Modelling the Influence of Climatic Variability on Carbon and Water Budgets of Beech Saplings (Fagus sylvatica L.) Based on Field Data

Simulations of the changes in primary production of forests due to climate change generally operate with mean climatic values that neglect the year-to-year variability. An empirical model is presented to quantify changes in carbon and water budgets of the red beech tree Fagus sylvatica related to th...

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Bibliographic Details
Published in:Ecological modelling 1992-09, Vol.75, p.331-331
Main Authors: Stickan, Walter, Gansert, Dirk, Neemann, Gerd, Rees, Ulrich
Format: Article
Language:English
Online Access:Get full text
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Summary:Simulations of the changes in primary production of forests due to climate change generally operate with mean climatic values that neglect the year-to-year variability. An empirical model is presented to quantify changes in carbon and water budgets of the red beech tree Fagus sylvatica related to the variability of the climatic conditions. The model is based on measurements of biometrical plant data and on ecophysiological processes, such as leaf assimilation and transpiration. The field data were collected at a beech stand in Germany. Measurements of the photosynthetic photon flux density, air temperature, vapor pressure deficits, soil temperature, and specific physiological responses were determined and combined with the biomass of each respective plant compartment to get a quantitative estimate. The net assimilation input is consecutively diminished by the compartment-specific respiration rates, resulting in the net C uptake. The modeling procedure is detailed, with results showing that the C budget can be used to assess tree productivity under varying environmental conditions.
ISSN:0304-3800