HAL Id: hal-01269340
https://hal.archives-ouvertes.fr/hal-01269340
Submitted on 6 Jun 2020
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The french long-term intensive observation and experimentation network for environmental research in
forest ecosystems
Louis Mareschal, Olivier Roupsard, Frédéric Gay, Yann Nouvellon, Serge Rambal, Roland Huc, Denis Loustau, Arnaud Legout, Jacques Ranger,
Marie-Pierre Turpault, et al.
To cite this version:
Louis Mareschal, Olivier Roupsard, Frédéric Gay, Yann Nouvellon, Serge Rambal, et al.. The french long-term intensive observation and experimentation network for environmental research in forest ecosystems. Séminaire forêts hétérogènes du GIP ECOFOR, 2012, NA, France. 1 p. �hal-01269340�
SOERE
F-ORE-T
The French Long-term Intensive Observation and
Experimentation Network for Environmental Research in Forest
ecosystems
History : the network was created in 2002 under
the framework of GIP ECOFOR. Thanks to the high
research level performed in the network, it got the
French label SOERE in 2010 (out of 13 SOERE in
total, all fields together, in France)
Design of the network: it combines 15 highly instrumented sites with two networks of permanent sample
plots. F-ORE-T operates both in France and in the tropics (with local partners)
The overall objectives are to understand the
functioning of forest ecosystems by studying
stocks and fluxes of carbon, water and nutrients;
by identifying the processes involved in these
fluxes; and by evaluating their responses (and
resilience) to perturbations (in particular global
changes).
FLUX TOWERS
IN SITU
LABELLING
EDDY
COVARIANCE
CONTROLLED
PRECIPITATIONS
ROOT
PROSPECTION
THROUGHFALL
STEMFLOW
ZERO TENSION
LYSIMETERS, and
TENSION
LYSIMETERS
Some
results
Time lag in soil
è
Beech: 12 ~ 32 h
èOak: 14 ~ 26 h
èPine: 39 ~ 110 h
Peak time in soil
è
Beech: 41 ~ 89 h
èOak: 38 ~ 89 h
èPine: 89 ~ 278 h
Carbon Allocation in Trees and Soil -
ANR-07-BLAN-0109 C.A.T.S. (Fontainebleau, Hesse, Landes), 13C
Leaf Labeling
0.00 0.01 0.02 0.03 0.04 0 20 40 60 80Days after labelling
13 C in e xc es s (g C m -2 j -1 ) 3 days 0 5 10 15 20 25 30 0 2 4 6
days after labelling
13 C in e xc es s (m g/ kg ) Bulk OMSoluble OM µbiom. 0-5 cm Microbial biomass Beech, Sept 2008 -20 -15 -10 -5 0 5 10 15 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 NEE GPP Reco
Inter-annual variability of carbon sequestration
(Hesse site, Beech forest)
•
Annual net ecosystem C sequestration :
Average of
-
3.9 ± 1.7 tC ha-1 an-1
•
30% of GPP (or 60% of NPP) used for tree
growth
•
High inter-annual variability of C
sequestration (
8 years of continuous
measurements are necessary to get a
good precision on Reco; 5 years for GPP
and 6 years for NEE
)
-20 -10 0 10 20 30 40 50 D ry m at te r (k g .t re e
-1 ) Bud and cone
Foliage Branche Bark Stem wood Root
C I P IP F IF
b b ab ab a a a a a a a aBud and cone Foliage Branch Bark Stem wood Root -20 -10 0 10 20 30 40 50 D ry m at te r (k g .t re e
-1 ) Bud and cone
Foliage Branche Bark Stem wood Root
C I P IP F IF
b b ab ab a a a a a a a aBud and cone Foliage
Branch Bark
Stem wood Root
Bud and cone Foliage
Branch Bark
Stem wood Root
Impact of fertilisation (P – phosphorus only; F – phosphorus and nitrogen)
and irrigation (I) on biomass partitioning (Maritime Pine Landes sites).
Higher impact on above-ground compartments (Trichet et al. 2008)
Fertilisation with potassium in
Eucalyptus plantation in Brazil:
a higher Leaf Area Index due
to a higher leaf life span
(Laclau et al. 2008)
Contacts: Laurent Saint-André (standre@cirad.fr or st-andre@nancy.inra.fr)
CIRAD, UMR ECO&SOLS : CRDPI Congo (L. Mareschal), CATIE Costa-Rica (O. Roupsard), KU Thaïlande (F. Gay), ESALQ-USP Brésil (Y. Nouvellon)
CNRS UMR CEFE (DREAM) Montpellier,– Puéchabon (S. Rambal) INRA Avignon URFM– Font-Blanche (R. Huc)
INRA Bordeaux UR EPHYSE– Landes (D. Loustau)
INRA Nancy UR BEF– Breuil (A. Legout) – Fougères (A. Legout) – Azrailles/Clemront (J. Ranger) - Montiers (M.P. Turpault + E. Leclerc ANDRA)
INRA Nancy UMR EEF INRA–UHP, Hesse (A. Granier), Moyenvic (N. Marron) - Guyaflux (D. Bonal) UMR Ecofog – Guyafor (L. Blanc)
ONF Département des Recherches Techniques, Fontainebleau –Renecofor (Manuel Nicolas) – Direction Régionale de Guyane Guyafor (S. Guitet)
UMR 8079 ESE Univ. Paris XI-Orsay, CNRS, AgroParistech, Fontainebleau (E. Dufrêne)
