New insights for Tropical Dendrochronology in Northern Bolivia
Topics: Paleoenvironmental Change
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Keywords: Dendrochronology, tropics, Bolivia, forests
Session Type: Virtual Paper Abstract
Day: Monday
Session Start / End Time: 2/28/2022 11:20 AM (Eastern Time (US & Canada)) - 2/28/2022 12:40 PM (Eastern Time (US & Canada))
Room: Virtual 40
Authors:
Rose Oelkers, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
Laia Andreu-Hayles, Lamont-Doherty Earth Observatory
Rosanne D'Arrigo, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
Arturo Pacheco-Solana, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
Ernesto Tejedor, SUNY-Albany
Eugenia Ferrero, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CONICET, Mendoza CP5500, ARGENTINA
Milagros Rodriguez-Caton, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
Troy Nixon, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
Clara Rodriguez, Tree-ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA
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Abstract
Recent advancements in tropical dendrochronology have improved and expanded the tree-ring network in South America. Here we highlight newly developed tree-ring width (TRW) chronologies collected from the Madidi National Park, a biodiversity hotspot in Northern Bolivia. Tree age, climate sensitivity, basic ring anatomy, and TRW variability is examined in 3 species that grow in a variety of ecosystems: Amburana cearensis from a low elevation (~900 m a.s.l.) tropical dry site , Juglans boliviana from a tropical wet forest (1400 m a.s.l.), and Polylepis pepei, a high elevation species (4400 m a.s.l.) from the northern Altiplano. The development of an annually resolved J. boliviana TRW chronology creates an opportunity to target this tree species in future dendrochronological work in the tropics. We also discuss the benefits of applying a multiparameter approach to tree-ring dating of tropical species as a supplement to the traditional methods in dendrochronology mostly based on the agreement among tree-growth variability from different trees visually and statistically through correlation coefficients. To successfully develop chronologies, we recommend (1) anatomical cuts to assist in the visualization and identification of the ring boundaries and (2) radiocarbon analysis in selected tree rings to independently confirm assigned dendrochronological calendar dates. At present, a small variety of tree species from northern Bolivia have been used in dendrochronological research and these records serve as an important part of the global effort to improve tree-ring data from tropical forests.
New insights for Tropical Dendrochronology in Northern Bolivia
Category
Virtual Paper Abstract
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