How consumption and fragmentation of macrophytes by the invasive crayfish Procambarus clarkii shape the macrophyte communities of temporary ponds

Carreira, Bruno M.; Dias, Maria P.; Rebelo, Rui

doi:10.1007/s10750-013-1651-1

Cited by 48 publications

(21 citation statements)

References 35 publications

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“…To conclude, based on the two population descriptors we studied, we largely mitigate the general message that the red swamp crayfish always negatively impacts amphibian communities, which has become commonplace in the literature. Importantly, although crayfish are often expected to render waterbodies unsuitable for amphibian reproduction, notably by altering plant communities (Carreira, Dias, & Rebelo, 2014), we did not find significant relationships between crayfish and aquatic vegetation cover. The coexistence of amphibian communities with the invasive crayfish is probably promoted by specific conditions (as discussed earlier) that are suitable for amphibians.…”

Section: Insights Into Species Coexistencecontrasting

confidence: 80%

Variable effects of an invasive species on the reproduction and distribution of native species in pond networks

2019

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The arrival of non‐native species in a community can be deleterious for native species. The joint investigation of several descriptors of native populations susceptible to invaders, under different invasion contexts, may help in predicting the outcome of their co‐occurrence with invasive species. Moreover, empirical studies seldom document the relative importance of the effects of invasive species on native species compared with other factors. Using survey data, we evaluated whether reproduction (larval density) and distribution of breeding sites of three amphibian species (Rana dalmatina, Lissotriton helveticus, and Triturus marmoratus) were related to the presence of invasive red swamp crayfish Procambarus clarkii, compared to other native predators, habitat, and landscape features, in two pond networks that differed in invasion intensity. The red swamp crayfish was only negatively associated with the larval density of one amphibian species studied. Its effect size was similar to that of some native predators, and much smaller than that of the canopy cover of ponds. Amphibians were widespread in the two pond networks. The occupancy of only one species in each network was negatively related to crayfish presence, while the occupancy of all species was negatively related to fish presence. The distribution of amphibian breeding sites was positively associated with aquatic vegetation cover. Negative associations between amphibians and red swamp crayfish were detected only in a few cases, even in the most invaded area, and thus results were less alarming than in previous studies. Differences in ecological traits of native amphibians and interactions with other environmental factors may explain the variable effects of red swamp crayfish on native amphibian populations.

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Section: Insights Into Species Coexistencecontrasting

confidence: 80%

Variable effects of an invasive species on the reproduction and distribution of native species in pond networks

2019

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“…Based on the results presented, it will be important to assess how different densities of crayfish may affect the populations of D. polymorpha, taking into account the possibility of interference competition, as well as the effects of the presence of alternative prey, or even alternative food items, like detritus or macrophytes (Carreira et al 2014). The effects of satiation should also be studied further, as it is still unknown whether crayfish may further reduce their consumption of zebra mussels after a long period.…”

Section: Discussionmentioning

confidence: 99%

Modelling the predation effects of invasive crayfish,Procambarus clarkii(Girard, 1852), on invasive zebra mussel,Dreissena polymorpha(Pallas, 1771), under laboratory conditions

Gonçalves

Gherardi²,

Rebelo

2016

Italian Journal of Zoology

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The functional response of a predator is a key factor regulating the population dynamics of predator-prey systems. This aspect of predatory behaviour must be assessed together with the effects of satiation by overabundant prey when evaluating the potential of biocontrol. The goals of this study were: (1) to identify the consumption rates of juvenile stages of the invasive zebra mussel, Dreissena polymorpha, by the invasive crayfish Procambarus clarkii; (2) to determine the predator functional response; (3) to evaluate the effects of predator satiation on the intensity of predation; and (4) to model the potential impacts of predation by this crayfish on zebra mussel populations. When presented with a range of mussel abundances, P. clarkii showed a functional response of type II, where the mortality of prey increases with decreasing prey abundance. P. clarkii also exhibited a satiation effect, diminishing its consumption rate from 33 mussels/day to 6 mussels/day over a 6-day period. By combining the effects of the functional response and of predator satiation we produced a model that predicts the complete consumption of local populations of up to 150/160 juveniles by one single crayfish over the period of 1 month. This impact may be important in low-density populations or in populations at equilibrium of D. polymorpha, and will be greater the higher the synchronization between the prey reproductive cycle and the activity period of the predator.

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“…Other invasive species such as introduced predatory aquatic invertebrates and fishes are a concern for amphibian populations and may contribute to global amphibian decline because larval amphibians are extremely vulnerable to vertebrate and invertebrate predators (Alford and Richards, 1999). In recent years, one of the most important pests in Iberian Peninsula wetlands, streams and ponds has been the crayfish Procambarus clarkii, which has affected the ecosystem dynamics and caused large socio-economic damage, mainly to rice fields in these areas (Beja, 1996;Gutiérrez-Yurrita, 1997;Twardochleb et al, 2013;Carreira et al, 2014). P. clarkii is a native of North-America and it has become invasive in many continental aquatic Mediterranean ecosystems (Taylorab et al, 1996;Gonçalves et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of the invasive crayfish Procambarus clarkii on growth and development of Pelophylax perezi tadpoles in field conditions

Saura-Mas¹,

Benejam²

2019

Anim. Biodiv. Conserv.

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Introduced predatory aquatic invertebrates may contribute to the global decline of amphibians as their larval are extremely vulnerable to predators. The objective of this study was to examine the effects of the predatory invasive crayfish Procambarus clarkii on the growth and development of native Iberian green frog tadpoles, Pelophylax perezi, in field conditions. We hypothesized that P. clarkii might affect P. perezi development by (a) inducing a delay in its metamorphosis and (b) reducing survival and mass of metamorphs. The experiment was developed in two ponds (with and without P. clarkii’s presence) in the Natural Park of Aiguamolls de l’Empordà (NE of the Iberian Peninsula). For each pond, groups of 10 tadpoles were randomly assigned to 15 cylindrical field enclosures. These enclosures avoided direct contact (i.e. predation) between both species. Our results suggest that, in field conditions, the presence of P. clarkii accelerates metamorphosis of P. perezi tadpoles. The higher growth rate of P. perezi through shorter larval periods could be the result of behavioural plasticity in response to the strong pressure imposed by P. clarkii. This conclusion would be in accordance with the hypothesis that phenotypic plasticity plays an important role in the conservation of P. perezi in front of biological invasions.

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How consumption and fragmentation of macrophytes by the invasive crayfish Procambarus clarkii shape the macrophyte communities of temporary ponds

Cited by 48 publications

References 35 publications

Variable effects of an invasive species on the reproduction and distribution of native species in pond networks

Variable effects of an invasive species on the reproduction and distribution of native species in pond networks

Modelling the predation effects of invasive crayfish,Procambarus clarkii(Girard, 1852), on invasive zebra mussel,Dreissena polymorpha(Pallas, 1771), under laboratory conditions

Effects of the invasive crayfish Procambarus clarkii on growth and development of Pelophylax perezi tadpoles in field conditions

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