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Author Gaitan-Espitia, J.D.; Bacigalupe, L.D.; Opitz, T.; Lagos, N.A.; Timmermann, T.; Lardies, M.A.
Title Geographic variation in thermal physiological performance of the intertidal crab Petrolisthes violaceus along a latitudinal gradient Type
Year 2014 Publication Journal Of Experimental Biology Abbreviated Journal J. Exp. Biol.
Volume 217 Issue 24 Pages 4379-4386
Keywords Reaction norm; Thermal sensitivity; Heart rate; Thermotolerance; Thermal safety margin; Latitudinal gradients
Abstract Environmental temperature has profound effects on the biological performance and biogeographical distribution of ectothermic species. Variation of this abiotic factor across geographic gradients is expected to produce physiological differentiation and local adaptation of natural populations depending on their thermal tolerances and physiological sensitivities. Here, we studied geographic variation in whole-organism thermal physiology of seven populations of the porcelain crab Petrolisthes violaceus across a latitudinal gradient of 3000 km, characterized by a cline of thermal conditions. Our study found that populations of P. violaceus show no differences in the limits of their thermal performance curves and demonstrate a negative correlation of their optimal temperatures with latitude. Additionally, our findings show that high-latitude populations of P. violaceus exhibit broader thermal tolerances, which is consistent with the climatic variability hypothesis. Interestingly, under a future scenario of warming oceans, the thermal safety margins of P. violaceus indicate that lower latitude populations can physiologically tolerate the ocean-warming scenarios projected by the IPCC for the end of the twenty-first century.
Address [Diego Gaitan-Espitia, Juan; Bacigalupe, Leonardo D.] Univ Austral Chile, Fac Ciencias, Inst Ciencias Ambientales & Evolut, Valdivia 5090000, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Company Of Biologists Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-0949 ISBN Medium
Area Expedition Conference
Notes WOS:000346420200019 Approved
Call Number UAI @ eduardo.moreno @ Serial 432
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Author Lagos, M.; Caceres, C.W.; Lardies, M.A.
Title Geographic variation in acid- base balance of the intertidal crustacean Cyclograpsus cinereus ( Decapoda, Grapsidae) during air exposure Type
Year 2014 Publication Journal Of The Marine Biological Association Of The United Kingdom Abbreviated Journal J. Mar. Biol. Assoc. U.K.
Volume 94 Issue 1 Pages 159-165
Keywords emersion; latitudinal gradient; respiration; intertidal; Chile; lactate dehydrogenase; LDH; acidosis
Abstract In intertidal poikilotherms with wide geographic distribution, physiological variations are ubiquitous, due to phenotypic plasticity and/or individual geographic variation. Using the grapsid crab, Cyclograpsus cinereus as a study model, acclimatization differences in respiratory physiology were evaluated among populations along the Chilean coast, covering a latitudinal gradient of about 2000km. This species inhabits the supratidal zones and, therefore, is subject to constant immersion and emersion periods, producing physiological acidification due to CO2 retention, mainly in the branchial cavity. Individuals of six populations were collected along the coastline of Chile and were exposed to air for different time periods in the laboratory. The following parameters were measured: pH, Ca2+, Cl- and haemolymphatic lactate dehydrogenase (LDH) enzyme activity. Populations from lower latitudes were significantly different from those from central and southern Chile, with a higher haemolymphatic pH variation and higher Ca2+ level, along with lower levels of Cl- and LDH enzyme activity. This indicates that the populations from lower latitudes, which are subject to higher air temperatures during emersion, have a higher homeostatic capacity during emersion periods than those of intermediate and higher latitudes. This response seems to be determined by genetic bases due to adaptation to the local environment.
Address [Lagos, Marcelo; Caceres, Cristian W.] Univ Catolica Ssma, Fac Ciencias, Dept Ecol, Concepcion, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Cambridge Univ Press Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0025-3154 ISBN Medium
Area Expedition Conference
Notes WOS:000332452300016 Approved
Call Number UAI @ eduardo.moreno @ Serial 376
Permanent link to this record