One frog to rule them all: wide environmental niche of invasive marsh frogs induces large co-occurrence patterns with native amphibian prey in ponds

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Fabien Pille, Luca Salomon, Anne-Constance Comau, Pauline Tendron, Clément Duret, Mathieu Denoël
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Abstract

Invasive alien anurans are introduced worldwide in freshwater ecosystems where they can have a strong impact on native organisms such as amphibians. The risk for natives is dependent on the degree of niche overlap and co-occurrence in pond-breeding sites. In the present study, we focused on alien marsh frogs (Pelophylax ridibundus) that are invading nationwide areas in Western Europe and which prey on both caudates and anurans. We assessed aquatic habitat preferences, pond use and environmental niche overlap between invasive populations of marsh frogs and five species of native amphibian prey of the Larzac plateau (southern France). Due to their large environmental niche, marsh frogs have become the most ubiquitous amphibians in the area. Occupancy models revealed that they had aquatic habitat preferences (e.g., water depth and aquatic vegetation) similar to most species of native amphibians. This resulted in a large overlap between the environmental niche of the invader and its potential prey. The frequent coexistence in ponds therefore exposed native species to predation risk and other potential disturbances caused by marsh frogs. Altogether, these results highlight on the risks posed by such opportunist invaders for native amphibians that occur in their wide invasion range.

Abstract Image

一蛙定乾坤:外来沼泽蛙的广泛环境生态位诱发了与池塘中本地两栖动物猎物的大量共同出现模式
外来入侵无尾类动物被引入世界各地的淡水生态系统,对两栖动物等本地生物造成了严重影响。对本地生物的风险取决于池塘繁殖地的生态位重叠和共同出现的程度。在本研究中,我们重点研究了入侵西欧全国各地的外来沼蛙(Pelophylax ridibundus),它们同时捕食尾索类和无尾类。我们评估了沼蛙入侵种群与拉扎克高原(法国南部)五种本地两栖动物猎物之间的水生栖息地偏好、池塘利用和环境生态位重叠情况。由于沼蛙的环境生态位较大,它们已成为该地区最普遍的两栖动物。占据模型显示,它们对水生栖息地(如水深和水生植被)的偏好与大多数本地两栖动物相似。这导致入侵者的环境生态位与其潜在猎物之间有很大的重叠。因此,沼蛙在池塘中的频繁共存使本地物种面临捕食风险和其他潜在的干扰。总之,这些结果凸显了这种机会主义入侵者对其广泛入侵范围内的本地两栖动物造成的风险。
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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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