Olivier Calvez

Olivier Calvez
Station d’Ecologie Expérimentale à Moulis | ECOEX

Master of Science

About

39
Publications
10,461
Reads
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422
Citations
Education
September 2001 - October 2006
Paul Sabatier University - Toulouse III
Field of study
  • Ecologie gestion de la biodiversité

Publications

Publications (39)
Article
Global warming impacts biodiversity worldwide, leading to species' adaptation, migration, or extinction. The population's persistence depends on the maintenance of essential activities, which is notably driven by phenotypic adaptation to local environments. Metabolic rate – that increases with temperature in ectotherms - is a key physiological prox...
Article
Full-text available
Published by the British Herpetological Society Individual recognition of animal species is a prerequisite for capture-mark-recapture (CMR) studies. For amphibians, photo-identification of body pattern is a non-invasive and less expensive alternative than classical marking methods (e.g. passive integrated transponder). However, photo-identification...
Article
Full-text available
Aim: Determining whether altitudinal shifts in species distributions leave molecular footprints on wild populations along their range margins from rear to leading edge. Location: South-west France. Methods: We compared the demographic and genetic variation in 42 wild populations of the Western oviparous subclade B2 of a cold adapted lizard (Zooto...
Article
In order to advance understanding of the current infection status related to the presence of Batrachochytrium spp. in different populations, we tested for the presence/absence (qualitative analysis) of Bd and Bsal in 13 monitored populations and measured the Bd infection loads (quantitative analysis) of 16 populations of the Pyrenean Brook Newt in...
Article
Climate change is generating range shifts in many organisms, notably along the altitudinal gradient. However, moving up in altitude exposes organisms to lower oxygen availability, which may negatively affect development and fitness, especially at high temperatures. To test this possibility in a potentially upward-colonizing species, we artificially...
Article
Climate change is generating range shifts in many organisms, notably along the altitudinal gradient. However, moving up in altitude exposes organisms to lower oxygen availability, which may negatively affect development and fitness, especially at high temperatures. To test this possibility in a potentially upward-colonizing species, we artificially...
Article
Full-text available
According to theories on cave adaptation, cave organisms are expected to develop a lower metabolic rate compared to surface organisms as an adaptation to food scarcity in the subterranean environments. To test this hypothesis, we compared the oxygen consumption rates of the surface and subterranean populations of a surface-dwelling species, the new...
Article
Full-text available
Climate change is generating range shifts in many organisms, notably along the elevational gradient in mountainous environments. However, moving up in elevation exposes organisms to lower oxygen availability, which may reduce the successful reproduction and development of oviparous organisms. To test this possibility in an upward‐colonizing species...
Article
Full-text available
Historical factors (colonization scenarios, demographic oscillations) and contemporary processes (population connectivity, current population size) largely contribute to shaping species’ present‐day genetic diversity and structure. In this study, we use a combination of mitochondrial and nuclear DNA markers to understand the role of Quaternary clim...
Article
Full-text available
Nineteen polymorphic microsatellite loci were identified and developed for Natrix maura. Polymorphism was assessed for 120 individuals sampled across four sampling sites from the French Pyrenees Mountains. The number of alleles per locus ranged from 3 to 15, and expected heterozygosity per locus ranged from 0.227 to 0.863. We tested for deviation f...
Article
Phenotypic variation along environmental gradients—particularly in body size—occurs in a variety of species. Larger-bodied individuals are usually found in colder climates, as predicted by Bergmann's rule. In ectotherms, this pattern remains controversial. Among thermoconformers, smaller body sizes are expected in colder climates because these spec...
Article
Full-text available
Background Inter-patch movements may lead to genetic mixing, decreasing both inbreeding and population extinction risks, and is hence a crucial aspect of amphibian meta-population dynamics. Traveling through heterogeneous landscapes might be particularly risky for amphibians. Understanding how these species perceive their environment and how they m...
Conference Paper
Full-text available
Testing anesthesia with a mixture of lidocaine-prilocaine, topic on the skin of pyrenean newts (Calotriton aasper)
Conference Paper
Full-text available
Detection and monitoring of Batrachochytrium dendrobatidis in the Pyrenean brook salamander (Calotriton asper). 13 populations were sampled. Two were positive but assymptomatic.
Article
When, how often and for how long organisms mate can have strong consequences for individual fitness and are crucial aspects of evolutionary ecology. Such determinants are likely to be of even greater importance in monandrous species and species with short adult life stages. Previous work suggests that mobility, a key dispersal-related trait, may af...
Article
Full-text available
Abstract. Individual marking has become essential for studying population dynamics and ecological requirements.However, marking small-bodied species such as amphibians is becoming a challenge in the last decades. Amphibiansurveys may require to mark manually individuals, using toe clipping, polymers and pigments, or passive integratedtransponders (...
Article
Full-text available
The maintenance of gene flow and colonization of new areas are influenced by an organism's movements in the landscape. Movement favors genetic mixing and limits inbreeding risk, hence decreasing the risk of extinction. Movement is a multifactorial process, however, and might be influenced by both individual traits and environmental factors. Studyin...
Poster
Full-text available
Presentation of Interreg POCTEFA ECTOPYR project
Article
Full-text available
The existence of dispersal syndromes contrasting disperser from resident phenotypes within populations has been intensively documented across taxa. However, how such suites of phenotypic traits emerge and are maintained is largely unknown, although deciphering the processes shaping the evolution of dispersal phenotypes is a key in ecology and evolu...
Article
Full-text available
Habitat fragmentation is one of the main drivers of global amphibian decline. Anthropogenic landscape elements can act as barriers, hindering the dispersal that is essential for maintaining gene flow between populations. Dispersal ability can be influenced by locomotor performance, which in turn can depend on morphological traits, such as hindlimb...
Article
Full-text available
Amphibians generally have low dispersal abilities and are often habitat specialised, which makes them particularly sensitive to landscape changes, such as habitat destruction and fragmentation. Because they depend on wetlands for breeding, many conservation studies focus on aquatic habitat degradation and destruction. Additionally, few studies show...
Article
Full-text available
The Pyrenees are increasingly affected by climate change. In this context, human societies acrossthe borders must adapt to the changes. ECTOPYR offers a novel and ambitious strategy in thisregard; that is to use a panel of 8 ectotherm organisms (including Zootoca vivipara , Natrix maura , Calotriton asper and the lizards of genus Iberolacerta ) as...
Article
Dispersal, i.e. movements potentially leading to gene flow, is central in evolutionary ecology. Many factors can trigger dispersal, all linked to the social and/or the environmental context. Moreover, it is now widely demonstrated that phenotypes with contrasted dispersal abilities coexist within populations of a same species. The current challenge...
Article
Full-text available
In the current context of climate change and landscape fragmentation, efficient conservation strategies require the explicit consideration of life history traits. This is particularly true for amphibians, which are highly threatened worldwide, composed by more than 7400 species, which is constitute one of the most species-rich vertebrate groups. Th...
Data
Database for life history traits for European amphibians
Data
References cited in the database for life-history traits for European amphibians
Article
Full-text available
Amphibians are one of the most threatened groups of vertebrates in the world and are currently facing major declines due to habitat loss, emerging infectious diseases, and climate change, leading many species to extinction (Stuart et al. 2004). To face this amphibian extinction crisis, there is an urgent need to gather data on the demography and ec...
Article
Full-text available
Flight direction is a major component of animal's migratory success. However, few studies focused on variation in flight direction both between and within individuals, which is likely to be correlated with other traits implied in migration processes. We report patterns of intra- and inter-individual variation in flight direction in the large white...
Article
Sex-biased dispersal, that is, the difference in dispersal between males and females, is thought to be the consequence of any divergent evolutionary responses between sexes. In anisogamous species, asymmetry in parental investment may lead to sexual conflict, which entails male–male competition (for sexual partner access), female–female competition...
Article
Full-text available
Dispersal of organisms generates gene flow between populations. Identifying factors that influence dispersal will help predict how species will cope with rapid environmental change. We developed an innovative infrastructure, the Metatron, composed of 48 interconnected patches, designed for the study of terrestrial organism movement as a model for d...
Article
Full-text available
Garzón’s Sand lizard Lacerta agilis garzoni is a subalpine subspecies, endemic of the eastern part of Pyrenees, completely isolated from the rest of the species’ range. It is only known with certainty from the Mediterranean catchment basin of the mountain range, within an area with a particular climatic influence – i.e. continental peri-mediterrane...
Poster
Full-text available
Garzón’s Sand lizard Lacerta agilis garzoni is a subalpine subspecies, endemic of the eastern part of Pyrenees, completely isolated from the rest of the species’ range. It is only known with certainty from the Mediterranean catchment basin of the mountain range, within an area with a particular climatic influence – i.e. continental peri-mediterrane...

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Projects

Projects (3)
Project
Follow the project on twitter : https://twitter.com/ectopyr This Phd project take part in the project POCTEFA ECTOPYR who will generate distribution maps using climatic, topographic and biological data on ectotherm organisms to (1) evaluate the response of species face to climate change, (2) describe the climate variability in the long-term at the Pyrenean mountain scale and (3) generate tools from modelling to predict the effects of climate change on species.
Project
The project POCTEFA ECTOPYR will generate distribution maps using climatic, topographic and biological data on ectotherm organisms to (1) evaluate the response of species face to climate change, (2) describe the climate variability in the long-term at the Pyrenean mountain scale and (3) generate tools from modelling to predict the effects of climate change on species.
Project
Research about effects of global warming in distribution, diseases and behavior of lizards, snakes and amphibians of Pirinees Mountains.