Download - RECIPE meeting, Charquemont October 23, 2003
RECIPE meeting, CharquemontRECIPE meeting, CharquemontOctober 23, 2003October 23, 2003
Andy Siegenthaler
Swiss Federal Research Institute WSL
Antenne romande
CH-1015 Lausanne / Switzerland
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Clo
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ents
La Chaux d’Abel / Le RusseyLa Chaux d’Abel / Le Russey
Le Russey
La Chaux d’Abel
Bog regeneration typology of the Jura - Bog regeneration typology of the Jura - Thesis Thesis from Yvan Matthey, 1993from Yvan Matthey, 1993
• Yvan Matthey’s work concerned the description of 369 situations along the Jura chain. He used factorial analyses using 6 common environmental descriptors.
• He describes three progressive series which differentiate into two independent (aquatic and terrestrial), and two parallel terrestrial progressive (changing) series. The ultimate stages of the 3 series’ evolutions show an obvious physiognomic “uniformisation” of the environments.
Terrestrial:
1) Hummocks’ serie (Eriophorum vagintum)2) Moss-lawns’ serie (Polytrichum strictum and Polytrichum commune)
Aquatic:
1) Trembling marsh (Potentilla palustris …Phagnum magellanicum)
• He also points out the importance of the mosaïc aspect in the early stages.
At la Chaux d’Abel, we have a mixture of the two terrestrial situations that appear in mosaïc plus a gradient in the progressive stages.
Choice of keystone species (WPI & WPII)Choice of keystone species (WPI & WPII)
Question: common plant species in order to compare climatic gradient (at
least Sphagnum sp + 1 specie)?
Baubt: Eriophorum angustifolium, Eriophorum vaginatum ? Triglochin sp?, Molinia caerulea?
Finland: Sphagnum sp, Eriophorum vaginatum, …?
Chaux d’Abel / Russey: Sphagnum sp, Eriophorum vaginatum, E. angustifolium and Polytrichum strictum
Scottland: Sphagnum sp, Eriophorum vaginatum, …?
0
10
20
30
40
50
60
34
5
7
2
134
34
34
7 7 7 7
=
6
6
34
6
6=
Old peat
1
2
3
4
5
6
7
Vascular plants’ litter
Vascular plants’ stems and leaves
Mosses or peat: 0<h≤5 cm below surface
Mosses or peat: 5-10 cm below surface
Peat: 12.5-17.5 cm below the surface
Peat: 22.5-27.5 cm below the surface
Peat: 32.5-37.5 cm below the surface
5
5
5
New peat
Nb of samples:
Sub-sampling strategy I and II in various situations
4(6) 5(7) 5(7) 4(6) 3(5)
2
1
6 Median water table
=
34
7
5
6
8
Peat: 42.5-47.5 cm below the surface8
34
7
5
6
8
34
7
5
6
8
34
7
5
6
8
34
7
5
6
8
4(6) 5(7) 4(6) 4(6) 4(6)
I II
c
I. Semi-systematic II. Systematic Taken for the analyses (i.g.)
c
some analyses
some analyses
The trenches at le RusseyThe trenches at le Russey
H = max. = old surface peat
H = mediane
H(water level) = min. = -33 cm
Filing up 50 cm
Buffer zone of 3.50 cm between trenches
Low water level: upper part of the pot 30 cm above the highest H
Intermediate water level
High water level: upper part of the pot 10 cm above the median H
Scale 100%
Sca
le 2
00%
11 m
Peat in place
Free water
If necessary, put a lateral drain to evacuate the water if the trenches fills up
50 cm85cm cm
Level zero
This part has to be filled up with porous peat This part has to be filled up with porous peat in order to allow for a horizontally mowing in order to allow for a horizontally mowing ground water levelground water level
Assignment of tubesAssignment of tubes
10 cm 10 cm 10 cm
30 cm 30 cm 30 cm 30 cm
5 cm 5 cm
15 cm 15 cm 15 cm 15 cm
L 1 L 2 L 3
Sp 1 Sp 2 Sp 3Sp 0
L 0
Year 1 Year 2
Sp 1 Sp 2 Sp 3
Sp 1 Sp 2 Sp 3Sp 0
Spare species; litter should not be a problem over two yearschamber
tube
Enough space for handling the corer by two persons1.2 m
Slope
Water level I
Water level II
Water level III
Total = 15 pots x 3 water levels x 3 replicates = 135 pots, from which only 72 will be analysed!
We would decide to continue for another year looking at some plant-pots. 3 m
1 out of 3 trenches (= replicates) WP 2: Species
WP3: Litter
The water levels in the trenchesThe water levels in the trenchesFosse A
-100
-80
-60
-40
-20
0
0.00 200.00 400.00 600.00 800.00 1000.00 1200.00niveaux zˇro en cm (sommet des piquets-sol)
MIN 2
MAX 2
MEDIANE 21
fosse B
-140-120-100
-80-60-40-20
0
0.00 200.00 400.00 600.00 800.00 1000.00 1200.00 niveaux zˇro en cm (sommetdes piquets-sol)
MIN 2
MAX 2
MEDIANE 2
fosse C
-200
-150
-100
-50
0
0.00 200.00 400.00 600.00 800.00 1000.00 1200.00 niveaux zˇro en cm (sommet des piquets-sol)
MIN 2
MAX 2
MEDIANE 2
Temperature profiles - situation A Temperature profiles - situation A October ‘03 October ‘03
-120
-100
-80
-60
-40
-20
0
20
Dep
th /
cm
5.5 6 6.5 7 7.5 8 8.5 9 9.5 10
Temp. /°C
CA-A6
CA-A5
CA-A4
CA-A3
CA-A2
CA-A1
Temperature profiles - situation BTemperature profiles - situation BOctober ‘03October ‘03
-120
-100
-80
-60
-40
-20
0
20D
epth
/cm
5.5 6 6.5 7 7.5 8 8.5 9 9.5
Temp. /°C
CA-B6
CA-B5
CA-B4
CA-B3
CA-B2
CA-B1
Temperature profiles - situation CTemperature profiles - situation COctober ‘03October ‘03
-120
-100
-80
-60
-40
-20
0
20D
epth
/cm
6 6.5 7 7.5 8 8.5 9 9.5 10
Temp. /°C
CA-C6
CA-C5
CA-C4
CA-C3
CA-C2
CA-C1
Mean temperature profiles - October ‘03Mean temperature profiles - October ‘03
6
6.5
7
7.5
8
8.5
9
9.5
10C
ell
Mea
n f
or T
emp
. /°
C
a b c d e f g h i j k l m
CBA
Depth /cm
Temperature profiles between Mai and Temperature profiles between Mai and June ‘03 at CA-2June ‘03 at CA-2
-160
-140
-120
-100
-80
-60
-40
-20
0
20
Dep
th /
cm
4 6 8 10 12 14 16 18 20 22 24Temp /°C
Group for 5. 6.2003
Group for 16. 5.2003
Temperature profiles between Mai and Temperature profiles between Mai and June ‘03 at CA-6June ‘03 at CA-6
-300
-250
-200
-150
-100
-50
0
50
Dep
th /
cm
2.5 5 7.5 10 12.5 15 17.5 20 22.5 25 27.5Temp /°C
Group for 5. 6.2003
Group for 16. 5.2003
Mean temperatures (ANOVA and Fisher’s Mean temperatures (ANOVA and Fisher’s PLSD) - October ‘03PLSD) - October ‘03
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
Tem
p.
/°C
A B C
a b a/c
Comparisons of the 3 situations in Comparisons of the 3 situations in October ‘03 (ANOVA and Fisher’s PLSD)October ‘03 (ANOVA and Fisher’s PLSD)
a b a/ca ca/b
-22.5
-20
-17.5
-15
-12.5
-10
-7.5
-5
-2.5
0
2.5
WT
dep
th /
cmA B C
3.5
3.6
3.7
3.8
3.9
4
4.1
4.2
4.3
4.4
pH
A B C
Evolution of the pH with depth and sites’ Evolution of the pH with depth and sites’ comparison - Sept.’03comparison - Sept.’03
-50
-45
-40
-35
-30
-25
-20
-15
-10
Dep
th/c
m
4.4 4.5 4.6 4.7 4.8 4.9 5 5.1 5.2pH (sept)
CA5
CA2
Measures of CO2 with depth using Measures of CO2 with depth using peepers - Sept ‘03peepers - Sept ‘03
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
Dep
th/c
m
0 5000 10000 15000 20000 25000 30000 35000ppmv CO2
CA5
CA2
Measures of CH4 with depth using Measures of CH4 with depth using peepers - Sept ‘03peepers - Sept ‘03
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
Dep
th/c
m
-1000 1000 3000 5000 7000 9000ppmv CH4
CA5
CA2
Parallel evolution of CO2 and CH4Parallel evolution of CO2 and CH4
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-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10
Dep
th/c
m
-5000 5000 15000 25000 35000X Variables
ppmv CH4: CA5
ppmv CH4: CA2
ppmv CO2: CA5
ppmv CO2: CA2QuickTime™ et un décompresseur TIFF (LZW) sont requis pour visionner cette image.
CA-5(zone C) CA-2(zone A)
Legend to Amélie’s figuresLegend to Amélie’s figures
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Total « Respiration » - (CHTotal « Respiration » - (CH44 + CO + CO22) /ppmv
-60
-55
-50
-45
-40
-35
-30
-25
-20
-15
-10D
epth
/cm
0 10000 20000 30000 40000Resp. totale
CA5
CA2
Peat sampling - use of a cartridgePeat sampling - use of a cartridge
•PET sheet of 50 cm long, hold in place with a stop-piston, capped at the bottom
•minimise the duration of time at which the anoxic peat can be oxidised
•less manipulations on the field
•makes the transportation easier
•enables to store the samples for some time until they can be processed
•Preparing the cartridges doesn’t take long
Anoxic slicing of coresAnoxic slicing of cores
•Soft gas-chamber that allows to sample in a
O2-free environment
•The advantage is that the bag’s air can be
emptied before filling with N2-gas - it takes
less gas to purge•Easy to make, can be done by all the
dispatchers and could even be used in the
field
•There should be a small N2-flux and we
could use PEWA strips to control if there is
no oxygen left.•Question: 1) Where do we cut the corer? 2)
Do we need to separate the oxic part before
introducing the core into the chamber? Who
needs preserved samples?
Wooden-peepers for gas, cations and Wooden-peepers for gas, cations and anions measurementsanions measurements
•These wooden logs would replace Philipp Steinman’s Plexiglas model
•The wooden-peepers would be inserted where we extract the cores - this would ensure a 1 to 1 wedging
•There would be plastic pots (diam. 50 mm) with a polysulfon membrane (0.2 µm) on two or four sides (depending on the needs)
•The pots can be placed at different depths (0-5, 5-10,…cm), at convenience
•More solution can be retrieved (about 100 ml for one pot) than in the Plexiglas model
•Should be easier to handle
•Question: who does the analyses (PhS, AJF, AS)? (see Philipp’s table)
Fast fluorescence measurements - EC-Fast fluorescence measurements - EC-BERI projectBERI project
The fluorescence transientThe fluorescence transient
from Strasser et al. 2000
from Strasser et al. 2000
Example Eriophorum - BERIExample Eriophorum - BERI
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