20 research outputs found

    Effect of temperature treatment on survival, body growth, body condition, and female reproduction the following year in yearling and adults.

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    <p>NOTE: Statistics of Likelihood Ratio test compare two models, one with temperature treatment and one simpler model without temperature treatment. Generalized linear mixed models with logit links are used for binomial factors such as survival and gravidity, other variables are modeled with linear mixed models except for clutch size, which is modeled with a Poisson distribution. We provide estimate and standard error of the fixed effects included in the model (temperature treatment, age, and sex). Following Nakagawa and Schielzeth (2013), we also provide marginal (R²m, effect of the fixed effects) and conditional (R²c, effect of the fixed and random effects) R² for our best models, as well as the proportion change in variance (PCV) for the random effects.</p><p>Effect of temperature treatment on survival, body growth, body condition, and female reproduction the following year in yearling and adults.</p

    Potential risk from climate change for common lizard populations across Europe inferred from current maximum temperatures experienced by these populations.

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    <p>Colors represent “risk profiles” of the populations, from A: imminent risk (purple) to F: low risk (green), see <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1002281#pbio.1002281.s016" target="_blank">S4 Text</a>, <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1002281#pbio.1002281.s011" target="_blank">S6 Table</a>. Populations in risk levels from A to C (purple, red and dark orange) will be threatened by a 2°C increase in temperatures. Populations in risk level D (light orange) will be threatened by a 3°C temperature increase, and risk level E (yellow) will be threatened by a 4°C temperature increase.</p

    Supplementary materials from The functional syndrome: linking individual trait variability to ecosystem functioning

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    Phenotypic variability is increasingly assessed through functional response and effect traits, which provide a mechanistic framework for investigating how an organism responds to varying ecological factors and how these responses affect ecosystem functioning. Covariation between response and effect traits has been poorly examined at the intraspecific level, thus hampering progress in understanding how phenotypic variability alters the role of organisms in ecosystems. Using a multi-trait approach and a nine-month longitudinal monitoring of individual red-swamp crayfish (<i>Procambarus clarkii</i>), we demonstrated that most of the measured response and effect traits were partially stable during the ontogeny of individuals. Suites of response and effect traits were associated with a response syndrome and an effect syndrome, respectively, which were correlated to form a functional syndrome. Using a bioenergetic model, we predicted that differences in the response syndrome composition of hypothetical populations had important ecological effects on a key ecosystem process (i.e. whole-lake litter decomposition) to a level similar to those induced by doubling population size. Demonstrating the existence of a functional syndrome is likely to improve our understanding of the ecological impacts of phenotypic variation among individuals in wild populations across levels of biological organization, and the linkage between ecosystem and evolutionary ecology

    The Metatron.

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    <p><b>A</b>: Aerial view of the structure. On the right, top shutters are closed on 17 enclosures. Credits: Quentin Bénard. <b>B</b>: Close view of the structure. On the bottom left, an enclosure with open shutters. On the top right, an enclosure with closed shutters. <b>C</b>: Inside view of one enclosure. <b>D</b>: Entrance of the two half-corridors of one enclosure. <b>E</b>: Pole containing the sensors recording temperature, humidity, and illuminance inside of the enclosure as well as the sprinkler system, protected with plastic and labeled with the patch identification number. <b>F</b>: Pitfall trap at the end of one corridor. <b>G</b>: One of the two ponds set in each enclosure. <b>H</b> and <b>I</b>: Rock and logs allowing for lizard thermoregulation, set in each corner of the enclosures.</p
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