Long-term temporal changes in central European tree phenology (1946−2010) confirm the recent extension of growing seasons
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One of the ways to assess the impacts of climate change on plants is analysing their long-term phenological data. We studied phenological records of 18 common tree species and their 8 phenological phases, spanning 65 years (1946−2010) and covering the area of the Czech Republic. For each species and phenophase, we assessed the changes in its annual means (for detecting shifts in the timing of the event) and standard deviations (for detecting changes in duration of the phenophases). The prevailing pattern across tree species was that since around the year 1976, there has been a consistent advancement of the onset of spring phenophases (leaf unfolding and flowering) and subsequent acceleration of fruit ripening, and a delay of autumn phenophases (leaf colouring and leaf falling). The most considerable shifts in the timing of spring phenophases were displayed by early-successional short-lived tree species. The most pronounced temporal shifts were found for the beginning of seed ripening in conifers with an advancement in this phenophase of up to 2.2 days year−1 in Scots Pine (Pinus sylvestris). With regards to the change in duration of the phenophases, no consistent patterns were revealed. The growing season has extended on average by 23.8 days during the last 35 years. The most considerable prolongation was found in Pedunculate Oak (Quercus robur): 31.6 days (1976−2010). Extended growing season lengths do have the potential to increase growth and seed productivity, but unequal shifts among species might alter competitive relationships within ecosystems.
KeywordsClimate change Flowering Growing season Long-term trends Phenology Trees
- Easterling DR (2002) Recent changes in frost days and the frost-free season in the United States. Bull Am Meteorol Soc 83:1327–1332Google Scholar
- Harrington R, Woiwood I, Sparks T (1999) Climate change and trophic interactions. Tree 14:146–150Google Scholar
- Larcher W (2006) Altitudial variation in flowering time of lilac (Syringa vulgaris L.) in the Alps in relation to temperature. Sitzungberichte und Anzeiger der mathematisch- naturwissenschaftlichen Klasse 212:3–18Google Scholar
- Menzel A, Sparks TH, Estrella N, Koch E, Aasa A, Ahas R, Alm-Kübler K, Bissolli P, Braslavská O, Briede A, Chmielewski FM, Crepinsek Z, Curnel Y, Dahl Å, Defila C, Donnelly A, Filella Y, Jatczak K, Måge F, Mestre A, Nordli Ø, Peñuelas J, Pirinen P, Remišová V, Scheifinger H, Striz M, Susnik A, van Vliet AJH, Wielgolaski F-E, Zach S, Zust A (2006) European phenological response to climate change matches the warming pattern. Glob Change Biol 12:1969–1976CrossRefGoogle Scholar
- Nekovář J, Hájková L (2010) Fenologická pozorování v Česku−Historie a současnost. Meteorologické zprávy 63:13–20Google Scholar
- Nekovář J, Dalezios N, Koch E, Kubin E, Nejedlik P, Niedzwiedz T, Sparks T, Wielgolaski F-E (2008) The history and current status of plant phenology in Europe. COST Action 725, BrusselsGoogle Scholar
- Partanen J, Leinonen I, Repo T (2001) Effect of accumulated duration of the light period on bud burst in Norway spruce (Picea abies) of varying ages. Silva Fenn 35:111–117Google Scholar
- R Development Core Team (2012) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www.R-project.org.
- Schwartz MD (2003) Phenology: an integrative environmental science. Kluwer, DordrechtGoogle Scholar
- Stříž M, Nekovář J (2010) Prostorová a časová analýza prvních květů a listů smrku obecného (1961−1990, 1991−2009). Meteorologické zprávy 63:101–107Google Scholar
- Trnka M, Olesen JE, Kersebaum KC, Skjelvåg AO, Eitzinger J, Seguin B, Peltonen-Sainio P, Rötter R, Iglesias A, Orlandini S, Dubrovský M, Hlavinka P, Balek J, Eckersten H, Cloppet E, Calanca P, Gobin A, Vučetić V, Nejedlik P, Kumar S, Lalic B, Mestre A, Rossi F, Kozyra J, Alexandrov V, Semerádová D, Žalud Z (2011c) Agroclimatic conditions in Europe under climatic change. Glob Change Biol 17:2298–2318CrossRefGoogle Scholar
- Zhang X, Friedl MA, Schaaf CB, Strahler AH, Schneider A (2004) The footprint of urban climates on vegetation phenology. Geophys Res Lett 31:1–4Google Scholar