To breed or not to breed: past reproductive status and environmental cues drive current breeding decisions in a long-lived amphibian

Cayuela, Hugo; Besnard, Aurélien; Bonnaire, Éric; Perret, Haize; Rivoalen, J.J.; Miaud, Claude; Joly, Pierre

doi:10.1007/s00442-014-3003-x

Cited by 77 publications

(134 citation statements)

References 55 publications

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“…The risk of the waterbody drying out is the main mortality factor at egg and larval stages (Barandun & Reyer, 1997); the hydroperiod therefore has a strong impact on the risk of breeding failure in this species. A relatively high rate of adult survival and a high level of iteroparity allows individuals to skip reproduction opportunities (Cayuela, Arsovski, Thirion, Bonnaire, Pichenot, Boitaud, Brison et al, 2016;Cayuela, Arsovski, Thirion, Bonnaire, Pichenot, Boitaud, Miaud et al, 2016), especially when drought conditions are experienced during the breeding season (Cayuela et al, 2014).…”

Section: Biological Modelmentioning

confidence: 99%

“…First, leaving short hydroperiod waterbodies could reduce the risk of adult mortality caused by excessive water loss by evaporation through the skin (Cayuela et al, 2014;Tracy, 1976). First, leaving short hydroperiod waterbodies could reduce the risk of adult mortality caused by excessive water loss by evaporation through the skin (Cayuela et al, 2014;Tracy, 1976).…”

Section: Influence Of the Hydroperiod On The Movement Behaviour Of mentioning

confidence: 99%

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Manipulating waterbody hydroperiod affects movement behaviour and occupancy dynamics in an amphibian

et al. 2017

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Species that occur in ephemeral habitats such as temporary waterbodies have evolved specific strategies that allow them to respond to spatial and temporal variations in water availability and quality. Their life‐history strategies, involving complex life cycles, have evolved to allow individuals to escape deteriorating environmental conditions when a waterbody dries up. These adaptations have led to the emergence of complex movement behaviour, which might then be expected to affect the spatiotemporal dynamics of reproduction. To date, few empirical studies have investigated how the risks of waterbody drying out affects movement behaviour at the individual level and how movement decisions then shape waterbody occupancy dynamics. In this study, we examined this issue in an endangered amphibian, the yellow‐bellied toad (Bombina variegata). For this purpose, we experimentally manipulated waterbody hydroperiod and collected capture–recapture and presence–absence data in 334 waterbodies located in 15 B. variegata populations in the region of Geneva (Switzerland) during a 5‐year period (2012–2016). The results of our analyses reveal that the waterbody hydroperiod affects this species' movement behaviour. Adults were less likely to leave waterbodies with a long hydroperiod both intra‐ and inter‐annually. In addition, breeding occupancy strongly depended on a waterbody's hydroperiod. In particular, interannual changes in breeding occurrence were less frequent in waterbodies with a long hydroperiod. Our findings show that the hydroperiod strongly affects ecological processes at different levels, from individuals' movement decisions to waterbody occupancy dynamics. The results demonstrate that adults adjust their movement decisions according to the risk of breeding failure driven by the hydroperiod, which then affects the waterbody occupancy dynamics.

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Section: Biological Modelmentioning

confidence: 99%

Section: Influence Of the Hydroperiod On The Movement Behaviour Of mentioning

confidence: 99%

Manipulating waterbody hydroperiod affects movement behaviour and occupancy dynamics in an amphibian

et al. 2017

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“…Third, the reduction in adult survival could be partially due to costs related to forced emigration resulting from patch destruction. These costs would be increased in the case of relatively isolated patches or if patch destruction coincides with stressful meteorological conditions (e.g., drought; Cayuela et al., ). All or combinations of these different mechanisms could be simultaneously implicated; it is difficult to determine their relative contribution to the overmortality highlighted in our study.…”

Section: Discussionmentioning

confidence: 99%

Demographic response to patch destruction in a spatially structured amphibian population

Cayuela

Besnard

Quay³

et al. 2018

Journal of Applied Ecology

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Economic activities such as logging and mineral extraction can result in the creation of new anthropogenic habitats that host specific biodiversity, including protected species. However, the legislation in many Western European countries requires the rehabilitation of “damaged” areas following logging and mining operations, which can eliminate these early successional habitats. Conservation managers face a dilemma in these situations, but often lack knowledge about the impacts of environmental rehabilitation on the population dynamics of pioneer species and so are unable to take this into account in their actions. We investigated the demography of a spatially structured population of an endangered amphibian (Bombina variegata) that uses waterbodies created by logging activities as breeding sites. Using capture–recapture (CR) data collected during a 9‐year study period, we examined how the destruction of breeding patches due to environmental rehabilitation affected adult survival and the long‐term population growth rate. For this purpose, we used recently developed capture–recapture multievent models to estimate survival and dispersal rates in the spatially structured population. We then used these estimates to simulate population trajectories and viability depending on differing frequency of breeding patch destruction. The multievent models revealed that dispersal not resulting from patch loss was relatively high and was sex biased. They also highlighted that patch destruction had a negative impact on adult survival. Moreover, simulations showed that the increase in patch destruction frequency had a strong negative influence on the population growth rate, even when the number of patches remained constant over time. This impact was intensified if female fecundity was also affected. Synthesis and applications. Our study quantifies for the first time the detrimental effect of habitat rehabilitation on the population dynamics of an endangered, pioneer species. Our results show that this deleterious impact of patch destruction could be reduced by certain management practices, such as avoiding the systematic rehabilitation of the breeding patches and compensating for patch destruction by creating substitute breeding patches.

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“…To test the effectiveness of MODEL 1, we used capture-recapture data collected on a metapopulation of yellow-bellied toads during a 4-yr period (2012)(2013)(2014)(2015). Individuals (males and females) were identified through their individual pattern of black and yellow mottles on the belly, which were recorded by photographs (see Cayuela et al 2014). Dispersal events occur between these groups of ponds (Cayuela et al 2016a) at both intra-annual and interannual scales; we made a distinction between these two types of dispersal event as they likely rely on different causal factors in amphibians (Deno€ el et al 2018).…”

Section: Model 1: Yellow-bellied Toad Datamentioning

confidence: 99%

“…This metapopulation occupies 84 pond networks spread over a woodland and covering a surface area of 9,600 ha. Interested readers should refer to Cayuela et al 2014Cayuela et al , 2016a for a more detailed description of the studied metapopulation and the sampling design. Dispersal can result either from the drying out of a pond group (i.e., forced dispersal from a site that has become unavailable) or other environmental and social factors (i.e., facultative dispersal from a site that remains available).…”

Section: Model 1: Yellow-bellied Toad Datamentioning

confidence: 99%

Estimating dispersal in spatiotemporally variable environments using multievent capture–recapture modeling

Cayuela

Pradel

Joly

et al. 2018

Ecology

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Dispersal is a key process in ecological and evolutionary dynamics. Spatiotemporal variation in habitat availability and characteristics has been suggested to be one of the main cause involved in dispersal evolution and has a strong influence on metapopulation dynamics. In recent decades, the study of dispersal has led to the development of capture-recapture (CR) models that allow movement between sites to be quantified, while handling imperfect detection. For studies involving numerous recapture sites, Lagrange et al. () proposed a multievent CR model that allows dispersal to be estimated while omitting site identity by distinguishing between individuals that stay and individuals that move. More recently, Cayuela et al. () extended this model to allow survival and dispersal probabilities to differ for the different types of habitat represented by several sites within a study area. Yet in both of these modeling systems, the state of sites is assumed to be static over time, which is not a realistic assumption in dynamic landscapes. For that purpose, we generalized the multievent CR model proposed by Cayuela et al. () to allow the estimation of dispersal, survival and recapture probabilities when a site may appear or disappear over time (MODEL 1) or when the characteristics of a site fluctuate over space and time (MODEL 2). This paper first presents these two new modeling systems, and then provides an illustration of their efficacy and usefulness by applying them to simulated CR data and data collected on two metapopulations of amphibians. MODEL 1 was tested using CR data recorded on a metapopulation of yellow-bellied toads (Bombina variegata). In this first empirical case, we examined whether the drying-out dynamics of ponds and the past dispersal status of an individual might affect dispersal behavior. Our study revealed that the probability of facultative dispersal (i.e., from a pond group that remained available/flooded) fluctuated between years and was higher in individuals that had previously dispersed. MODEL 2 was tested using CR data collected on a metapopulation of great crested newts (Triturus cristatus). In this second empirical example, we investigated whether the density of alpine newts (Ichthyosaura alpestris), a potential competitor, might affect the dispersal and survival of the crested newt. Our study revealed that the departure rate was lower in ponds with a high density of heterospecifics than in ponds with a low density of heterospecifics at both inter-annual and intra-annual scales. Moreover, annual survival was slightly higher in ponds with a high density of heterospecifics. Overall, our findings indicate that these multievent CR models provide a highly flexible means of modeling dispersal in dynamic landscapes.

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To breed or not to breed: past reproductive status and environmental cues drive current breeding decisions in a long-lived amphibian

Cited by 77 publications

References 55 publications

Manipulating waterbody hydroperiod affects movement behaviour and occupancy dynamics in an amphibian

Manipulating waterbody hydroperiod affects movement behaviour and occupancy dynamics in an amphibian

Demographic response to patch destruction in a spatially structured amphibian population

Estimating dispersal in spatiotemporally variable environments using multievent capture–recapture modeling

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