热带范围延伸 草食鱼通过与本地温带物种群结群获取食利益
Mario Minguito-Frutos1, Xavier Buñuel2, Candela Marco-Méndez2
1Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Carrer d'Accés a la cala Sant Francesc 14, 17300, Blanes, Girona, Spain. mminguito@ceab.csic.es.
Scientific reports
|October 8, 2025
概括
在地中海,扩展范围的鱼形成混合物种群,提高了它们的食效率. 这种群居行为有助于它们的建立,并可能解释热带生态系统中草食性增加.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 侵入性物种研究研究 侵入性物种研究
背景情况:
- 热带化正在通过引入新物种改变温带海洋生态系统.
- 扩展范围的物种,如鱼,可以与本地物种形成新的组合.
- 地中海东部经历了生态系统退化后,子鱼的到来.
研究的目的:
- 调查混合物种鱼对入侵性鱼和本地草食动物的食活动的影响.
- 了解社会行为如何影响范围扩大鱼类的生态影响.
主要方法:
- 观察了250个鱼群,按物种组成分类它们 (本地,入侵,混合).
- 记录了鱼类的食行为,特别是咬伤率,与群体大小和组成有关.
- 分析了本地 (Sarpa salpa,Sparisoma cretense) 和入侵 (Siganus rivulatus,Siganus luridus) 物种之间的集群关系.
主要成果:
- 侵入性鱼 (Siganus spp.) 是一种入侵性的鱼. 它们是高度群居的,与本地物种相处,如Sarpa salpa.
- 侵入性物种增加了食咬伤率,在单个和混合物种群中增加了群体大小.
- 本地物种仅在单个物种群体中增强了食咬伤率,并增加了小鱼群的大小.
结论:
- 与本地物种不同,扩展范围的鱼从混合物种协会中获得食的好处.
- 侵入性物种在较大群体中的食效率提高可能会导致它们的生态主导地位.
- 侵入性草食动物的群居行为是推动海洋生态系统热带化影响的关键因素.
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