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Greater temperature sensitivity of plant phenology at colder sites: implications for convergence across northern latitudes.
Glob Chang Biol. 2017 Jan 11;
Publication Type
Janet Prevéy
Mark Vellend
Nadja Rüger
Robert D Hollister
Anne D Bjorkman
Isla H Myers-Smith
Sarah C Elmendorf
Karin Clark
Elisabeth J Cooper
Bo Elberling
Anna Maria Fosaa
Gregory H R Henry
Toke T Høye
Ingibjörg Svala Jónsdóttir
Kari Klanderud
Esther Lévesque
Marguerite Mauritz
Ulf Molau
Susan M Natali
Steven F Oberbauer
Zoe A Panchen
Eric Post
Sabine B Rumpf
Niels M Schmidt
Ted Schuur
Phillip R Semenchuk
Tiffany Troxler
Jeffrey M Welker
Christian Rixen
Glob Chang Biol. 2017 Jan 11;
Publication Type
Warmer temperatures are accelerating the phenology of organisms around the world. Temperature sensitivity of phenology might be greater in colder, higher-latitude sites than in warmer regions, in part because small changes in temperature constitute greater relative changes in thermal balance at colder sites. To test this hypothesis, we examined up to 20 years of phenology data for 47 tundra plant species at 18 high-latitude sites along a climatic gradient. Across all species, the timing of leaf emergence and flowering were more sensitive to a given increase in summer temperature at colder than warmer high-latitude locations. A similar pattern was seen over time for the flowering phenology of a widespread species, Cassiope tetragona. These are among the first results highlighting differential phenological responses of plants across a climatic gradient, and suggest the possibility of convergence in flowering times and therefore an increase in gene flow across latitudes as the climate warms. This article is protected by copyright. All rights reserved.
PubMed ID
28079308 View in PubMed
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