Evolutionary potential of upper thermal tolerance: biogeographic patterns and expectations under climate change

2016 ◽  
Vol 1389 (1) ◽  
pp. 5-19 ◽  
Author(s):  
Sarah E. Diamond
Keyword(s):  
Climate Change ◽  
Thermal Tolerance ◽  
Evolutionary Potential ◽  
Biogeographic Patterns ◽  
Upper Thermal Tolerance

scholarly journals Intraspecific variation in thermal tolerance differs between tropical and temperate fishes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. J. H. Nati ◽  
M. B. S. Svendsen ◽  
S. Marras ◽  
S. S. Killen ◽  
J. F. Steffensen ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Intraspecific Variation ◽  
Fish Species ◽  
Thermal Tolerance ◽  
Evolutionary History ◽  
Ecological Impacts ◽  
Temperate Species ◽  
Tropical Species ◽  
Upper Thermal Tolerance

AbstractHow ectothermic animals will cope with global warming is a critical determinant of the ecological impacts of climate change. There has been extensive study of upper thermal tolerance limits among fish species but how intraspecific variation in tolerance may be affected by habitat characteristics and evolutionary history has not been considered. Intraspecific variation is a primary determinant of species vulnerability to climate change, with implications for global patterns of impacts of ongoing warming. Using published critical thermal maximum (CTmax) data on 203 fish species, we found that intraspecific variation in upper thermal tolerance varies according to a species’ latitude and evolutionary history. Overall, tropical species show a lower intraspecific variation in thermal tolerance than temperate species. Notably, freshwater tropical species have a lower variation in tolerance than freshwater temperate species, which implies increased vulnerability to impacts of thermal stress. The extent of variation in CTmax among fish species has a strong phylogenetic signal, which may indicate a constraint on evolvability to rising temperatures in tropical fishes. That is, in addition to living closer to their upper thermal limits, tropical species may have higher sensitivity and lower adaptability to global warming compared to temperate counterparts. This is evidence that freshwater tropical fish communities, worldwide, are especially vulnerable to ongoing climate change.

scholarly journals Thermal tolerance, acclimatory capacity and vulnerability to global climate change

2007 ◽  
Vol 4 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Piero Calosi ◽  
David T Bilton ◽  
John I Spicer
Keyword(s):  
Climate Change ◽  
At Risk ◽  
Thermal Tolerance ◽  
Global Climate ◽  
Marine Animals ◽  
Vulnerability To Climate Change ◽  
Diving Beetles ◽  
Mountain Systems ◽  
Future Warming ◽  
Upper Thermal Tolerance

Despite evidence that organismal distributions are shifting in response to recent climatic warming, we have little information on direct links between species' physiology and vulnerability to climate change. We demonstrate a positive relationship between upper thermal tolerance and its acclimatory ability in a well-defined clade of closely related European diving beetles. We predict that species with the lowest tolerance to high temperatures will be most at risk from the adverse effects of future warming, since they have both low absolute thermal tolerance and poor acclimatory ability. Upper thermal tolerance is also positively related to species' geographical range size, meaning that species most at risk are already the most geographically restricted ones, being endemic to Mediterranean mountain systems. Our findings on the relationship between tolerance and acclimatory ability contrast with results from marine animals, suggesting that generalizations regarding thermal tolerance and responses to future rapid climate change may be premature.

scholarly journals Thermal ecology of the federally endangered blunt-nosed leopard lizard (Gambelia sila)

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Kathleen N Ivey ◽  
Margaret Cornwall ◽  
Hayley Crowell ◽  
Nargol Ghazian ◽  
Emmeleia Nix ◽  
...  
Keyword(s):  
Climate Change ◽  
Endangered Species ◽  
Thermal Tolerance ◽  
Microhabitat Use ◽  
Thermal Ecology ◽  
Body Temperatures ◽  
Ambient Temperatures ◽  
Open Habitat ◽  
Kangaroo Rat ◽  
Upper Thermal Tolerance

Abstract Recognizing how climate change will impact populations can aid in making decisions about approaches for conservation of endangered species. The blunt-nosed leopard lizard (Gambelia sila) is a federally endangered species that, despite protection, remains in extremely arid, hot areas and may be at risk of extirpation due to climate change. We collected data on the field-active body temperatures, preferred body temperatures and upper thermal tolerance of G. sila. We then described available thermal habitat using biophysical models, which allowed us to (i) describe patterns in lizard body temperatures, microhabitat temperatures and lizard microhabitat use; (ii) quantify the lizards’ thermoregulatory accuracy; (iii) calculate the number of hours they are currently thermally restricted in microhabitat use; (iv) project how the number of restricted hours will change in the future as ambient temperatures rise; and (v) assess the importance of giant kangaroo rat burrows and shade-providing shrubs in the current and projected future thermal ecology of G. sila. Lizards maintained fairly consistent daytime body temperatures over the course of the active season, and use of burrows and shrubs increased as the season progressed and ambient temperatures rose. During the hottest part of the year, lizards shuttled among kangaroo rat burrows, shrubs, and open habitat to maintain body temperatures below their upper thermal tolerance, but, occasionally, higher than their preferred body temperature range. Lizards are restricted from staying in the open habitat for 75% of daylight hours and are forced to seek refuge under shrubs or burrows to avoid surpassing their upper thermal threshold. After applying climatic projections of 1 and 2°C increases to 2018 ambient temperatures, G. sila will lose additional hours of activity time that could compound stressors faced by this population, potentially leading to extirpation.

scholarly journals Low potential for evolutionary rescue from climate change in a tropical fish

2020 ◽  
Vol 117 (52) ◽  
pp. 33365-33372 ◽  
Author(s):  
Rachael Morgan ◽  
Mette H. Finnøen ◽  
Henrik Jensen ◽  
Christophe Pélabon ◽  
Fredrik Jutfelt
Keyword(s):  
Climate Change ◽  
Danio Rerio ◽  
Thermal Tolerance ◽  
Heat Waves ◽  
Tropical Fish ◽  
Selected Lines ◽  
Thermal Limits ◽  
Evolutionary Rescue ◽  
Hard Limit ◽  
Upper Thermal Tolerance

Climate change is increasing global temperatures and intensifying the frequency and severity of extreme heat waves. How organisms will cope with these changes depends on their inherent thermal tolerance, acclimation capacity, and ability for evolutionary adaptation. Yet, the potential for adaptation of upper thermal tolerance in vertebrates is largely unknown. We artificially selected offspring from wild-caught zebrafish (Danio rerio) to increase (Up-selected) or decrease (Down-selected) upper thermal tolerance over six generations. Selection to increase upper thermal tolerance was also performed on warm-acclimated fish to test whether plasticity in the form of inducible warm tolerance also evolved. Upper thermal tolerance responded to selection in the predicted directions. However, compared to the control lines, the response was stronger in the Down-selected than in the Up-selected lines in which evolution toward higher upper thermal tolerance was slow (0.04 ± 0.008 °C per generation). Furthermore, the scope for plasticity resulting from warm acclimation decreased in the Up-selected lines. These results suggest the existence of a hard limit in upper thermal tolerance. Considering the rate at which global temperatures are increasing, the observed rates of adaptation and the possible hard limit in upper thermal tolerance suggest a low potential for evolutionary rescue in tropical fish living at the edge of their thermal limits.

scholarly journals Intraspecific variation in thermal tolerance differs between tropical and temperate fishes

2020 ◽  
Author(s):  
J.J.H. Nati ◽  
M.B.S. Svendsen ◽  
S. Marras ◽  
S.S. Killen ◽  
J.F. Steffensen ◽  
...  
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Intraspecific Variation ◽  
Fish Species ◽  
Thermal Tolerance ◽  
Evolutionary History ◽  
Ecological Impacts ◽  
Tropical Fish ◽  
Tropical Species ◽  
Upper Thermal Tolerance

AbstractHow ectothermic animals will cope with global warming, especially more frequent and intense heatwaves, is a critical determinant of the ecological impacts of climate change. There has been extensive study of upper thermal tolerance limits among fish species but how intraspecific variation in tolerance may be affected by habitat characteristics and evolutionary history has not been considered. Intraspecific variation is a primary determinant of species vulnerability to climate change, with implications for global patterns of impacts of ongoing warming. Using published critical thermal maximum (CTmax) data on 203 marine and freshwater fish species, we found that intraspecific vsariation in upper thermal tolerance varies according to a species’ latitude and evolutionary history. Notably, freshwater tropical species have lower variation in tolerance than temperate species in the northern hemisphere, which implies increased vulnerability to impacts of thermal stress. The extent of variation in CTmax among fish species has a strong phylogenetic signal, which may indicate a constraint on evolvability to rising temperatures in tropical fishes. That is, in addition to living closer to their upper thermal limits, tropical species may have higher sensitivity and lower adaptability to global warming compared to temperate counterparts. This is evidence that tropical fish communities, worldwide, are especially vulnerable to ongoing climate change.

scholarly journals Variation in upper thermal tolerance among 19 species from temperate wetlands

2021 ◽  
Vol 96 ◽  
pp. 102856
Author(s):  
Marco Katzenberger ◽  
Helder Duarte ◽  
Rick Relyea ◽  
Juan Francisco Beltrán ◽  
Miguel Tejedo
Keyword(s):  
Thermal Tolerance ◽  
Temperate Wetlands ◽  
Upper Thermal Tolerance
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