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Daniela Ghia^1,2, Gianluca Fea¹, Annagiulia Murtas¹

¹Dipartimento di Scienze Della Terra e Dell'Ambiente Università Degli Studi di Pavia Pavia Italy.

Ecology and evolution

|May 15, 2025

概括

欧洲的侵入性信号鱼表现出更大的适应性,在与本地白爪一起出现时,它们的饮食转变并改善了它们的状况. 这种摄食性可塑性有助于它们的入侵成功.

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
水生生态系统水生生态系统

背景情况:

信号 (Pacifastacus leniusculus) 是欧洲非常成功的入侵物种,威胁着本地种群.
侵入性和本地之间的共发生和相互作用没有得到充分的记录,这限制了我们对入侵动态的理解.
瘟疫 (Aphanomyces astaci) 是一个重大威胁,但生态特征也可能促进入侵.

研究的目的:

研究信号和本地白爪 (Austropotamobius pallipes) 的食物营养生态,它们在哪里共同存在,以及它们在哪里单独存在.
评估信号的食物,身体状况和瘟疫的存在是否影响它们的入侵成功和本地物种的流离失所.
了解驱动在淡水环境中传播的入侵物种的复杂生态相互作用.

主要方法:

稳定同位素分析 (碳和) 以评估热带关系.
通过SIBER和MixSIAR混合模型来量化利基重叠和饮食贡献.
胃含量分析和富尔顿/肝胰腺指数,以评估饮食和身体状况.

主要成果:

当单独存在时,信号和白爪呈现出不同的食物;当它们同时存在时,它们的显著重叠.
信号的饮食转向了白爪的饮食,成为主要消费者.
信号鱼与本地物种同时出现时表现出更好的身体状况,这表明在入侵前线的身体适应性得到改善.

结论:

侵入性信号鱼表现出了显著的食用可塑性,在与本地物种共同出现时适应其饮食并改善其状况.
这种适应能力是促进入侵进度和潜在的本地白爪的迁移的关键因素.
了解这些复杂的相互作用对于管理入侵和保护本地淡水生物多样性至关重要.

关键词:

奥斯特罗波塔莫比乌斯 (Austropotamobius pallipes) 是一种的动物.这就是Pacifastacus leniusculus.情况指数,状态指数.饮食饮食饮食饮食稳定的同位素是稳定的.胃中的内容.同情的物种类型.这是一个巨额的利基.

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