Dendroclimatological assessment of Polylepis rodolfo-vasquezii: A novel Polylepis species in the Peru highlands |
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| Institution: | 1. Laboratorio de Dendrocronología, Universidad Continental, Av. San Carlos 1980, Huancayo, Peru;2. Laboratorio de Dendrocronología e Historia Ambiental, IANIGLA, CONICET, Av. Ruiz Leal s/n, Parque General San Martín, Mendoza, Argentina;1. Laboratorio de Dendrocronología, Universidad Continental, Av. San Carlos 1980, Huancayo, Peru;2. Laboratorio de Dendrocronología e Historia Ambiental, IANIGLA, CONICET, Av. Ruiz Leal s/n, Parque General San Martín, Mendoza, Argentina;1. Forest Ecology and Forest Management Group, Wageningen University and Research, P.O. Box 47, 6700 AA Wageningen, The Netherlands;2. Forestry and Wood Technology Discipline, Khulna University, Khulna-9208, Bangladesh;3. Wood Biology Service, Royal Museum for Central Africa (RMCA), Leuvensesteenweg 13, Tervuren, Belgium;4. Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Sylhet-3114, Bangladesh;1. Institut National pour l’Etude et la Recherche Agronomiques, Avenue des Cliniques 13, Kinshasha, Democratic Republic of the Congo;2. Service of Wood Biology, Royal Museum for Central Africa (RMCA), Leuvensesteenweg 13, 3080 Tervuren, Belgium;3. UGent-Woodlab, Ghent University, Laboratory of Wood Technology, Department of Forest and Water Management, Coupure Links 653, B-9000 Ghent, Belgium;4. Forest is Life, TERRA Teaching and Research Centre, Gembloux Agro Bio-Tech, University of Liège, Belgium;5. Centre for International Forestry Research, Indonesia;6. Resources & Synergies Development Pte Ltd, Singapore;7. University of Kisangani, Faculty of Renewable Natural Resources Management, Democratic Republic of the Congo;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 |
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| Abstract: | In spite of enormous diversity in tree species, dendrochronological records in the tropical Andes are very scarce. Therefore, it is necessary to increase the search for new tree species with high dendrochronological characteristics in the tropical Andes, including the humid Puna of Peru. We present the first tree-ring chronology from Polylepis rodolfo-vasquezii, a recently described tree species in the Central Andes of Peru between 4000 and 4400 m elevation. Fifty trees were sampled in the district of Comas, Peru. After establishing the anatomical characteristics that delimit the annual growth rings, we developed a ring-width chronology by applying conventional dendrochronological techniques. The chronology covers the period 1869–2015 (157 years) and is well replicated from 1920 to present (> 20 samples). The statistics used to evaluate the quality of the chronology indicate that the P. rodolfo-vasquezii has similar values of MS, RBAR and EPS to those shown by other Polylepis spp chronologies. To determine the main climatic factors controlling the growth of P. rodolfo-vasquezii, we compared our chronology with local and regional temperature and precipitation records. Growth season temperature (November to May) seems to be the main climatic factor modulating inter-annual variations in the growth of this species. The sensitivity to inter-annual temperature variations highlights the potential of P. rodolfo-vasquezii to provide climatically sensitive dendrochronological records in the Central Andes. To our knowledge, this is the first tree-ring record in South America displaying significant relationships with temperature over the tropical Atlantic Ocean. |
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| Keywords: | Central Andes of Peru Humid Puna Tree-ring chronologies Climatically sensitivity species |
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