Greater temperature sensitivity of plant phenology at colder sites: Implications for convergence across northern latitudes

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

  • Janet Prevéy
  • Mark Vellend
  • Nadja Rüger
  • Robert D. Hollister
  • Anne D. Bjorkman
  • Isla H. Myers-Smith
  • Sarah C. Elmendorf
  • Karin Clark
  • Elisabeth J. Cooper
  • Anna Maria Fosaa
  • Gregory H.R. Henry
  • Toke Thomas Høye
  • Ingibjörg S. 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
  • Edward A.G. Schuur
  • Phillip R. Semenchuk
  • Tiffany Troxler
  • Jeffrey M. Welker
  • Christian Rixen

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 was 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.

OriginalsprogEngelsk
TidsskriftGlobal Change Biology
Vol/bind23
Udgave nummer7
Sider (fra-til)2660-2671
Antal sider12
ISSN1354-1013
DOI
StatusUdgivet - 2017

Bibliografisk note

CENPERM[2017]

ID: 177189751