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Thermal tolerance of tropical and temperate alpine plants suggests that 'mountain passes are not higher in the tropics'
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SYSNO ASEP 0580097 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Thermal tolerance of tropical and temperate alpine plants suggests that 'mountain passes are not higher in the tropics' Author(s) Sklenář, P. (CZ)
Jaramillo, R. (EC)
Sivila Wojtasiak, Susanne (UEK-B)
Meneses, R. I. (BO)
Muriel, P. (EC)
Klimeš, A. (CZ)Number of authors 6 Source Title Global Ecology and Biogeography - ISSN 1466-822X
Roč. 32, č. 7 (2023), s. 1073-1086Number of pages 14 s. Publication form Print - P Language eng - English Country GB - United Kingdom Keywords elevational rapoports rule ; frost-resistance ; heat tolerance ; cold-hardiness ; latitudinal patterns ; climatic variability ; freezing resistance ; range expansions ; paramo ; leaves ; climate seasonality ; ecophysiology ; Rapoport's rule ; temperature resistance ; the Andes ; thermal biology ; thermal tolerance breadth Subject RIV EF - Botanics OECD category Ecology R&D Projects GA17-12420S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000961720200001 EID SCOPUS 85151999781 DOI 10.1111/geb.13678 Annotation AimTolerance of species to extreme temperatures largely determines their distribution and vulnerability to climate change. We examined thermal tolerance in tropical and temperate alpine plants, testing the hypotheses that: (a) temperate plants are resistant to more extreme temperatures and have an overall wider thermal tolerance breadth (TTB), (b) TTB in temperate plants is wider than TTB in tropical plants during the entire growing season, (c) resistance to frost and heat varies during the season in temperate plants but not in tropical plants, (d) TTB of a species predicts its latitudinal range. LocationTropical (Ecuador, Bolivia) and temperate (USA, Austria) mountains. Time periodFour periods of the growing season (2014, 2016-2019). Major taxaNinety-six vascular plant species. MethodsWe employed the electrolyte leakage method to estimate the temperature resistance, that is, the temperature at which 50% tissue injury (Lt50) occurs in leaves. We used phylogenetic linear mixed-effect models in a Bayesian framework to test for differences between the plant groups. ResultsTemperate and tropical plants do not differ in their temperature resistance. The four hypotheses are rejected since: (a) temperate plants do not have significantly wider overall TTB compared to tropical plants, (b) TTB of temperate plants is wider than TTB of tropical plants only at the end of the temperate summer, (c) seasonal acclimation is observed in both plant groups, (d) the latitudinal range of the plants is not related to TTB. Main conclusionsThe lack of TTB differences between temperate and tropical alpine plants is consistent with trends observed in ectothermic animals, which suggests a general latitudinal pattern in high-elevation poikilotherm organisms. Limited acclimation capacity to cope with long freezing exposures restricts the occurrence of tropical alpine species to thermally aseasonal environments making them particularly vulnerable to climate change. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2024 Electronic address https://onlinelibrary.wiley.com/doi/10.1111/geb.13678
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