素.
- 该研究阐明了密切相关的本地和非本地物种在共享环境中的共存背后的机制.
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