Does heat tolerance actually predict animals' geographic thermal limits?

The Science of The Total Environment, Год журнала: 2024, Номер 917, С. 170165 - 170165

Опубликована: Янв. 21, 2024

The "climate extremes hypothesis" is a major assumption of geographic studies heat tolerance and climatic vulnerability. However, this remains vastly untested across taxa, multiple factors may contribute to uncoupling limits. Our dataset includes 1000 entries data maximum temperatures for each species' known limits (hereafter, Tmax). We gathered information animal including marine fish, terrestrial arthropods, amphibians, non-avian reptiles, birds, mammals. first tested if constrains the Tmax sites where species could be observed. Secondly, we strength such restrictions depends on how high relative tolerance. Thirdly, correlated different estimates among them species. Restrictions are strong birds but often weak or inconsistent reptiles Marine fish describe non-linear relationship that contrasts with groups. Traditional measures in thermal vulnerability studies, like panting upper set point preferred temperatures, do not predict inversely it, respectively. Heat restricts warm edges more strongly reach higher their These emerging patterns underline importance reliable indexes identify at range edges. Besides, tight correlations on-land microhabitats support view types challenges simultaneously shaping ranges' heterogeneous correlation ocean supports thermoregulation generally limited, too. propose new hypotheses understand distribution.

Язык: Английский

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Acclimation capacity to global warming of amphibians and freshwater fishes: Drivers, patterns, and data limitations

Global Change Biology, Год журнала: 2024, Номер 30(5)

Опубликована: Май 1, 2024

Abstract Amphibians and fishes play a central role in shaping the structure function of freshwater environments. These organisms have limited capacity to disperse across different habitats thermal buffer offered by systems is small. Understanding determinants patterns their physiological sensitivity life history is, therefore, imperative predicting impacts climate change systems. Based on systematic literature review including 345 experiments with 998 estimates 96 amphibian (Anura/Caudata) 93 fish species (Teleostei), we conducted quantitative synthesis explore phylogenetic, ontogenetic, biogeographic (thermal adaptation) upper tolerance (CT max ) acclimation (acclimation response ratio, ARR) as well influence methodology used assess these traits using conditional inference tree analysis. We found globally consistent CT ARR, phylogeny (taxa/order), experimental methodology, climatic origin, stage significant traits. The analysis demonstrated that does not primarily depend origin but temperature duration, stage. Higher temperatures longer times led higher values, whereby Anuran larvae revealed than older stages. ARR was more twice amphibians. Differences between stages were significant. In addition phylogenetic differences, also depended ramping rate, adaptation local variability. However, amount data early too small, methodologically inconsistent, phylogenetically unbalanced identify potential cycle bottlenecks We, propose methods improve robustness comparability /ARR stages, which crucial for conservation biodiversity under change.

Язык: Английский

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Lizard thermal physiology drives abundance peaks along climate gradients, but only weakly predicts distributional limits

The American Naturalist, Год журнала: 2025, Номер unknown

Опубликована: Май 8, 2025

Язык: Английский

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The time course of acclimation of critical thermal maxima is modulated by the magnitude of temperature change and thermal daily fluctuations

Journal of Thermal Biology, Год журнала: 2023, Номер 114, С. 103545 - 103545

Опубликована: Май 1, 2023

Язык: Английский

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Novel physiological data needed for progress in global change ecology

Basic and Applied Ecology, Год журнала: 2023, Номер 67, С. 32 - 47

Опубликована: Янв. 26, 2023

Studies examining the underlying causes of distributions species and their future trajectories under climate change have benefitted from accumulation measurements thermal tolerance across tree life. However, gaps in global coverage heat-tolerance data for ectotherms persist on four critical fronts. First, most large-scale analyses treat heat as a fixed trait despite that population-level variation can equal or exceed cross-species variation. Second, terrestrial non-arthropod invertebrates aquatic other than bony fish been poorly sampled, particularly boreal tropical regions, Indian Ocean mesopelagic-deep ocean. Third, study impacts has often neglected interaction environmental temperatures with water availability. And fourth, mechanisms driving dependence oxygen supply-demand remain largely unknown. We contend filling those knowledge requires novel strategies ecophysiological sampling range understudied populations occupy length climatic gradients globally. Such developments are essential comprehensively predicting responses to biomes.

Язык: Английский

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Niche Theory and Species Range Limits along Elevational Gradients: Perspectives and Future Directions

Annual Review of Ecology Evolution and Systematics, Год журнала: 2024, Номер 55(1), С. 449 - 469

Опубликована: Авг. 14, 2024

Despite two centuries of research, the mechanisms underlying formation species’ elevational range limits remain poorly understood. The climatic variability hypothesis highlights role conditions in shaping thermal tolerance and distribution ranges, while species interactions–abiotic stress underscores relative importance biotic factors abiotic along environmental gradients. We emphasize Darwin's perspective on ubiquity interspecific competition across gradients understanding how climate modulates interactions to shape distributions. Niche theory provides a comprehensive framework, combined with empirical explore influence traits, leading context-dependent that constrain In particular, application concept environmentally weighted performance can further elucidate these complex ecological mechanisms. Future research should integrate multiple approaches, including field laboratory manipulative experiments, theoretical modeling, interdisciplinary collaboration, improve our distributions mountain regions inform biodiversity conservation strategies face rapid change.

Язык: Английский

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Systematics of the Dendropsophus leucophyllatus species group (Anura, Hylidae) from the Chocó region of Ecuador, with description of a new species

Evolutionary Systematics, Год журнала: 2025, Номер 9(1), С. 7 - 31

Опубликована: Фев. 21, 2025

The Dendropsophus leucophyllatus group is composed by 19 species distributed from Central America to the Atlantic Forest of Brazil. Only one known Chocó region, D. ebraccatus , which also in America. Previous studies suggested existence two masked under “ ”. only other lowlands Ecuador gryllatus an elusive never included phylogenetic analyses. In present study, we review systematics both based on morphological, genetic, and bioacoustic data. For analyses, sequenced four mitochondrial genes (12S, 16S, COI, ND1, including flanking tRNAs) nuclear (TYR, POMC). Our results indicate that populations ” represent a new species, not most closely related America, but . inhabits tropical rainforest piedmont evergreen forest NW SW Colombia. Populations differ having larger body size presence hourglass-shaped dorsal mark. differs absence clear band eye, well defined spots distinct advertisement call. Both appear be allopatric and, according our time-tree, diverged each during late Pliocene.

Язык: Английский

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Three new species of torrent treefrogs (Anura, Hylidae) of the Hyloscirtus bogotensis group from the eastern Andean slopes and the biogeographic history of the genus

ZooKeys, Год журнала: 2025, Номер 1231, С. 233 - 292

Опубликована: Март 13, 2025

The Hyloscirtus bogotensis group contains 17 species of treefrogs from the tropical Andes and Central America. A taxonomic review Amazonian clades this is presented based on DNA sequences nuclear mitochondrial a preliminary phylogenomic analysis ultraconserved elements, as well morphological, bioacoustic, environmental characters. Additionally, role in diversification genus explored by reconstructing their ancestral basin (Amazon, Pacific, Caribbean). Our integrative indicates existence eight undescribed candidate within group. Three those are described, previously masked H. albopunctulatus , phyllognathus torrenticola . lectotype also designated for Hyla albopunctulata new evidence suggests that neither nor occur Ecuador. species, elbakyanae sp. nov. dispersus maycu differ other members bioacoustics external morphology. most useful diagnostic characters among were advertisement calls. In contrast, skin coloration highly variable intraspecifically and, result, low value. High variation color partly result phenotypic plasticity. biogeographic reconstructions indicate Andean barrier influenced Since early Oligocene, there have been only four colonization events across de Andes, between Pacific Amazon basins. Two occurred more than 14 Mya, when below 3000 m. Species highland larinopygion younger, suggesting recent high montane forests paramo habitats emerged.

Язык: Английский

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Within-reach temperature heterogeneity is limited in a southern Appalachian stream network, southeastern USA

Journal of Hydrology, Год журнала: 2025, Номер unknown, С. 133127 - 133127

Опубликована: Март 1, 2025

Язык: Английский

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High thermal variation in maximum temperatures invert Brett's heat‐invariant rule at fine spatial scales

Ecology, Год журнала: 2025, Номер 106(6)

Опубликована: Июнь 1, 2025

Abstract Discovering how species' thermal limits evolve and vary spatially is crucial for predicting their vulnerability to ongoing environmental warming. Current evidence indicates that heat tolerance less variable than cold among species, presenting a major concern organismal in rapidly warming world. This asymmetry has been supported by large‐scale geographic studies, across latitudinal elevational gradients (known as Brett's heat‐invariant rule). Yet, critical finer spatial scales (e.g., microenvironments) understood. Here, we show minimum temperatures are more maximum at large (across latitude/elevation) but local (within sites), turn guiding asymmetries tolerances. Using measurements from amphibians, insects, reptiles, confirm the invariance of also find tolerances (an inverted rule fine scales). Our results suggest regional‐ or global‐level studies will likely obscure fine‐scale structuring habitats corresponding patterns adaptation. We emphasize inferences based on broadscale variation physiology. For instance, genetic basis physiology may reshuffle phylogenetic vulnerability.

Язык: Английский

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