Changes in temperature tolerance during the development of <i>Xenopus laevis</i> embryos

Nelson, Lennart; Mild, Kjell Hansson

doi:10.1002/jez.1402220114

Cited by 6 publications

(10 citation statements)

References 9 publications

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“…With water temperatures regularly reaching 20 °C, climatic conditions in California are less extreme than in the species’ native range (McCoid & Fritts, ) leading to an almost year‐round reproductive activity with continuous ovulation (McCoid & Fritts, ). It was suggested that low ambient temperatures might hamper reproduction (Nelson et al., ). However, the species was found to reproduce during most of the year in France with a strong peak during the summer months (April to June; Courant et al., in press).…”

Section: Discussionmentioning

confidence: 99%

“…Thermal tolerances were found to range from 14 °C to 32 °C (Casterlin & Reynolds, 1980). However, other authors suggested that X. laevis withstands more extreme thermal conditions (Nelson et al, 1982), and critical thermal limits of 2 °C and 39 °C, respectively, were obtained for the invasive population in France (J. Courant and A. Herrel, pers.…”

Section: Niche Shiftsmentioning

confidence: 99%

“…can be triggered by a period of rainfall, whereas Green (2002) year-round reproductive activity with continuous ovulation (McCoid & Fritts, 1989). It was suggested that low ambient temperatures might hamper reproduction (Nelson et al, 1982). However, the species was found to reproduce during most of the year in France with a strong peak during the summer months (April to June; Courant et al, in press).…”

Section: Niche Shiftsmentioning

confidence: 99%

“…Being a model organism in a broad range of scientific disciplines, a variety of information on environmental constraints on X. laevis is available, including data on climatic factors that determine diurnal and annual activity patterns, reproduction and thermal tolerances (Balinsky, 1969;Casterlin & Reynolds, 1980;Eggert & Fouquet, 2006;McCoid & Fritts, 1989;Miller, 1982;Nelson, Mild, & Lovtrup, 1982;Wilson, James, & Johnston, 2000;Measey, 2016). Hence, comparisons of experimentally quantified properties of its fundamental niche with its realized niches are possible by comparing environmental conditions as observed at species occurrences with physiological and behavioral information obtained from the literature.…”

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confidence: 99%

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Global realized niche divergence in the African clawed frog Xenopus laevis

Rödder

Ihlow

Courant

et al. 2017

Ecology and Evolution

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Although of crucial importance for invasion biology and impact assessments of climate change, it remains widely unknown how species cope with and adapt to environmental conditions beyond their currently realized climatic niches (i.e., those climatic conditions existing populations are exposed to). The African clawed frog Xenopus laevis, native to southern Africa, has established numerous invasive populations on multiple continents making it a pertinent model organism to study environmental niche dynamics. In this study, we assess whether the realized niches of the invasive populations in Europe, South, and North America represent subsets of the species’ realized niche in its native distributional range or if niche shifts are traceable. If shifts are traceable, we ask whether the realized niches of invasive populations still contain signatures of the niche of source populations what could indicate local adaptations. Univariate comparisons among bioclimatic conditions at native and invaded ranges revealed the invasive populations to be nested within the variable range of the native population. However, at the same time, invasive populations are well differentiated in multidimensional niche space as quantified via n‐dimensional hypervolumes. The most deviant invasive population are those from Europe. Our results suggest varying degrees of realized niche shifts, which are mainly driven by temperature related variables. The crosswise projection of the hypervolumes that were trained in invaded ranges revealed the south‐western Cape region as likely area of origin for all invasive populations, which is largely congruent with DNA sequence data and suggests a gradual exploration of novel climate space in invasive populations.

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Section: Discussionmentioning

confidence: 99%

Section: Niche Shiftsmentioning

confidence: 99%

Section: Niche Shiftsmentioning

confidence: 99%

mentioning

confidence: 99%

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Global realized niche divergence in the African clawed frog Xenopus laevis

Rödder

Ihlow

Courant

et al. 2017

Ecology and Evolution

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“…The effect of fever appears to be due to the temperature, rather than infection (Acs et al, 2005). Several hypotheses for why temperature causes developmental defects have been proposed (Nelson et al, 1982, van der Have, 2002, Edwards, 2006, Hosako et al, 2009), but to the best of our knowledge, the contribution of mechanics has not been considered.…”

Section: Sources Of Mechanical Variationmentioning

confidence: 99%

Physics and the canalization of morphogenesis: a grand challenge in organismal biology

Dassow

Davidson

2011

Phys. Biol.

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Morphogenesis takes place in a background of organism-to-organism and environmental variation. Therefore, a fundamental question in the study of morphogenesis is how the mechanical processes of tissue movement and deformation are affected by that variability, and in turn, how the mechanics of the system modulates phenotypic variation. We highlight a few key factors, including environmental temperature, embryo size, and environmental chemistry that might perturb the mechanics of morphogenesis in natural populations. Then we discuss several ways in which mechanics – including feedback from mechanical cues – might influence intra-specific variation in morphogenesis. To understand morphogenesis it will be necessary to consider whole-organism, environment, and evolutionary scales because these larger scales present the challenges that developmental mechanisms have evolved to cope with. Studying the variation organisms express and the variation organisms experience will aid in deciphering the causes of birth defects.

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Ecophysiological models for global invaders: Is Europe a big playground for the African clawed frog?

et al. 2020

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One principle threat prompting the worldwide decline of amphibians is the introduction of nonindigenous amphibians. The African Clawed Frog, Xenopus laevis, is now one of the widest distributed amphibians occurring on four continents with ongoing range expansion including large parts of Europe. Species distribution models (SDMs) are essential tools to predict the invasive risk of these species. Previous efforts have focused on correlative approaches but these can be vulnerable to extrapolation errors when projecting species' distributions in nonnative ranges. Recent developments emphasise more robust process‐based models, which use physiological data like critical thermal limits and performance, or hybrid models using both approaches. Previous correlative SDMs predict different patterns in the potential future distribution of X. laevis in Europe, but it is likely that these models do not assess its full invasive potential. Based on physiological performance trials, we calculate size and temperature‐dependent response surfaces, which are scaled to geographic performance layers matching the critical thermal limits. We then use these ecophysiological performance layers in a standard correlative SDM framework to predict the potential distribution in southern Africa and Europe. Physiological performance traits (standard metabolic rate and endurance time of adult frogs) are the main drivers for the predicted distribution, while the locomotor performance (maximum velocity and distance moved in 200 ms) of adults and tadpoles have low contributions.

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Changes in temperature tolerance during the development of Xenopus laevis embryos

Cited by 6 publications

References 9 publications

Global realized niche divergence in the African clawed frog Xenopus laevis

Global realized niche divergence in the African clawed frog Xenopus laevis

Physics and the canalization of morphogenesis: a grand challenge in organismal biology

Ecophysiological models for global invaders: Is Europe a big playground for the African clawed frog?

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