Evolution of thermal tolerance in multifarious environments

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Evolution of thermal tolerance in multifarious environments. / Cuenca Cambronero, Maria; Beasley , Jordan ; Kissane, Stephen; Orsini, Luisa.

In: Molecular Ecology, Vol. 27, No. 22, 25.11.2018, p. 4529-4541.

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Cuenca Cambronero, Maria ; Beasley , Jordan ; Kissane, Stephen ; Orsini, Luisa. / Evolution of thermal tolerance in multifarious environments. In: Molecular Ecology. 2018 ; Vol. 27, No. 22. pp. 4529-4541.

Bibtex

@article{d1f9f339183941bcaa9f2c14945f8f47,
title = "Evolution of thermal tolerance in multifarious environments",
abstract = "Species extinction rates are many times greater than the direst predictions made two decades ago by environmentalists, largely because of human impact. Major concerns are associated with the predicted higher recurrence and severity of extreme events, such as heat waves. Although tolerance to these extreme events is instrumental to species survival, little is known whether and how it evolves in natural populations, and to what extent it is affected by other environmental stressors. Here, we study physiological and molecular mechanisms of thermal tolerance over evolutionary times in multifarious environments. Using the practice of {\textquoteleft}resurrection ecology{\textquoteright} on the keystone grazer Daphnia magna, we quantified genetic and plastic differences in physiological and molecular traits linked to thermal tolerance in historical and modern genotypes of the same population. This population experienced an increase in average temperature and occurrence of heat waves, in addition to dramatic changes in water chemistry, over five decades. On genotypes resurrected across the five decades, we measured plastic and genetic differences in CTmax, body size, Hb content and differential expression of four heat shock proteins after exposure to temperature as single stress and in combination with food levels and insecticide loads. We observed evolution of the critical thermal maximum and plastic response in body size, HSP expression and Hb content over time in a warming only scenario. Molecular and physiological responses to extreme temperature in multifarious environments were not predictable from the response to warming alone. Underestimating the effect of multiple stressors on thermal tolerance can lead to wrong estimates of species evolvability and persistence.",
keywords = "heat shock proteins, haemoglobin, global change, Daphnia magna, CTmax, body size",
author = "{Cuenca Cambronero}, Maria and Jordan Beasley and Stephen Kissane and Luisa Orsini",
year = "2018",
month = nov,
day = "25",
doi = "10.1111/mec.14890",
language = "English",
volume = "27",
pages = "4529--4541",
journal = "Molecular Ecology",
issn = "0962-1083",
publisher = "Wiley",
number = "22",

}

RIS

TY - JOUR

T1 - Evolution of thermal tolerance in multifarious environments

AU - Cuenca Cambronero, Maria

AU - Beasley , Jordan

AU - Kissane, Stephen

AU - Orsini, Luisa

PY - 2018/11/25

Y1 - 2018/11/25

N2 - Species extinction rates are many times greater than the direst predictions made two decades ago by environmentalists, largely because of human impact. Major concerns are associated with the predicted higher recurrence and severity of extreme events, such as heat waves. Although tolerance to these extreme events is instrumental to species survival, little is known whether and how it evolves in natural populations, and to what extent it is affected by other environmental stressors. Here, we study physiological and molecular mechanisms of thermal tolerance over evolutionary times in multifarious environments. Using the practice of ‘resurrection ecology’ on the keystone grazer Daphnia magna, we quantified genetic and plastic differences in physiological and molecular traits linked to thermal tolerance in historical and modern genotypes of the same population. This population experienced an increase in average temperature and occurrence of heat waves, in addition to dramatic changes in water chemistry, over five decades. On genotypes resurrected across the five decades, we measured plastic and genetic differences in CTmax, body size, Hb content and differential expression of four heat shock proteins after exposure to temperature as single stress and in combination with food levels and insecticide loads. We observed evolution of the critical thermal maximum and plastic response in body size, HSP expression and Hb content over time in a warming only scenario. Molecular and physiological responses to extreme temperature in multifarious environments were not predictable from the response to warming alone. Underestimating the effect of multiple stressors on thermal tolerance can lead to wrong estimates of species evolvability and persistence.

AB - Species extinction rates are many times greater than the direst predictions made two decades ago by environmentalists, largely because of human impact. Major concerns are associated with the predicted higher recurrence and severity of extreme events, such as heat waves. Although tolerance to these extreme events is instrumental to species survival, little is known whether and how it evolves in natural populations, and to what extent it is affected by other environmental stressors. Here, we study physiological and molecular mechanisms of thermal tolerance over evolutionary times in multifarious environments. Using the practice of ‘resurrection ecology’ on the keystone grazer Daphnia magna, we quantified genetic and plastic differences in physiological and molecular traits linked to thermal tolerance in historical and modern genotypes of the same population. This population experienced an increase in average temperature and occurrence of heat waves, in addition to dramatic changes in water chemistry, over five decades. On genotypes resurrected across the five decades, we measured plastic and genetic differences in CTmax, body size, Hb content and differential expression of four heat shock proteins after exposure to temperature as single stress and in combination with food levels and insecticide loads. We observed evolution of the critical thermal maximum and plastic response in body size, HSP expression and Hb content over time in a warming only scenario. Molecular and physiological responses to extreme temperature in multifarious environments were not predictable from the response to warming alone. Underestimating the effect of multiple stressors on thermal tolerance can lead to wrong estimates of species evolvability and persistence.

KW - heat shock proteins

KW - haemoglobin

KW - global change

KW - Daphnia magna

KW - CTmax

KW - body size

U2 - 10.1111/mec.14890

DO - 10.1111/mec.14890

M3 - Article

C2 - 30298601

VL - 27

SP - 4529

EP - 4541

JO - Molecular Ecology

JF - Molecular Ecology

SN - 0962-1083

IS - 22

ER -