Thermal constraints on body size depend on the population’s position within the species’ thermal range in temperate songbirds

Dubos, Nicolas; Dehorter, Olivier; Henry, Pierre‐Yves; Viol, Isabelle Le

doi:10.1111/geb.12805

Cited by 14 publications

(13 citation statements)

References 58 publications

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“…This hypothesis can explain the observed differences in body-size changes over time and across space among species and populations. Similar phenomena have frequently been reported in birds [16,17,44] but not in rodents. The hypothesis also suggests that studies should be conducted at higher temporal and spatial resolutions when exploring the general size trends associated with global climate change for many species, and they should include clades of species with similar distribution ranges.…”

Section: Discussionsupporting

confidence: 89%

“…Within species, it also differed between the two dimensions. Generally, these differences have been attributed to either varying thermal tolerance among species and populations or diversity of food resources in different temperature zones [5,17,44]. As discussed above, the different body-length trends in our species have unlikely been caused by changing food availability, but they can be explained by combining the concepts of the thermoneutral zone (TNZ) [45] and thermal tolerance [46] with the magnitude of experienced temperature increase.…”

Section: Discussionmentioning

confidence: 99%

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Distinct body-size responses to warming climate in three rodent species

Sommer

Yang

et al. 2022

Proc. R. Soc. B.

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In mammals, body-size responses to warming climates are diverse, and the mechanisms underlying these different responses have been little investigated. Using temporal and spatial datasets of three rodent species distributed across different climatic zones in China, we investigated temporal and spatial trends of body size (length and mass), identified the critical drivers of these trends, and inferred the potential causes underlying the distinct body-size responses to the critical drivers. We found that body mass of all species remained stable over time and across space. Body length, however, increased in one species over time and in two species across space. Generally, body-length variation was predicted best by minimum ambient temperature. Moreover, in two species, body length changed linearly with temperature differences between ancestral and colonization areas. These distinct temperature–length patterns may jointly be caused by species-specific temperature sensitivities and experienced magnitudes of warming. We hypothesize that species or populations distributed across distinct temperature gradients evolved different intrinsic temperature sensitivities, which affect how their body sizes respond to warming climates. Our results suggest that size trends associated with climate change should be explored at higher temporal and spatial resolutions, and include clades of species with similar distributions.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Distinct body-size responses to warming climate in three rodent species

Sommer

Yang

et al. 2022

Proc. R. Soc. B.

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“…Both gecko species did not establish in regions with arid seasons, presumably because low precipitation limits primary and secondary production and therefore food availability (Dubos et al 2019). Prolonged drought periods are associated with body condition declines, increased mortality, and local extirpation in reptiles (Maxwell et al 2019), conditions which may prevent the establishment of our study species.…”

Section: Discussionmentioning

confidence: 99%

Choice of climate data influences current and future global invasion risks for twoPhelsumageckos

Dubos

Fieldsend

Roesch

et al. 2022

Preprint

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Invasion risks may be influenced either negatively or positively by climate change, depending on the species. These can be predicted with species distribution models, but projections can be strongly affected by input environmental data (climate data source, Global Circulation Models and Shared Socio-economic Pathways SSP). We modelled the distribution of Phelsuma grandis and P. laticauda, two Malagasy reptiles that are spreading globally. We accounted for drivers of spread and establishment using socio-economic factors (e.g., distance from ports) and two climate data sources, i.e., Climatologies at High Resolution for the Earth's and Land Surface Areas (CHELSA) and Worldclim. We further quantified the degree of agreement in invasion risk models that utilised CHELSA and Worldclim data for current and future conditions. Most areas identified as highly exposed to invasion risks were consistently identified (e.g. in Caribbean and Pacific Islands). However, projected risks differed locally. We also found notable differences in quantitative invasion risk (3% difference in suitability scores for P. laticauda and up to 14% for P. grandis) under current conditions. Despite both species native distributions overlap substantially, climate change will drive opposite responses on invasion risks by 2070 (decrease for P. grandis, increase for P. laticauda). Overall, projections of future invasion risks were the most affected by climate data source, followed by SSP. Our results highlight that assessments of current and future invasion risks are sensitive to the climate data source, especially in Islands. We stress the need to account for multiple climatologies when assessing invasion risks.

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“…In such regions, small shifts in climatic conditions may induce important changes in local environmental suitability for endemic-often specialised-species (e.g., Raxworthy et al, 2008). The risk is greater in tropical regions where species live closer to the upper bound of their thermal tolerance (Tewksbury et al, 2008;Şekercioĝlu et al, 2012;Vanderwal et al, 2013;Dubos et al, 2019). Species that are already under threats are at the greatest risk because of a large array of synergistic effects (Şekercioĝlu et al, 2012).…”

Section: Are All Endangered Narrow-ranging Species Doomed To Extinction?mentioning

confidence: 99%

Are narrow-ranging species doomed to extinction? Projected dramatic decline in future climate suitability of two highly threatened species

Dubos

Montfort²,

Grinand³

et al. 2021

Preprint

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Narrow-ranging species are usually omitted from Species distribution models (SDMs) due to statistical constraints, which may be problematic in conservation planning. The recently available high-resolution climate and land use data enable to increase the eligibility of narrow-ranging species for SDMs, provided their distribution is well known. We modelled the distribution of two narrow-ranging species for which the distribution of their occurrence records is assumed to be nearly comprehensive and unbiased (i.e., the Critically Endangered Manapany day gecko Phelsuma inexpectata and the Endangered golden Mantella frog Mantella aurantiaca). We predict a dramatic decline in climate suitability in the whole current distribution area of both species by 2070, potentially leading to a complete extinction even in the most optimistic scenario. We identified the areas with the best climate suitability in the future, but these remain largely suboptimal regarding species climatic niche. The high level of habitat fragmentation suggests that both species likely need to be at least partly translocated. We propose to consider the use of spatially explicit guidelines for translocation and habitat restoration in order to leave the species a chance to adapt and persist. The effect of climate change remains understudied for the extreme majority of rare and highly threatened species. This study suggests that the level of threats of data-poor and narrow-ranging species already identified as threatened may be underestimated, especially in heterogeneous tropical environments. We stress the need to consider the option of implementing proactive actions for threatened narrow-ranging species.

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Thermal constraints on body size depend on the population’s position within the species’ thermal range in temperate songbirds

Cited by 14 publications

References 58 publications

Distinct body-size responses to warming climate in three rodent species

Distinct body-size responses to warming climate in three rodent species

Choice of climate data influences current and future global invasion risks for twoPhelsumageckos

Are narrow-ranging species doomed to extinction? Projected dramatic decline in future climate suitability of two highly threatened species

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