Olivier Lourdais

Olivier Lourdais
French National Centre for Scientific Research | CNRS · Centre d'Etudes Biologiques de Chizé - La Rochelle, UMR 7372

PhD

About

143
Publications
51,522
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Introduction
CNRS Reseacher at the CEBC-CNRS, France. I study how ectotherms face spatial and temporal variations in their environment. The anthropocene imposes unprecedented constraints and species responses will depend on their physiological and behavioral capacities. Reptiles and amphibians are particularly vulnerable and provide excellent models for addressing these effects. My research combines three main axis: (1) Climate adaptations, (2) Parental influences (3) Habitats quality and conservation
Additional affiliations
October 2003 - December 2004
Arizona State University
Position
  • PostDoc Position

Publications

Publications (143)
Article
Full-text available
Aging is the price to pay for acquiring and processing energy through cellular activity and life history productivity. Climate warming can exacerbate the inherent pace of aging, as illustrated by a faster erosion of protective telomere DNA sequences. This biomarker integrates individual pace of life and parental effects through the germline, but wh...
Article
Triazole compounds are among the most widely used fungicides in agroecosystems to protect crops from potential fungal diseases. Triazoles are suspected to have an impact on non‐target species due to their interactions with non‐fungal sterol synthesis and wild birds are likely to be contaminated by triazoles fungicides as many of them live in agroec...
Article
Asp vipers ( Vipera aspis ) and adders ( Vipera berus ) coexist in the Loire-Atlantique department in France where the two species reach their respective range limits. This contact zone is of special interest since hybridization has been recently discovered there. We carried out extensive sampling to further investigate the hybrid status of morphol...
Article
Full-text available
A historic debate in biology is the question of nature vs. nurture. Although it is now known that most traits are a product of both heredity (“nature”) and the environment (“nurture”), these two driving forces of trait development are rarely examined together. In birds, one important aspect of the early developmental environment is egg incubation t...
Article
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Agricultural landscapes cover a large portion of the planet and the intensification of farming is a primary cause of biodiversity loss. Changes in agricultural practices have been particularly marked in Western Europe over the last century. Hedgerow landscapes consist of complex mosaics of pastures, ponds, and hedges connected with forest patches t...
Article
Full-text available
Parental thermoregulation can provide an efficient way to control embryonic temperature and optimize developmental durations and timing. To date, most studies on parental thermal effects have focused on maternal influences, because of the predominant role of females for parental care in most systems. Yet, paternal thermal effects are equally expect...
Article
Heatwaves and droughts are becoming more intense and frequent with climate change. These extreme weather events often occur simultaneously and may alter organismal physiology, yet their combined impacts remain largely unknown. Here, we experimentally investigated physiological responses of a temperate ectotherm, the asp viper (Vipera aspis), to a s...
Book
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Nouvelle édition mise à jour avec les chants d'Anoures. Ce petite guide richement illustré de 115 photos et 70 illustrations, présente les 22 taxons d’Amphibiens et 14 espèces de Reptiles qu’il est possible d’observer dans les bocages de l’ouest et du nord ouest de la France. Il a pour vocation de mieux faire connaître ces espèces à un large publi...
Article
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Vertebrate skin regulates exchanges between the organism and its environment and notably plays a fundamental role in regulating water fluxes. Dynamic changes of skin resistance to water fluxes are expected to occur in species that regularly shift between habitat types especially if these habitats differ in their hydric properties (e.g., terrestrial...
Conference Paper
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Le changement climatique conduit à des modifications graduelles des conditions thermiques et hydriques mais aussi favorise des évènements extrêmes plus intenses et plus fréquents. Alors que les effets des changements de température sur les organismes ectothermes sont classiquement étudiés, les effets combinés des stress thermiques et hydriques extr...
Conference Paper
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Les bocages sont des agroécosystèmes dont l’intérêt écologique est de plus en plus mis en évidence, notamment grâce à leur diversité d’habitats (écocomplexe) et leurs importants réseaux de haies qui jouent le rôle de corridors écologiques pour de nombreuses espèces, dont les reptiles. Ces animaux ectothermes sont particulièrement sensibles à l’agen...
Article
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Recent agricultural intensification threatens global biodiversity with amphibians being one of the most impacted groups. Because of their biphasic life cycle, amphibians are particularly vulnerable to habitat loss and fragmentation that often result in small, isolated populations and loss of genetic diversity. Here, we studied how landscape heterog...
Article
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Human activities have a major impact on habitat connectivity and landscape structure. In this context, it is critical to better understand animal movements and gene flow to develop appropriate conservation and land management measures. It is also important to better understand difference between sexes in space use and spatial scale of dispersal. We...
Article
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Developmental plasticity and thermal acclimation can contribute to adaptive responses to climate change by altering functional traits related to energy and water balance regulation. How plasticity interacts with physiological syndromes through lifetime in long‐lived species is currently unknown. Here, we examined the impacts of long term thermal ac...
Article
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Droughts are becoming more intense and frequent with climate change. These extreme weather events can lead to mass mortality and reproduction failure, and therefore cause population declines. Understanding how the reproductive physiology of organisms is affected by water shortages will help clarify whether females can adjust their reproductive stra...
Article
Motivation The understanding of physiological adaptations, of evolutionary radiations and of ecological responses to global change urges for global, comprehensive databases of the functional traits of extant organisms. The ability to maintain an adequate water balance is a critical functional property influencing the resilience of animal species to...
Article
Many banned persistent organic pollutants (POPs) remain for decades in the aquatic environment and can have harmful effects on long‐lived predators because of their high bioaccumulation and biomagnification potentials. We investigated the occurrence and levels of 18 polychlorinated biphenyls (PCBs) and 16 organochlorine pesticides (OCPs) in Europea...
Article
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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
Parental care is widespread across the animal kingdom. Parental behaviours are beneficial by increasing offspring survival but induce significant costs to the parents. Because parental care is much more represented in females, associated reproductive costs have been largely studied in this sex. While male parental care is likely to involve signific...
Article
One of the greatest current threats to biodiversity is climate change. However, understanding of organismal responses to fluctuations in temperature and water availability is currently lacking, especially during fundamental life-history stages such as reproduction. To further explore how temperature and water availability impact maternal physiology...
Article
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The intensification of human activities is responsible for habitat loss which is the major cause of biodiversity regression. In this context, it becomes critical to consider with more attention highly transformed or artificial habitats that may have a significant value for biodiversity conservation. It is also equally important to evaluate the sign...
Article
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The designation of taxonomic units has important implications for the understanding and conservation of biodiversity. Eurasian vipers are a monophyletic group of viperid snakes (Serpentes, Viperinae), currently comprising four genera (Daboia, Macrovipera, Montivipera and Vipera) and up to 40 species. Taxonomic units have been described using a wide...
Article
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Parent-offspring conflicts are widespread in nature given that resources are often limited. Recent evidence has shown that water can trigger such conflict during pregnancy in viviparous squamate species (lizards and snakes) and thus questions the role of water in the evolution of reproductive modes. Here, we examined the impact of water restriction...
Article
Most amphibians use both aquatic and terrestrial habitats. While the aquatic phase attracted considerable interest, terrestrial habitat use is often less investigated. We studied diurnal refuge selection in the Midwife toad in Western central France. We used a factorial design and tested the effect of refuge type (wood versus rubber boards) and sub...
Article
Whole organism metabolism is an integrative process that determines not only the energy cost of living but also the energy output that is available for behavioral and physiological processes during the life cycle. Developmental challenge is known to affect growth, development of several organs, and several physiological mechanisms (such as HPA resp...
Presentation
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Les phases précoces du développement sont des étapes sensibles de la vie de l’organisme. Elles permettent la mise en place du phénotype et peuvent influencer à long-terme les traits d’histoire de vie. Les soins parentaux prénataux permettent de tamponner en partie les conditions environnementales et donc d’en réduire les impacts négatifs potentiels...
Article
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Abstract The regulation of body temperature (thermoregulation) and of water balance (defined here as hydroregulation) are key processes underlying ecological and evolutionary responses to climate fluctuations in wild animal populations. In terrestrial (or semiterrestrial) ectotherms, thermoregulation and hydroregulation closely interact and combine...
Article
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The evolution of sex determination is complex and yet crucial in our understanding of population stability. In ectotherms, sex determination involves a variety of mechanisms including genetic determination (GSD), environment determination (ESD), but also interactions between the two via sex reversal. In this study, we investigated whether water dep...
Article
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Depuis quarante ans, de nombreux inventaires et suivis ont été réalisés sur la Vipère péliade Vipera berus (Linné, 1758) dans l'ouest de la France. On constate un faible polymorphisme des individus ainsi qu'une grande rareté des spécimens mélaniques. Nous rapportons ici trois observations inédites d'individus fortement mélanisants à mélaniques et c...
Article
Agricultural intensification is responsible for major habitat degradation and is a primary cause of biodiversity loss. Amphibians are currently facing a global decline induced by multiple pressures, including notably habitat degradation and land conversion. In western Europe, traditional farming systems involve a dense hedgerows network with a mosa...
Article
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A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has been fixed in the paper.
Article
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Amphibians are particularly sensitive to landscape fragmentation. Potential barriers between breeding sites can negatively influence the dispersal of individuals and increase genetic structure between populations. In this study, we genotyped 10 microsatellites for 334 marbled newts (Triturus marmoratus) at 11 different locations in Western France....
Article
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Early life stages are particularly vulnerable to environmental perturbations. Embryonic thermal sensitivity may be a driving force in the emergence of prenatal parental care like maternal thermoregulation. Viviparity has emerged on repeated occasions among squamate reptiles and two main evolutionary hypotheses based on maternal thermoregulation hav...
Article
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The use of fat to support the energy needs of reproduction (i.e. capital breeding) has been studied in a diversity of taxa. However, despite reproductive output (i.e. young or eggs) being approximately 70% water, little is known about the availability of internal resources to accommodate the hydric demands of reproduction. Recent research suggests...
Presentation
Full-text available
Présentation lors d'une journée d’échanges techniques organisée par l'Agence Française pour la Biodiversité (AFB) dans le cadre du Centre de ressources Trame verte et bleue et en partenariat avec le ministère de la Transition écologique et solidaire et le ministère de l’Agriculture et de l’Alimentation. Lien web : http://www.trameverteetbleue.fr/vi...
Technical Report
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Le Plan national d’action (PNA) en faveur du Lézard ocellé (Doré & Thirion, 2012) a été décliné au niveau des régions Provence-Alpes-Côte d’Azur et ex-Languedoc-Roussillon. Un Plan Inter Régional d’Actions (PIRA) spécifique à ces deux régions a été élaboré et mis en œuvre de 2013 à 2017 (Legouez & Marchand, 2013). Les résultats présentés ci-après...
Article
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Résumé - La compréhension des effets locaux du changement climatique sur la biodiversité est essentielle pour orienter les politiques de gestion des espaces naturels. Le manque de connaissances au niveau régional en Nouvelle-Aquitaine (sud-ouest de la France) a conduit au développement d’un programme de recherche « les sentinelles du climat » (sent...
Article
We examined the possible interaction between reproductive effort and embryonic stages at oviposition in oviparous form of the lizard Zootoca vivipara. Our results reveal that the percentage of total embryonic development time (%TEDT) reached at oviposition is negatively correlated to clutch size (adjusted to maternal body size). We found no influen...
Article
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The energy cost of self-maintenance is a critical facet of life-history strategies. Clarifying the determinant of interspecific variation in metabolic rate (MR) at rest is important to understand and predict ecological patterns such as species distributions or responses to climatic changes. We examined variation of MR in snakes, a group characteriz...
Article
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Water constraints can mediate evolutionary conflict either among individuals (e.g., parent-offspring conflict, sexual conflict) or within an individual (e.g., cost of reproduction). During pregnancy, water is of particular importance because the female provides all water needed for embryonic development and experiences important maternal shifts in...
Article
High levels of anthropogenic noise produced in urban areas are known to negatively affect wildlife. Although most research has been focused on the disturbances of communication systems, chronic noise exposure can also lead to physiological and behavioural changes that have strong consequences for fitness. For instance, behavioural changes mediated...
Article
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The physiological mechanisms underlying the 'cost of reproduction' remain under debate, though oxidative stress has emerged as a potential candidate. The 'oxidative cost of reproduction' has received considerable attention with regards to food and antioxidant availability, however the limitation of water availability has thus far been neglected. In...
Article
Full-text available
The physiological mechanisms underlying the ‘cost of reproduction’ remain under debate, though oxidative stress has emerged as a potential candidate. The ‘oxidative cost of reproduction’ has received considerable attention with regards to food and antioxidant availability, however the limitation of water availability has thus far been neglected. In...
Article
Full-text available
Western European vipers are well-defined species with parapatric distributions that reflect contrasting thermal niches and climatic adaptations. Contact zones are usually narrow, coincide with steep ecological gradients and are associated with clear habitat segregation. Natural hybridization has been demonstrated between several species but has not...
Article
In Europe, the recent agricultural intensification has strongly homogenised the landscape. This loss in habitat diversity and the use of agrochemicals are considered as major causes of the global erosion of biodiversity. Landscape changes may also favour phenotypic variation with divergences between populations even at a small spatial scale. We inv...
Article
Temperature plays a crucial role for ectotherm performance and thus for fitness. Terrestrial ectotherms, including reptiles, regulate their body temperature mainly by behavioural means. At high altitude, however, thermal constraints make precise thermoregulation costly. The cost-benefit model of lizard thermoregulation predicts that thermally chall...
Article
Migration is an important event in the life cycle of many organisms, but considerable intraspecific variation may occur in its timing and/or destination, resulting in sexual segregation during wintering periods. In this study, we tested the body size hypothesis, or cold tolerance hypothesis, which predicts that body size dimorphism modulates metabo...
Article
Full-text available
Circulating glucocorticoids (GCs) levels may increase as a result of reproductive effort or in response to unpredictable events. However, the GCs secretion can vary with the availability of vital trophic resources such as energy. While water represents another critical resource, the impact of water deprivation on GCs secretion during reproduction h...
Article
Full-text available
Traditional farming landscape in western Europe is made of a complex mosaic of pastures, cultures, ponds and hedgerows connected with woods. Previous observations in the common frog species suggest that lowland populations are closely associated to wood cover and our aim was to test the validity of this assumption. We studied common frog occurrence...
Poster
Full-text available
A major goal in ecology is to understand and predict species responses to environmental variations. Clarifying the proximate factors involved is a crucial step to unravel general ecological patterns such as habitat use or species distribution. In this context, the use of an ecophysiological approach can be particularly relevant. Trophic resource an...
Article
Understanding the impact of postglacial recolonisation on genetic diversity is essential in explaining current patterns of genetic variation. The central-marginal hypothesis (CMH) predicts a reduction in genetic diversity from the core of the distribution to peripheral populations, as well as reduced connectivity between peripheral populations. Whi...