Efficiency of aquatic PIT-tag telemetry, a powerful tool to improve monitoring and detection of marked individuals in pond environments

Duret, Clément; Pille, Fabien; Denoël, Mathieu

doi:10.1007/s10750-022-04888-8

Cited by 7 publications

(10 citation statements)

References 77 publications

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“…Vegetation promotes the complexity of aquatic microhabitats, can increase the availability of prey (such as insects) and can provide shelter to predators (Briggs et al 2019;Hamer et al 2021). Deep ponds can also give shelter to adults (Duret et al 2022). Although the depth of ponds is not strongly correlated to drying risk in the studied ponds (see Suppl.…”

Section: Predictors Of Habitat Invasibilitymentioning

confidence: 86%

“…The area is mainly composed of forests and traditionally managed open landscapes. It hosts both natural and artificial ponds and lacks streams and water connections between ponds (Denoël and Ficetola 2014;Duret et al 2022). Genetic analyses have identified water frogs in the study area as P. ridibundus (Dufresnes et al 2017), a species also named Pelophylax fortis in Europe, according to debated nomenclatural revisions (Dufresnes and Mazepa 2020), but the traditional taxonomic assignment is used here until a decision is taken by the code of nomenclature.…”

Section: Study Area and Speciesmentioning

confidence: 99%

“…Together, pond depth and a low drying risk allow permanent availability of water, which is essential for water frogs. The tadpoles of water frogs require long periods for metamorphosis, and adults remain in water bodies for even longer periods Duret et al 2022).…”

Section: Predictors Of Habitat Invasibilitymentioning

confidence: 99%

“…comm.). P. ridibundus was introduced at the end of the twentieth century in Larzac and has since expanded across the whole landscape (Dufresnes et al 2017;Duret et al 2022), where it preys on multiple native species (Pille et al 2021). Specifically, we aimed to (A) determine the level of invasion in the area (i.e.…”

Section: Introductionmentioning

confidence: 99%

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High habitat invasibility unveils the invasiveness potential of water frogs

et al. 2022

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Determining the invasibility of habitats by alien species is crucial for understanding their spread potential, the habitats the most at risk and to implement adequate management actions. This is urgent for introduced taxa that show high invasion potential across broad geographical scales. We here assess these processes in invasive Pelophylax water frogs which are widespread colonizers across Western Europe and for which the invasibility of habitats remains to be quantified. Specifically, we used hierarchical occupancy models in a Bayesian framework to identify local-and landscape-scale features that can enhance occupancy of the most common invasive water frog, the marsh frog (P. ridibundus), in southern France. Water frogs were highly detectable and showed high occupancy across the invaded landscape. The invaders expressed a very broad habitat tolerance for both local-and landscape-scale variables while their invasion was facilitated by the occurrence of deep, permanent ponds with abundant aquatic vegetation and high sun exposure. Cross-validation showed a good transferability of models across space. The high invasibility of a wide range of habitats by Pelophylax water frogs is alarming and unveils their invasiveness, contributing therefore to explain their success of invasion over broad geographic scales.

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Section: Predictors Of Habitat Invasibilitymentioning

confidence: 86%

Section: Study Area and Speciesmentioning

confidence: 99%

Section: Predictors Of Habitat Invasibilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High habitat invasibility unveils the invasiveness potential of water frogs

et al. 2022

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“…The surveys extended from early April to the end of July 2019, during the active period of marsh frogs in ponds (Duret et al, 2022).…”

Section: Diet Analysesmentioning

confidence: 99%

Functional and temporal facets of predation by marsh frogs across the aquatic–terrestrial ecotone of ponds and implications in the context of biological invasions

Pille,

Pinto,

Denoël

2023

Freshwater Biology

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Freshwater vertebrate predators can exert trophic control over aquatic and littoral communities. Among these predators, post‐metamorphic anurans exhibit a biphasic trophic spectrum by foraging in both terrestrial and aquatic habitats. Many studies have described their diet through the classical taxonomic classification of prey. However, these singular diet habits imply a complex, time‐dependent, realised trophic niche in which predation pressure occurs over many consumers that fill diverse functional roles throughout the aquatic and terrestrial interface of ponds. Among anurans, marsh frogs (Pelophylax ridibundus) have been introduced outside their range in many countries and are now invading nationwide areas, particularly in western Europe. Focusing on their foraging specificities will therefore further the understanding of the trophic role of these alien taxa in pond environments that are highly colonised. We collected stomach contents from 761 marsh frogs from introduced populations in 19 ponds in southern France once a month over 4 months of their active period in the spring. The populations of marsh frogs were studied in a geographic area that was devoid of native water frogs and their origin tracks back as far as south‐eastern Europe (i.e., more than 1,000 km from the studied sites, as evidenced previously by genetic analyses). Marsh frogs exhibited generalist and opportunistic feeding strategies. The trophic niche was strongly asymmetrical and broader in the terrestrial environment than in the aquatic environment. However, predation occurred in communities of large freshwater macroinvertebrates and amphibians. Whereas the composition of the terrestrial diet exhibited strong seasonal variations, predation pressure was continuously exerted on the same aquatic organisms over time. Primary consumers and consumers at higher trophic levels frequenting aquatic benthic, vegetated, pelagic, and surface microhabitats were preyed upon, underlying the multidimensional extent of the predation spectrum. The diversified feeding strategies of alien marsh frogs highlight the extent of potential ecological control by predation on pond communities. Because of their wide trophic niche, they exert predation pressure on most pond organisms, triggering possible top‐down control of the overall aquatic communities. Our results show that the integration of the functional traits and microhabitats of consumed prey may aid in a better understanding of how predation by anurans may target specific components of pond communities. More particularly, this study raises concerns about the predatory role of introduced anurans in the context of biological invasions.

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