Dendrochronological potential of four neotropical dry-forest tree species: Climate-growth correlations in northeast Brazil |
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| Institution: | 1. Msc Ecology and Conservation (PPEC/UFS), Federal University of Sergipe, Marechal Rondon Avenue. No number. Rosa Elze, São Cristovão, Sergipe, 49100-000, Brazil;2. Department of Plant Biology, Institute of Biology, University of Campinas – UNICAMP, P.O. Box 6109, 13083-970, Campinas, SP, Brazil;3. Department of Biology, CCBS, Federal University of Sergipe, Marechal Rondon Avenue. No Number. Rosa Elze, São Cristovão, Sergipe, 49100-000, Brazil;1. School of Natural Resources, Copperbelt University, P.O. Box 21692, Kitwe, Zambia;2. Earth System Science Group, Wageningen University, P.O. Box 47, 6700AA Wageningen, The Netherlands;3. Department of Earth and Environmental Systems, Indiana State University, Terre Haute, IN, 47809 USA;4. Alterra Wageningen UR, P.O. Box 47, 6700AA Wageningen, The Netherlands;5. VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands;6. Environmental Systems Analysis Group, Wageningen University, P.O. Box 47, 6700AA Wageningen, The Netherlands;1. CEF – Forest Research Centre, School of Agriculture, University of Lisbon, Tapada da Ajuda, 1349-017 Lisboa, Portugal;2. CFE – Centre for Functional Ecology – Science for People & the Planet, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal;3. Ecofield, Monitorizações, Estudos e Projetos, LDA, Carcavelos, Portugal;1. Forest Growth, Albert-Ludwigs-University Freiburg, Tennenbacher Str. 4, 79106 Freiburg, Germany;2. Bioinformatics, Albert-Ludwigs-University Freiburg, Georges-Koehler-Allee 106, 79110 Freiburg, Germany;1. Laboratorio de Dendrocronología, Facultad de Ciencias Forestales y del Ambiente, Universidad Nacional del Centro del Perú, Av. Mariscal Castilla 3909, El Tambo, Huancayo, Peru;2. Laboratorio de Dendrocronología e Historia Ambiental, IANIGLA, CONICET. Av. Ruiz Leal s/n, Parque General San Martín, Mendoza, Argentina;3. Laboratorio de Dendrocronología, Universidad Continental. Av. San Carlos 1980, Huancayo, Peru;1. Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, E-28933, Móstoles, Spain;2. Unidad de Postgrado, Facultad de Ciencias Exactas y Tecnología, Universidad Autónoma Gabriel René Moreno, Campus Universitario, Santa Cruz de la Sierra, Bolivia;3. Universidad Pedagógica y Tecnológica de Colombia, Sede Tunja, 150003, Tunja, Colombia;4. Museo de Historia Natural “Noel Kempff Mercado”, Avda. Irala 565, 2489, Santa Cruz de la Sierra, Bolivia;5. Instituto Pirenaico de Ecología (IPE-CSIC), Avda. Montañana 1005, E-50192, Zaragoza, Spain |
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| Abstract: | Tropical dry forests (TDF) are highly important tropical forest ecosystems. Yet, these forests are highly threatened, usually neglected and only poorly studied. Understanding the long-term influences of environmental conditions on tree growth in these forests is crucial to understand the functioning, carbon dynamics and potential responses to future climate change of these forests. Dendrochronology can be used as a tool to provide these insights but has only scantly been applied in (dry) tropical forests. Here we evaluate the dendrochronological potential of four Caatinga neotropical dry forest tree species – Aspidosperma pyrifolium, Ziziphus joazeiro, Tabebuia aurea, and Libidibia ferrea – collected in two locations in northeastern Brazil (Sergipe state). We provide an anatomical characterization of the ring boundaries for the four species and investigate correlations of their growth with local and regional climatic variables. All four species form annual rings and show high inter-correlation (up to 0.806) and sensitivity (up to 0.565). Growth of all species correlated with local precipitation as well as with sea-surface temperatures in the tropical Atlantic and/or tropical Pacific oceans. We also show teleconnections between growth and the El Niño South Oscillation. The strong dependence of tree on precipitation is worrisome, considering that climate change scenarios forecast increased drought conditions in the Caatinga dry forest. Including more species and expanding dendrochronological studies to more areas would greatly improve our understanding of tree growth and functioning in TDFs. This type of knowledge is essential to assist the conservation, management and restoration of these critical tropical ecosystems. |
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| Keywords: | Growth rings Tree ring analysis Caatinga Climate change Secondary xylem |
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