2024
Temperature-induced germination pulses above the alpine tree line
PALOSSE, Audrey, Alma PIERMATTEI, Jan ESPER, Frederick REINIG, Anne VERSTEGE et. al.Základní údaje
Originální název
Temperature-induced germination pulses above the alpine tree line
Autoři
PALOSSE, Audrey, Alma PIERMATTEI, Jan ESPER, Frederick REINIG, Anne VERSTEGE, Max TORBENSON, Mirek TRNKA, Tito AROSIO a Ulf BÜNTGEN (276 Německo, garant, domácí)
Vydání
Arctic, Antarctic, and Alpine Research, Taylor and Francis Ltd. 2024, 1523-0430
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10500 1.5. Earth and related environmental sciences
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 2.000 v roce 2022
Organizační jednotka
Přírodovědecká fakulta
UT WoS
001269868100001
Klíčová slova anglicky
Alpine ecology; climate change; dendrochronology; plant communities; vegetation dynamics
Štítky
Příznaky
Mezinárodní význam, Recenzováno
Změněno: 7. 8. 2024 10:36, Mgr. Marie Šípková, DiS.
Anotace
V originále
Subject to a long research tradition, the tree line is considered an important biogeographic indicator of climate changes and associated range shifts. Realized tree line positions and the potential tree line isotherm are, however, rarely in equilibrium because trees are unable to track rapid temperature variations. Often ignored in tree line research, this dilemma constrains the suitability of tree line trees for understanding alpine vegetation responses to anthropogenic warming. Here, we present combined dendrochronological and wood anatomical assessments of 1,351 seedlings and saplings from three subalpine forest species—larch (Larix decidua Mill.), pine (Pinus cembra L.), and spruce (Picea abies)—collected between ~2,200 and 2,600 m.a.s.l. in the Swiss Alps. We found evidence for temperature-induced, pulse-like seedling germination, rather than a continuous, long-term upward movement. Though the species spread across overlapping elevational ranges, larch was found at the highest elevations, followed by spruce and pine. Surprisingly, we found a varying age structure, with no sign of decreasing age toward higher elevations. Spring and summer temperatures promoted germination pulses, but postgermination survival was likely facilitated by species-specific plant traits. Our study demonstrates the importance of seedling and sapling data from above the tree line to understand prevailing vegetation dynamics at cold temperature extremes and also suggests future tree line advancement in the Swiss Alps.