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Latitudinal shift in thermal niche breadth results from thermal release during a climate-mediated range expansion

Lancaster, Lesley T.; Dudaniec, Rachael LU ; Hansson, Bengt LU and Svensson, Erik LU (2015) In Journal of Biogeography 42(10). p.1953-1963
Abstract
AimClimate change is currently altering the geographical distribution of species, but how this process contributes to biogeographical variation in ecological traits is unknown. Range-shifting species are predicted to encounter and respond to new selective regimes during their expansion phase, but also carry historical adaptations to their ancestral range. We sought to identify how historical and novel components of the environment interact to shape latitudinal trends in thermal tolerance, thermal tolerance breadth and phenotypic plasticity of a range-shifting species. LocationSouthern and central Sweden. MethodsTo evaluate phenotypic responses to changes in the thermal selective environment, we experimentally determined the upper and lower... (More)
AimClimate change is currently altering the geographical distribution of species, but how this process contributes to biogeographical variation in ecological traits is unknown. Range-shifting species are predicted to encounter and respond to new selective regimes during their expansion phase, but also carry historical adaptations to their ancestral range. We sought to identify how historical and novel components of the environment interact to shape latitudinal trends in thermal tolerance, thermal tolerance breadth and phenotypic plasticity of a range-shifting species. LocationSouthern and central Sweden. MethodsTo evaluate phenotypic responses to changes in the thermal selective environment, we experimentally determined the upper and lower thermal tolerances of >2000 wild-caught damselflies (Ischnura elegans) from populations distributed across core and expanding range-edge regions. We then identified changing correlations between thermal tolerance, climate and recent weather events across the range expansion. Niche modelling was employed to evaluate the relative contributions of varying climatic selective regimes to overall habitat suitability for the species in core versus range-edge regions. ResultsUpper thermal tolerance exhibited local adaptation to climate in the core region, but showed evidence of having been released from thermal selection during the current range expansion. In contrast, chill coma recovery exhibited local adaptation across the core region and range expansion, corresponding to increased climatic variability at higher latitudes. Adaptive plasticity of lower thermal tolerances (acclimation ability) increased towards the northern, expanding range edge. Main conclusionsOur results suggest micro-evolutionary mechanisms for several large-scale and general biogeographical patterns, including spatially and latitudinally invariant heat tolerances (Brett's rule) and increased thermal acclimation rates and niche breadths at higher latitudes. Population-level processes unique to climate-mediated range expansions may commonly underpin many broader, macro-physiological trends. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Character release, colonization and range shifts, habitat suitability, insect invasions, macroecology, Ischnura elegans, Maxent, species, distribution model, Sweden, thermotolerance
in
Journal of Biogeography
volume
42
issue
10
pages
1953 - 1963
publisher
Wiley-Blackwell
external identifiers
  • wos:000361181900014
  • scopus:84941112627
ISSN
1365-2699
DOI
10.1111/jbi.12553
language
English
LU publication?
yes
id
062726a3-f430-4940-9817-cb46cc6cb07c (old id 8074326)
date added to LUP
2015-10-21 11:17:05
date last changed
2017-09-10 03:06:56
@article{062726a3-f430-4940-9817-cb46cc6cb07c,
  abstract     = {AimClimate change is currently altering the geographical distribution of species, but how this process contributes to biogeographical variation in ecological traits is unknown. Range-shifting species are predicted to encounter and respond to new selective regimes during their expansion phase, but also carry historical adaptations to their ancestral range. We sought to identify how historical and novel components of the environment interact to shape latitudinal trends in thermal tolerance, thermal tolerance breadth and phenotypic plasticity of a range-shifting species. LocationSouthern and central Sweden. MethodsTo evaluate phenotypic responses to changes in the thermal selective environment, we experimentally determined the upper and lower thermal tolerances of >2000 wild-caught damselflies (Ischnura elegans) from populations distributed across core and expanding range-edge regions. We then identified changing correlations between thermal tolerance, climate and recent weather events across the range expansion. Niche modelling was employed to evaluate the relative contributions of varying climatic selective regimes to overall habitat suitability for the species in core versus range-edge regions. ResultsUpper thermal tolerance exhibited local adaptation to climate in the core region, but showed evidence of having been released from thermal selection during the current range expansion. In contrast, chill coma recovery exhibited local adaptation across the core region and range expansion, corresponding to increased climatic variability at higher latitudes. Adaptive plasticity of lower thermal tolerances (acclimation ability) increased towards the northern, expanding range edge. Main conclusionsOur results suggest micro-evolutionary mechanisms for several large-scale and general biogeographical patterns, including spatially and latitudinally invariant heat tolerances (Brett's rule) and increased thermal acclimation rates and niche breadths at higher latitudes. Population-level processes unique to climate-mediated range expansions may commonly underpin many broader, macro-physiological trends.},
  author       = {Lancaster, Lesley T. and Dudaniec, Rachael and Hansson, Bengt and Svensson, Erik},
  issn         = {1365-2699},
  keyword      = {Character release,colonization and range shifts,habitat suitability,insect invasions,macroecology,Ischnura elegans,Maxent,species,distribution model,Sweden,thermotolerance},
  language     = {eng},
  number       = {10},
  pages        = {1953--1963},
  publisher    = {Wiley-Blackwell},
  series       = {Journal of Biogeography},
  title        = {Latitudinal shift in thermal niche breadth results from thermal release during a climate-mediated range expansion},
  url          = {http://dx.doi.org/10.1111/jbi.12553},
  volume       = {42},
  year         = {2015},
}