PARTNER 3: UA Research Group of Plant & Vegetation

Ecology

Prof. Dr. Reinhart CeulemansDr. Gaby Deckmyn

Vincent Budts

Contribution to CASIROZ

Development and use of a mechanistic model for the growth of beech under ozone stress

Development and maintenance of the database

The MEFYQUE model current status: running without ozone

To be developed:

Ozone effect (stomates, photosynthesis, allocation)

Soil processes including mychorrizae

The MEFYQUE model

Why a model ?

Why this model?

Very mechanistic

Includes ETP model (UK, S. Evans): soil water and ET

Newly developed: mechanistic allocation module

The MEFYQUE model

Some general principles:

Tree or tree category basis

Interaction between trees

All simulations run in layers

Distinction between sunlit and shaded leaves

The MEFYQUE modelAllocation

Based on pipe theory: relation between sapwood and leaf area

Actual relation between pipe size, number and transpiration is used

Ozone effects on allocation will occur simply through effects on stomatal control and photosynthesis

The MEFYQUE modelOutput

All C and H2O flows, ozone easily added

C in plant compartments (leaves, stem,…), differentiation between tissue types (parenchyma, fibres, vessels, EW and LW).

Explicit simulation of storage carbon

Crown and stem architecture, including branching, ring development,lean,…

The MEFYQUE modelInput required for the existing model

We will be running the model for European beech, so species parameters exist, specific values always better!

For weather data daily or hourly values of light, T, humidity, rainfall and wind are required

Biomass distribution of the trees is necessary, preferably including leaf area distribution

The MEFYQUE modelInput required for the ozone and mychorrizae model

Hopefully we will find all we need in the database

I will contact people by the end of 2004 with specific questions about mechanisms

I can add output or look into detailed processes: if anyone has suggestions, or questions, please contact me!

Database “CASIROZ”

Current status• database with all parameters, references and some

procedures in it. • manual of the database

Needed material• some short procedure description.• Data when available

Database “CASIROZ”

Aims• store data of all participants on one place

• each participant remains owner of his own data

• every partner can easily check information of others on the same material as their own measurements

• all data are stored in the same format and unit

• easy to compare and retrieve different measurements

• get data for modeling

Database “CASIROZ”

General structure of database

Retrieve data via input screens

Value

Parameter

Measurement ProcedureTreatment

ReferenceReferenceExperimentOperator

General structure of database

Value : central table 3 tables for experimental design

• Experiment: main information • Treatment: experimental conditions• Measurement: procedures and comments

Reference table linked with others to insure the combination information/reference

Retrieve data via input screens

9 screens to start from • References : Full list or search• Parameterlist• Screens for experiment, measurement, treatment and

values

In those screens you can click buttons to see further information

Retrieve data via input screens

There is a help button on the start screen

? About input screens look in the manual

Major problems or remarks send to vincent.budts@ua.ac.be

Remarks

Needed data• short description of procedures• measurement data that are available

Make clear which data you send !• from which group• whole data set or a part for the group