Dendrochronology and dendroclimatology of yew in Poland |
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| Institution: | 1. Beijing Key Laboratory of Traditional Chinese Medicine Protection and Utilization, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;2. College of Life Sciences, Hebei Normal University, Shijiazhuang, Hebei 050024, China;3. Environment and Sustainability Institute, University of Exeter, Penryn Campus, Penryn, Cornwall TR10 9FE, UK;1. College of Forestry, Beijing Forestry University, Beijing 100083, PR China;2. Ordos Forestry and Grassland Development Center, Ordos 017000, China;1. Institute of Earth Sciences, Faculty of Natural Sciences, University of Silesia in Katowice, B?dzińska 60, Sosnowiec 41-200, Poland;2. Institute of Geography and Regional Development, University of Wroclaw, Plac Uniwersytecki 1, Wroc?aw 50-137, Poland;1. Jan Evangelista Purkyně University, Faculty of Environment, Department of Environment, Pasteurova 15, 400 96 Ústí n. Labem, Czech Republic;2. Czech University of Life Sciences Prague, Faculty of Forestry and Wood Sciences, Kamýcká 129, Suchdol, 165 00 Praha 6, Czech Republic;3. Czech Academy of Sciences, Institute of Botany, Dukelská 135, T?eboň 379 01, Czech Republic;1. Department of Biology & Environment, Faculty of Natural Sciences, University of Haifa – Oranim, Tivon 36006, Israel;2. Department of Wood Science, Technical University in Zvolen, 96001 Zvolen, Slovakia;3. Department of Phytology, Technical University in Zvolen, 96001 Zvolen, Slovakia;1. Centre for Research and Conservation of Cultural Heritage, Faculty of Fine Arts, Nicolaus Copernicus University, 87–100 Toruń, Poland;2. Section of Ecology and Systematics, Department of Biology, National and Kapodistrian University of Athens, Panepistimiopolis, 15784 Athens, Greece;3. Department of Archaeology and History of Art, Koç University, 34450 Istanbul, Turkey;4. Laboratory of Absolute Dating, 31–351 Kraków, Poland;5. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Adama Mickiewicza Ave. 30, 30–059 Kraków, Poland |
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| Abstract: | This study concerns dendrochronology and dendroclimatology of yew growing in Poland. The yew (Taxus baccata L.), a long-lived, slow-growing tree, is regarded as a species threatened with extinction. The eastern boundary of its range transects Poland. The analyses were performed on 34 yew populations which are protected as parts of nature reserves, as nature monuments, or which are planned to be protected. Samples were collected using Pressler borer from a total of 774 trees yielding 1307 profiles. Classical dating techniques (including cross-dating method) were subsequently used to reconstruct 34 local chronologies. Average tree-ring width was 0.84 mm and ranged from 0.27 to 1.47 mm. For most stands, the age of the yew trees is overestimated. The studied populations most frequently are 100–200 years old, and the oldest yew trees in Poland are growing in the KS population (age estimated at 500–600 years). Average tree-ring width was found to be strongly dependent on the chronology length/tree age. The 674 pointer years calculated for the local chronologies served as a basis for determining pointer years for the entire study area. Negative years include: 1862, 1865, 1917, 1927, 1940, 1947, 1956, 1963, 1969, 1976, 1979, 1993, 1996, and 2003. Positive years are: 1884, 1914, 1916, 1965, 1977, 1988, 1997, and 2007. Analysis of weather conditions in those years demonstrated a strong relationship between tree-ring width and air temperature in winter, pre-spring, and early spring. Higher-than-average temperatures during those seasons correlate positively with yew tree-ring width. Response function analysis performed for local and regional chronologies point to a dominant role of air temperature in December of the year preceding growth and in January, February, and March of the current year (linear relationships). June precipitation is an additional factor affecting tree-ring width in some areas of northern and northwestern Poland: the higher the precipitation, the wider the tree-rings. The results obtained, particularly those concerning growth-climate relationships and dendroclimatic regionalisation, can be used in the on-going programme of yew restitution in Poland. |
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| Keywords: | Dendrochronology Dendroclimatology Tree-ring width Poland |
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