An assessment of growth ring identification in subtropical forests from northwestern Argentina |
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| Institution: | 1. Grupo de Dendrocronología e Historia Ambiental, IANIGLA, CCT-CONICET-Mendoza, CC 330 (5500) Mendoza, Argentina;2. CIMAD Centro de Investigación en Maderas. Facultad de Ciencias Agrarias y Forestales. UNLP, CC 31 (1900) La Plata, Argentina;1. Department of Geography and Environmental Studies, Carleton University, Ottawa, Canada;2. Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Canada;3. Department of Geography, Brock University, St. Catharines, Canada;4. Heritage Program, Capital Planning Branch, National Capital Commission, Ottawa, Canada;1. CISOR, UNJu – CONICET, Argentina;2. Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción (CICyTTP CONICET), Dr. Matteri y España SN, E3105BWA, Diamante, Entre Ríos, Argentina;3. Centro Regional de Estudios Arqueológicos-FHyCS, UNJu, Argentina;1. Dipartimento di Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Via Francesco De Sanctis s.n.c., 86100, Campobasso, Italy;2. Dipartimento di Bioscienze e Territorio, Università degli Studi del Molise, Contrada Fonte Lappone s.n.c., 86090, Pesche, Italy;1. Faculty of Science, Department of Botany, University of South Bohemia, Na Zlaté Stoce 1, 37005 ?eské Budějovice, Czech Republic;2. Institute of Botany of the Academy of Sciences of the Czech Republic, Zámek 1, 25243 Pr?honice, Czech Republic;3. Department of Forest Sciences, University of Helsinki, P.O. Box 27, FI-00014, Finland;1. Dendrocronología e Historia Ambiental, IANIGLA, CCT-CONICET-MENDOZA, CC 330, M5500 Mendoza, Argentina;2. Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain;3. Inventario Nacional de Glaciares, IANIGLA, CCT-CONICET-MENDOZA, CC 330, M5500 Mendoza, Argentina;4. Department of Geography, University of Western Ontario, N6A 3K7 London, Canada |
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| Abstract: | Most subtropical forests in South America are located in regions with a marked seasonality in precipitation, which may induce the formation of annual bands in woody species. Due to the lack of precise information on tree-ring visibility, we evaluated the wood characteristics of 37 tree species in the subtropical Yungas and Chaco forests from northwestern (NW) Argentina. Anatomical features associated with the delimitation of growth bands were examined to establish the presence of tree rings. Different forest types reflect the precipitation gradients and wood anatomical features vary accordingly. Characteristics of wood structure are closely related to the dominant climatic patterns of each forest, revealing a common pattern of anatomical arrangements in terms of water transport and safety. In the Chaco and transitional forests, ring boundaries are related to marginal parenchyma whereas in montane forests growth ring boundary is mostly associated with the presence of thicker fibers at the end of the ring. The largest proportion of species with clearly marked growth rings occurs in the montane forest type of NW Argentina. Clear growth rings is a requisite for dendrochronological applications, hence the present work represents the first regional attempt to address the potential of subtropical species in South America to be used in dendrochronological studies. |
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| Keywords: | Tree rings Wood anatomy Montane forests Transitional forests Chaco Yungas |
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