Radial growth decline in a tropical Andean treeline in Bolivia
Rose Oelkers,Laia Andreu-Hayles,Rosanne D'Arrigo,Hung T. T. Nguyen,Arturo Pacheco Solana,Milagros Rodriguez-Caton,M. Eugenia Ferrero,Ernesto Tejedor,Alfredo F. Fuentes,Carla Maldonado,and Daniel Ruiz-Carrascal
Herbario Nacional de Bolivia, Instituto de Ecología, Carrera de Biología, Facultad de Ciencias Puras y Naturales, Universidad Mayor de San Andrés, La Paz, Bolivia
Ecological and Conservation Synthesis Department, Conservation and Restoration Division, Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, MO 63110, USA
Carla Maldonado
Herbario Nacional de Bolivia, Instituto de Ecología, Carrera de Biología, Facultad de Ciencias Puras y Naturales, Universidad Mayor de San Andrés, La Paz, Bolivia
Ecological and Conservation Synthesis Department, Conservation and Restoration Division, Missouri Botanical Garden, 4344 Shaw Blvd., St. Louis, MO 63110, USA
Daniel Ruiz-Carrascal
Innovation and Technological Development Directorate, Universidad EAFIT, Medellin, Colombia
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We analyzed the tree rings in several Polylepis pepei from a tropical treeline in South America and found that the annual growth rate steadily decreased between 1960 and 2015. Our results suggest that the trees formed smaller rings in response to the significant increase of hot and dry conditions observed at the site. These results provide the first long-term record of forest age, growth history, and climate dynamics in an understudied biodiversity hotspot in Andes-Amazon region.
We analyzed the tree rings in several Polylepis pepei from a tropical treeline in South America...