The climate to growth relationships of pedunculate oak in steppe |
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| Institution: | 1. Institute for Evolutionary Ecology, National Academy of Sciences of Ukraine, 37, Lebedev str., Kiev, Ukraine;2. Sikhote-Alin State Nature Biosphere Reserve named after K.G. Abramov, 44, Partisanskaya str., 692150 Terney, Primorsky Krai, Russian Federation;3. Department of Biophysics, Donetsk National University, 21, 600-richya str., Vinnytsia, Ukraine;4. Department of Energy and Environment, Chalmers University of Technology, Maskingränd 2, Göteborg, 41258, Sweden;1. Instituto de Ecología Regional, Universidad Nacional de Tucumán, CC 34, 4107, Tucumán Argentina, Argentina;2. Centro de Investigación de Ecosistemas Urbanos, Universidad del Norte Santo Tomás de Aquino, Av. Perón 2085, 4107, Tucumán, Argentina;1. Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Kamycka 129, Praha6–Suchdol, Prague, 16521, Czech Republic;2. Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zurcherstrasse 111, CH-8903 Birmensdorf, Switzerland;3. Department of Forest Ecology, The Silva Tarouca Research Institute for Landscape and Ornamental Gardening, Lidicka 25/27, 602 00 Brno, Czech Republic;4. Faculty of Forestry, Ukrainian National Forestry University, Gen. Chuprynka 103, 790 57 Lviv, Ukraine;1. Earth System Science, University of California, Irvine, B321 Croul Hall, Irvine, CA 92697-3100, USA;2. Instituto de Física, Universidade Federal Fluminense, 24210-340 Niterói, RJ, Brazil;3. Laboratório de Botânica: anatomia vegetal e dendroecologia, Departamento de Biologia, Universidade Federal de Sergipe, 49900-000 São Cristóvão, Sergipe, Brazil;4. Escola Superior de Agricultura Luiz de Queiroz, Departamento de Ciências Florestais, Universidade de São Paulo, 13418-900 Piracicaba, SP, Brazil;1. School of Environment, The University of Auckland, Auckland, New Zealand;2. University College London, Institute of Archaeology, London, UK;3. Oxford Dendrochronology Laboratory, Oxford, UK |
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| Abstract: | Pedunculate oak (Quercus robur L.) is a long-lived species that dominates the extra–zonal natural forests in the steppe landscape of southeastern Ukraine. Although Q. robur is considered to be one of the most important species in European dendrochronology, it has received little attention in the steppe zone because of its scarcity in the often-degraded steppe forests. Nevertheless, a small and unique patch of old-growth oak exists within the boundary of Donetsk, a large industrial center in Eastern Europe. This forest is a remnant of an ancient wood and includes several dozen old-age trees that can contribute to filling some of the spatial gaps in pedunculate oak dendrochronology in Eastern Europe. In this study, we aim to determine the effect of climatic variables on pedunculate oak growth in the steppe zone, and to estimate the longevity of this species in the heterogeneous conditions of an urban forest. A total of 20 trees were cored for this study, varying in age from 55 to 254. The resulting tree-ring chronology correlates strongly with local precipitation in spring and summer, and with local temperature in April, June and July. Moving correlation analysis indicates a shift over the last 80 years in the relationship between oak growth and late winter and early spring temperatures, as well as between oak growth and precipitation in February and August. These findings imply that warming has caused both an advance in oak phenology and changes in the climatic conditions in early spring. |
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| Keywords: | Dendroclimatology Radial growth Age |
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