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Research uses heat to predict species most threatened by climate change


Research uses heat to predict species most threatened by climate change

Drosophila melanogaster. Credit: Dr Andrew Weeks Climate change is a threat to all species, but which species will be under the greatest threat? The question is at the centre of research by a Monash University biologist Dr Vanessa Kellermann, who examines heat resistance – or ’thermal history’ – to determine which species will suffer more as a result of climate change.
The latest development in Dr Kellermann’s work was published recently in Proceedings of the Royal Society B.
”Getting accurate predictions of a species’ risk to climate change is no easy task,” Dr Kellermann said.
”One way is to take species from the field and estimate heat resistance and see how close this estimate is to future climate projections,” she said.
The closer a species’ heat tolerance is to maximum temperature of the environment the more at risk a species is to climate change.
However, estimates of heat tolerance might be influenced by the environment a species is collected from.
A species that grows up in a warm environment may have higher heat resistance than a species that grows up in a cold environment and this difference may be due to the environment they experience rather than their genes, explains Dr Kellermann.
The study aimed to determine the extent to which estimates of heat resistance, a frequently used measure for climate change risk, are sensitive to changes in temperature during developmental or changes in temperature as adults.
Examining the model species Drosophila melanogaster (common fruit fly) the researchers found that temperatures experienced during development had a bigger effect on a species’ heat resistance than temperatures experienced as an adult.
”Our study shows that current predictions of climate change risk for different species might be influenced by the environment they are collected in,” Dr Kellermann said.
Explore further:Evolutionary capacity of many fruit fly species will lag behind pace of climate change, researchers say
More information: Vanessa Kellermann et al. How important is thermal history? Evidence for lasting effects of developmental temperature on upper thermal limits in, Proceedings of the Royal Society B: Biological Sciences (2017). DOI: 10.1098/rspb.2017.0447

Journal reference:Proceedings of the Royal Society B
Provided by:Monash University

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