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Article: Untangling the roles of microclimate, behaviour and physiological polymorphism in governing vulnerability of intertidal snails to heat stress

TitleUntangling the roles of microclimate, behaviour and physiological polymorphism in governing vulnerability of intertidal snails to heat stress
Authors
KeywordsClimate change
Heat budget model
Microhabitat
Physiological adaptation
Species distribution
Issue Date2017
PublisherThe Royal Society Publishing. The Journal's web site is located at http://rspb.royalsocietypublishing.org/
Citation
Proceedings of the Royal Society B: Biological Sciences, 2017, v. 284 n. 1854, p. article no. 20162367 How to Cite?
AbstractBiogeographic distributions are driven by cumulative effects of smaller scale processes. Thus, vulnerability of animals to thermal stress is the result of physiological sensitivities to body temperature (Tb), microclimatic conditions, and behavioural thermoregulation. To understand interactions among these variables, we analysed the thermal tolerances of three species of intertidal snails from different latitudes along the Chinese coast, and estimated potential Tb in different microhabitats at each site. We then empirically determined the temperatures at which heart rate decreased sharply with rising temperature (Arrhenius breakpoint temperature, ABT) and at which it fell to zero (flat line temperature, FLT) to calculate thermal safety margins (TSM). Regular exceedance of FLT in sun-exposed microhabitats, a lethal effect, was predicted for only one mid-latitude site. However, ABTs of some individuals were exceeded at sun-exposed microhabitats in most sites, suggesting physiological impairment for snails with poor behavioural thermoregulation and revealing inter-individual variations (physiological polymorphism) of thermal limits. An autocorrelation analysis of Tb showed that predictability of extreme temperatures was lowest at the hottest sites, indicating that the effectiveness of behavioural thermoregulation is potentially lowest at these sites. These results illustrate the critical roles of mechanistic studies at small spatial scales when predicting effects of climate change. © 2017 The Author(s) Published by the Royal Society. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/245855
ISSN
2019 Impact Factor: 4.637
2015 SCImago Journal Rankings: 2.375
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDong, YW-
dc.contributor.authorLi, XX-
dc.contributor.authorChoi, MP-
dc.contributor.authorWilliams, GA-
dc.contributor.authorSomero, GN-
dc.contributor.authorHelmuth, BS-
dc.date.accessioned2017-09-18T02:18:06Z-
dc.date.available2017-09-18T02:18:06Z-
dc.date.issued2017-
dc.identifier.citationProceedings of the Royal Society B: Biological Sciences, 2017, v. 284 n. 1854, p. article no. 20162367-
dc.identifier.issn0962-8452-
dc.identifier.urihttp://hdl.handle.net/10722/245855-
dc.description.abstractBiogeographic distributions are driven by cumulative effects of smaller scale processes. Thus, vulnerability of animals to thermal stress is the result of physiological sensitivities to body temperature (Tb), microclimatic conditions, and behavioural thermoregulation. To understand interactions among these variables, we analysed the thermal tolerances of three species of intertidal snails from different latitudes along the Chinese coast, and estimated potential Tb in different microhabitats at each site. We then empirically determined the temperatures at which heart rate decreased sharply with rising temperature (Arrhenius breakpoint temperature, ABT) and at which it fell to zero (flat line temperature, FLT) to calculate thermal safety margins (TSM). Regular exceedance of FLT in sun-exposed microhabitats, a lethal effect, was predicted for only one mid-latitude site. However, ABTs of some individuals were exceeded at sun-exposed microhabitats in most sites, suggesting physiological impairment for snails with poor behavioural thermoregulation and revealing inter-individual variations (physiological polymorphism) of thermal limits. An autocorrelation analysis of Tb showed that predictability of extreme temperatures was lowest at the hottest sites, indicating that the effectiveness of behavioural thermoregulation is potentially lowest at these sites. These results illustrate the critical roles of mechanistic studies at small spatial scales when predicting effects of climate change. © 2017 The Author(s) Published by the Royal Society. All rights reserved.-
dc.languageeng-
dc.publisherThe Royal Society Publishing. The Journal's web site is located at http://rspb.royalsocietypublishing.org/-
dc.relation.ispartofProceedings of the Royal Society B: Biological Sciences-
dc.subjectClimate change-
dc.subjectHeat budget model-
dc.subjectMicrohabitat-
dc.subjectPhysiological adaptation-
dc.subjectSpecies distribution-
dc.titleUntangling the roles of microclimate, behaviour and physiological polymorphism in governing vulnerability of intertidal snails to heat stress-
dc.typeArticle-
dc.identifier.emailWilliams, GA: hrsbwga@hkucc.hku.hk-
dc.identifier.authorityWilliams, GA=rp00804-
dc.description.naturelink_to_OA_fulltext-
dc.identifier.doi10.1098/rspb.2016.2367-
dc.identifier.pmid28469014-
dc.identifier.pmcidPMC5443929-
dc.identifier.scopuseid_2-s2.0-85019105235-
dc.identifier.hkuros277806-
dc.identifier.volume284-
dc.identifier.issue1854-
dc.identifier.spagearticle no. 20162367-
dc.identifier.epagearticle no. 20162367-
dc.identifier.isiWOS:000404425100016-
dc.publisher.placeUnited Kingdom-

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