Tree-rings to climate relationships in nineteen provenances of four black pines sub-species (Pinus nigra Arn.) growing in a common garden from Northwest Tunisia |
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| Affiliation: | 1. National Research Institute of Rural Engineering, Water and Forestry (INRGREF), BP 10, Ariana, 2080, Tunisia;2. National institute of agronomy Tunis, BP 48, Tunis, 1082, Tunisia;3. Mediterranean Institute of Biodiversity and Ecology (IMBE), Aix Marseille University, Univ Avignon, CNRS, IRD, Arbois Mediterranean Europole, BP 80, 13 545 Aix en Provence Cedex 4, France;4. INRA, UR629, Ecology of Mediterranean Forests (URFM), Domaine Saint-Paul, 84 914, Avignon Cedex 9, France;1. McDonald Institute for Archaeological Research, University of Cambridge, Downing St., Cambridge, CB2 3ER, United Kingdom;2. School of Social Science, The University of Queensland, Michie Building (Level 3), St Lucia, Brisbane 4072, Australia;1. Joint Research Unit CTFC - AGROTECNIO, Av. Alcalde Rovira Roure 191, E-25198 Lleida, Spain;2. Department of Crop and Forest Sciences, University of Lleida, Av. Alcalde Rovira Roure 191, E-25198 Lleida, Spain;3. AGROTECNIO (Center for Research in Agrotechnology), Av. Alcalde Rovira Roure 191, E-25198 Lleida, Spain;4. Integrative Crop Ecophysiology Group, Plant Physiology Section, Faculty of Biology, University of Barcelona, E-08028 Barcelona, Spain;1. Department of Wood Science, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 61300 Brno, Czech Republic;2. Global Change Research Institute of the Czech Academy of Sciences, Bělidla 986/4a, 60300 Brno, Czech Republic;3. Institute for Preservation of Archaeological Heritage of Central Bohemia, Nad Olšinami 448/3, 100 00 Praha, Czech Republic;4. Archaeological Centre Olomouc, U Hradiska 42/6, 77900 Olomouc, Czech Republic;5. Department of History, Faculty of Arts, Palacky University Olomouc, Křížkovského 10, 771 80 Olomouc, Czech Republic;6. Institute of Archaeology of the Czech Academy of Sciences, Letenská 4, 118 01 Praha, Czech Republic;7. DendroLab Brno, Eliášova 37, 61600 Brno, Czech Republic;8. Institute of Forest Sciences, University of Freiburg, Tennenbacher Str. 4, 79106 Freiburg, Germany;1. Department of Geography, University of Western Ontario, London, Ontario N6A 5C2, Canada;2. Parks Canada, 145 McDermot Avenue, Winnipeg, Manitoba, R3B 0R9, Canada;3. SWECO, Quay2, 139 Fountain Bridge, Edinburgh, EH3 9QG, Scotland, United Kingdom;4. Department of Alumni Relations, University of Western Ontario, London, Ontario N6A 3K7, Canada;1. Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 620144, Ekaterinburg, Russia;2. Department of History of the Institute of Humanities, Ural Federal University, 620000, Ekaterinburg, Russia;3. Institute of Ecology, Abkhazian Academy of Sciences, 384900, Sukhum, Abkhazia |
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| Abstract: | In the Mediterranean region, the effects of climate change on tree growth have been more and more noticeable in recent decades. Pinus nigra is one of the most common mid-elevation pine in this region and one of the species most affected by increasing dryness. In Tunisia, in order to guide species selection for future reforestation of the Khroumirie Mountains, research studies are under way to improve knowledge of black pine ecology. The effects of interannual climate variations on radial growth were compared for 19 provenances of black pine in a 51-year-old common garden experiment in Souiniet (NW Tunisia, 492m) in a humid Mediterranean bioclimate. A significant positive correlation with April precipitation and a significant negative correlation with spring temperature were noted. A cool wet spring is beneficial to growth as it affects tree water balance at the onset of the growing season; in contrast, spring drought is responsible for low annual growth. Mild January–February temperatures have a positive influence on ring width as mild winters may foster photosynthesis and promote early resumption of cambial activity. Analysis of the pointer years showed that winter snow and hail are major factors limiting growth of black pine in the studied area. Despite overall similarities in ring width to climate relationships among provenances, differences observed attest to the interaction of the environment and genetic control of black pine diameter growth. |
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| Keywords: | Tree-ring Climate change Dendroecology Growth-climate response Intraspecific variation Provenances |
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