Modelling forest dynamics along climate gradients in Bolivia

C. Seiler, R.W.A. Hutjes, B. Kruijt, J. Quispe, S. Añez, V.K. Arora, J.R. Melton, T. Hickler, P. Kabat

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

Dynamic vegetation models have been used to assess the resilience of tropical forests to climate change, but the global application of these modeling experiments often misrepresents carbon dynamics at a regional level, limiting the validity of future projections. Here a dynamic vegetation model (Lund Potsdam Jena General Ecosystem Simulator) was adapted to simulate present-day potential vegetation as a baseline for climate change impact assessments in the evergreen and deciduous forests of Bolivia. Results were compared to biomass measurements (819 plots) and remote sensing data. Using regional parameter values for allometric relations, specific leaf area, wood density, and disturbance interval, a realistic transition from the evergreen Amazon to the deciduous dry forest was simulated. This transition coincided with threshold values for precipitation (1400 mm yr-1) and water deficit (i.e., potential evapotranspiration minus precipitation) (-830 mm yr-1), beyond which leaf abscission became a competitive advantage. Significant correlations were found between modeled and observed values of seasonal leaf abscission (R2 = 0.6, p
Original languageEnglish
Pages (from-to)758-775
JournalJournal of Geophysical Research: Biogeosciences
Volume119
Issue number5
DOIs
Publication statusPublished - 2014

Keywords

  • global vegetation model
  • tropical forest
  • terrestrial biosphere
  • carbon-dioxide
  • rain-forest
  • biomass
  • productivity
  • variability
  • drought
  • dieback

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