Scaling of thermal tolerance with body mass and genome size in ectotherms: A comparison between water-and air-breathers

Leiva, Félix P.; Calosi, Piero; Verberk, Wilco C. E. P.

doi:10.1101/593293

Cited by 15 publications

(20 citation statements)

References 80 publications

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“…The arrival of a new large‐bodied predator, usually presenting higher dispersal abilities, may inhibit the establishment of smaller prey species shifting upstream with a greater dispersal lag. A new predator could also accelerate the extirpation of prey species from downstream places (e.g., Koel et al., 2019), even if prey species, commonly smaller, should benefit from better warming tolerances (i.e., higher physiological thermal maxima; Leiva, Calosi, & Verberk, 2019). Although there is extensive literature on the negative impacts of introduced predator fish on native prey, empirical information from tropical regions is scarce.…”

Section: Discussionmentioning

confidence: 99%

The combined effects of climate change and river fragmentation on the distribution of Andean Amazon fishes

Herrera‐R

Oberdorff

Anderson

et al. 2020

Global Change Biology

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Upstream range shifts of freshwater fishes have been documented in recent years due to ongoing climate change. River fragmentation by dams, presenting physical barriers, can limit the climatically induced spatial redistribution of fishes. Andean freshwater ecosystems in the Neotropical region are expected to be highly affected by these future disturbances. However, proper evaluations are still missing. Combining species distribution models and functional traits of Andean Amazon fishes, coupled with dam locations and climatic projections (2070s), we (a) evaluated the potential impacts of future climate on species ranges, (b) investigated the combined impact of river fragmentation and climate change and (c) tested the relationships between these impacts and species functional traits. Results show that climate change will induce range contraction for most of the Andean Amazon fish species, particularly those inhabiting highlands. Dams are not predicted to greatly limit future range shifts for most species (i.e., the Barrier effect). However, some of these barriers should prevent upstream shifts for a considerable number of species, reducing future potential diversity in some basins. River fragmentation is predicted to act jointly with climate change in promoting a considerable decrease in the probability of species to persist in the long‐term because of splitting species ranges in smaller fragments (i.e., the Isolation effect). Benthic and fast‐flowing water adapted species with hydrodynamic bodies are significantly associated with severe range contractions from climate change.

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Section: Discussionmentioning

confidence: 99%

The combined effects of climate change and river fragmentation on the distribution of Andean Amazon fishes

Herrera‐R

Oberdorff

Anderson

et al. 2020

Global Change Biology

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show abstract

“…If mortality increases with warming especially in larger individuals as has been found for Daphnia magna (Bruijning, ten Berge, & Jongejans, 2018), it could be beneficial to mature at a smaller size. Leiva, Calosi, & Verberk (2019) also found survival of heat stress to be dependent on body size.…”

Section: Why Are Negative T–s Responses So Prevalent?mentioning

confidence: 93%

Shrinking body sizes in response to warming: explanations for the temperature–size rule with special emphasis on the role of oxygen

et al. 2020

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Body size is central to ecology at levels ranging from organismal fecundity to the functioning of communities and ecosystems. Understanding temperature‐induced variations in body size is therefore of fundamental and applied interest, yet thermal responses of body size remain poorly understood. Temperature–size (T–S) responses tend to be negative (e.g. smaller body size at maturity when reared under warmer conditions), which has been termed the temperature–size rule (TSR). Explanations emphasize either physiological mechanisms (e.g. limitation of oxygen or other resources and temperature‐dependent resource allocation) or the adaptive value of either a large body size (e.g. to increase fecundity) or a short development time (e.g. in response to increased mortality in warm conditions). Oxygen limitation could act as a proximate factor, but we suggest it more likely constitutes a selective pressure to reduce body size in the warm: risks of oxygen limitation will be reduced as a consequence of evolution eliminating genotypes more prone to oxygen limitation. Thus, T–S responses can be explained by the ‘Ghost of Oxygen‐limitation Past’, whereby the resulting (evolved) T–S responses safeguard sufficient oxygen provisioning under warmer conditions, reflecting the balance between oxygen supply and demands experienced by ancestors. T–S responses vary considerably across species, but some of this variation is predictable. Body‐size reductions with warming are stronger in aquatic taxa than in terrestrial taxa. We discuss whether larger aquatic taxa may especially face greater risks of oxygen limitation as they grow, which may be manifested at the cellular level, the level of the gills and the whole‐organism level. In contrast to aquatic species, terrestrial ectotherms may be less prone to oxygen limitation and prioritize early maturity over large size, likely because overwintering is more challenging, with concomitant stronger end‐of season time constraints. Mechanisms related to time constraints and oxygen limitation are not mutually exclusive explanations for the TSR. Rather, these and other mechanisms may operate in tandem. But their relative importance may vary depending on the ecology and physiology of the species in question, explaining not only the general tendency of negative T–S responses but also variation in T–S responses among animals differing in mode of respiration (e.g. water breathers versus air breathers), genome size, voltinism and thermally associated behaviour (e.g. heliotherms).

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“…For this analysis we used Pagel’s lambda (λ) (Pagel, 1994) as a quantitative measure of this relationship. The Pagel’s λ has been shown to be a very robust indicator of a correlation between ecological and evolutionary processes even for incompletely resolved phylogenies (Molina-Venegas and Rodriguez, 2017; Leiva et al ., 2019). We based this analysis on the phylogeny published by Weaver et al .…”

Section: Methodsmentioning

confidence: 99%

Elevational gradients do not affect thermal tolerance at local scale in populations of livebearing fishes of the genusLimia(Teleostei, Poeciliidae)

Rodríguez-Silva

Schlupp

2020

Preprint

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One of the main assumptions of Janzen’s (1976) mountain passes hypothesis is that due the low overlap in temperature regimes between low and high elevations in the tropics, organisms living in high-altitude evolve narrow tolerance for colder temperatures while low-altitude species develop narrow tolerance for warmer temperatures. Some studies have questioned the generality of the assumptions and predictions of this hypothesis suggesting that other factors different to temperature gradients between low and high elevations may explain altitudinal distribution of species in the tropics. We assessed variation in tolerance to extreme temperatures (measured as critical thermal minimum (CTmin) and maximum (CTmax)) and also compared thermal breadth for populations of eight species of livebearing fishes of the genus Limia occurring in three Caribbean islands and that occupy different altitudinal distribution. Our results showed that species analyzed had significant differences in thermal limits and ranges. Generally, species distributed in high and low elevations did not differ in thermal limits and showed a wider range of thermal tolerance. However, species living in mid-elevations had narrower range of temperature tolerance. We found no significant effect of phylogeny on CTmin, CTmax and thermal ranges among species. This study did not provide evidence supporting Janzen’s hypothesis at a local scale since thermal tolerance and altitudinal distribution of Limia species were not related to temperature gradients expected in nature. Phylogeny also did not explain the patterns we observed. We suggest that biotic factors such as species interactions, diet specializations, and others should be taken into account when interpreting current distribution patterns of Limia species.

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Scaling of thermal tolerance with body mass and genome size in ectotherms: A comparison between water-and air-breathers

Cited by 15 publications

References 80 publications

The combined effects of climate change and river fragmentation on the distribution of Andean Amazon fishes

The combined effects of climate change and river fragmentation on the distribution of Andean Amazon fishes

Shrinking body sizes in response to warming: explanations for the temperature–size rule with special emphasis on the role of oxygen

Elevational gradients do not affect thermal tolerance at local scale in populations of livebearing fishes of the genusLimia(Teleostei, Poeciliidae)

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