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An investigation into the impact of elevated CO2 upon the response of European forests

Objective

(A) To assess the impact of elevated atmospheric CO2 concentrations on the physiology of growth processes in European forest trees.
(B) To develop, parameterize and test models of functional processes at the stand scale that will enable predictions of CO2 and water vapour exchanges of stands in a high CO2 environment.

The growth processes expected to change in an elevated CO2 environment are as follows:
- CO2 assimilation
- Respiration, both growth and maintenance
- Carbon allocation to stem leaves and roots, particularly in relation to nitrogen availability
- Leaf area dynamics
- Root length development and population dynamics
In order to study these processes the following methodology will be used:
i) For cultivation or preconditioning of young trees or parts of older trees in a high CO2 environment
- open top chambers (OTC) - mini greenhouses and environmental tunnels - branch bags on larger trees
ii) For assessment of impact
- growth analysis - CO2 and water vapour exchange with cuvettes in situ - CO2 and water exchange in relation to controlled variables in laboratory systems - isolation of chlorophyll proteins and analysis of Rubisco, cytochrome f and proteins of PS I and PS II using mono- and polyclonal antibodies
iii) For model development
- harmonisation of existing models to run on PC 386 - addition of new routines containing CO2-sensitive pressure points
iv) For model testing
- CO2 and water vapour flux measurements by eddy covariance above stands

Coordinator

University of Edinburgh
Address
Mayfield Road
EH9 3JU Edinburgh
United Kingdom

Participants (7)

Centre National de la Recherche Scientifique (CNRS)
France
Address

91405 Orsay
FACULTE UNIVERSITAIRE DES SCIENCES AGRONOMIQUES DE GEMBLOUX
Belgium
Address
Passage Des Deportes 2
Gembloux
Horticulture Research International
United Kingdom
Address
Worthing Road
BN17 6LP Littlehampton
NATURAL ENVIRONMENT RESEARCH COUNCIL
United Kingdom
Address
C/o Bush Estate
EH26 0QB Penicuik
TECHNISCHE UNIVERSITAET BERLIN
Germany
Address
Strasse Des 17. Juni 135
Berlin
UNIVERSIT DEGLI STUDI DELLA TUSCIA
Italy
Address
Via S. Camillo De Lellis
01100 Viterbo
UNIVERSITAIRE INSTELLING ANTWERPEN - UNIVERSITEIT ANTWERPEN
Belgium
Address
1,Universiteitsplein 1
2610 Wilrijk (Antwerpen)