Investigating old-growth ponderosa pine physiology using tree-rings, δ¹³ C, δ¹⁸ O, and a process-based model.

ABSTRACT: In dealing with predicted changes in environmental conditions outside those experienced today, forest managers and researchers rely on process-based models to inform physiological processes and predict future forest growth responses. The carbon and oxygen isotope ratios of tree-ring cellulose (δ¹³ C_cell , δ¹⁸ O_cell ) reveal long-term, integrated physiological responses to environmental conditions. We incorporated a submodel of δ¹⁸ O_cell into the widely used Physiological Principles in Predicting Growth (3-PG) model for the first time, to complement a recently added δ¹³ C_cell submodel. We parameterized the model using previously reported stand characteristics and long-term trajectories of tree-ring growt

SUBMITTER: Ulrich DEM 

PROVIDER: S-EPMC6645703 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature