Climatic response and impacts of drought on oaks at urban and forest sites |
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| Authors: | Sten Gillner Juliane Vogt Andreas Roloff |
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| Institution: | 1. Institute of Forest Botany and Forest Zoology, TU Dresden, Pienner Str. 7, 01737 Tharandt, Germany;2. Institute of Forest Growth and Forest Computer Sciences, TU Dresden, Pienner Str. 7, 01737 Tharandt, Germany;1. Instituto de Geologia, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria 04510, Mexico;2. Facultad de Quimica, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria 04510, Mexico;3. Instituto de Geofisica, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria 04510, Mexico;1. Institute of Biometeorology, National Research Council, Firenze, Italy;2. Department of Bioscience and Territory, University of Molise, Pesche, Italy;3. Department of Agro-biotechnologies, University of Florence, Firenze, Italy;4. Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK;1. Department of Agri-food Production and Environmental Science, University of Florence, viale delle Idee, 30, 50019, Sesto Fiorentino (FI), Italy;2. Centro MiRT – Fondazione Minoprio, viale Raimondi 54, 22070 Vertemate con Minoprio, CO, Italy;3. Research Unit CLimate chAnge SyStem and Ecosystem (CLASSE), University of Florence, Florence, Italy;4. LABVIVA (Laboratorio per la Ricerca nel Settore Vivaistico-Ornamentale, University of Florence), Italy;5. Trees and Timber Institute (IVALSA), National Research Council, Italy;1. Sustainable Consumption Institute (SCI), Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK;2. Faculty of Life Sciences, University of Manchester, Manchester M13 9PT, UK;1. Weihenstephan-Triesdorf University of Applied Sciences, Department of Landscape Architecture, Am Hofgarten 6, 85354 Freising, Germany;2. Technical University of Munich, Chair for Ecophysiology of Plants, Hans-Carl-von-Carlowitz-Platz 2, 85354 Freising, Germany;3. Technical University of Munich, Chair of Strategic Landscape Planning and Management, Emil-Ramann-Straße 6, 85354 Freising, Germany;1. Institut Ecocitoyen pour La Connaissance des Pollutions - Centre de Vie La Fossette, RD 268, 13270, Fos-sur-Mer, France;2. Aix Marseille Univ., CNRS, IRD, INRA, Coll France, CEREGE, Technopôle de L’Environnement Arbois-Méditerranée, BP80, 13545, Aix-en-Provence, France;3. Laboratoire Chrono-Environnement, UMR 6249, Université de Bourgogne Franche-Comté, Pôle Universitaire Du Pays de Montbéliard, 4 Place Tharradin, BP 71427, 25211, Montbéliard, France |
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| Abstract: | This study focuses on the climate and growth response of the sessile oak (Quercus petraea (Matt.) Liebl.) and the northern red oak (Quercus rubra L.) using dendrochronological methods. Tree-ring series of street trees in the city of Dresden, Germany and in a nature reserve close to the urban area were analysed, and the climate and growth response and moving correlation functions (CF) were computed. Moreover, the impact of 13 years of drought was examined by superposed epoch analysis (SEA). Our results show that differences emerge from peculiarities of the different site conditions, indicating that city oaks contain a higher level of noise in their ring width data due to human activities that degrade the strength of growth-climate associations. Importantly, climatic conditions during the previous summer and autumn and during the current spring season display significant correlations with annual growth. The stability of the climate–growth relationship was tested via moving correlation functions. A strong increase in the correlation with the temperature and precipitation in April was found for the trees of northern red oak in forests. Drought years induced significant reductions in radial growth for the northern red oak only. Nevertheless, the long-term impact of drought years must be considered as marginal because of the fast recovery of the radial growth after one to two years. In the future, the growth of the northern red oak may be restricted by an increased frequency of droughts and warmer and drier conditions in April. |
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| Keywords: | Climate–growth relationship Dendrochronology Drought response Street trees |
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