Summary of the current status of the work of TUM- BO Scientists: Andreas Gattinger, Michael Schloter Technicians: Franz Buegger (IRMS, plant labelling), Alexandra Hagn, Conny Galonska (DNA) Christine Kollerbaur (Lipids) Voluntary worker (Environmental Protection): Matthias Weiss Technical University of Munich (at the campus of GSF-Research Center for Environment & Health) Chair of Soil Ecology D- 85764 Neuherberg
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Summary of the current status of the work of TUM-BO
Summary of the current status of the work of TUM-BO. Scientists: Andreas Gattinger, Michael Schloter Technicians: Franz Buegger (IRMS, plant labelling), Alexandra Hagn, Conny Galonska (DNA) Christine Kollerbaur (Lipids) Voluntary worker (Environmental Protection): Matthias Weiss - PowerPoint PPT Presentation
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Summary of the current status of the work of TUM-BO
Scientists: Andreas Gattinger, Michael SchloterTechnicians: Franz Buegger (IRMS, plant labelling), Alexandra Hagn, Conny Galonska (DNA) Christine Kollerbaur (Lipids)Voluntary worker (Environmental Protection): Matthias Weiss
Technical University of Munich(at the campus of GSF-Research Center for Environment & Health)Chair of Soil EcologyD- 85764 Neuherberg
1. Extraction and analysis of phospholipid biomarker in peat (bog)
samples (WP 04: D12-D14)
2. Extraction and analysis of DNA in peat (bog) samples (WP 04: D12-
D14)
3. Production of 13C/15N labelled plant litter for field experiment (WP 04:
D13; WP 05: D19)
4. Adaptation of the analytical device GC/MS-c-IRMS for compound
specific isotope analysis (WP3)
5. Socioeconomical appraisal for German peatlands (WP 01: D3)
Summary of the current status of the work of TUM-BO
1. Extraction and analysis of phospholipid biomarker in peat (bog) samples (W P04: D12-D14)
HO
O
CH2
C
O
C
O
O P O
O
O
NH3+
H O
CH2
O
O P O
O
O
NH3+
Archaeal diversityAnalysis of etherlinked isoprenoids (PLEL):- saturated short chain (i20:0): all archaea- saturated long chain (i40:0): all archaea- cyclic long chain (i40:0-cy): Crenarchaeota- unsaturated short chain (i20:1): methanogens
Bacterial & eukaryotic diversityBacterial & eukaryotic diversityAnalysis of Analysis of esterlinked fatty acids (PLFA):- saturated (SATFA): Gram-positives,
to describe bacterial, eukaryotic and archaeal diversity with particular emphasis on methanogenic archaea and methanotrophic bacteria; the following fractions (biomarker) are analysed:
Extraction and analysis of phospholipid biomarker in peat (bog) samples (W P04: D12-D14)
From the peat samples investigated within work programme 1, 208 samples were selected for PLFA analysis; from layer 6 and 8 only duplicate samples were analysed to reduce sample amount for PLFA and DNA analysis (59 from Finland (FI), 40 from France (FR), 46 from Switzerland (CH), 43 from Scotland (SCO), 20 from France (FB))
Problems with solid-phase extraction of the Finnish samples encountered, hence modified extraction procedure has to be applied onto the following peat samples (CH, FR…)
Up to now only the 59 Finnish samples could be analysed: 236 GC/MS runs because of 4 different PLFA fractions, in average 20-30 PLFA compounds per run are to be identified and quantified
3. Production of 13C/15N labelled plant litter for field experiment (WP 04: D13; WP 05: D19)
Production of 13C/15N labelled plant litter from Sphagnum fallax
Sampling in Swiss Jura (Le Creux de l‘Epral) in November 2003; ca 3 m2 Sphagnum carpets
Growth conditionsindirect irrigation (onto cotton fleece) with demin. water, no additional light; 20-250C temperature; 85-95% humidity,
surplus water
box
irrigation
cotton fleece
Production of 13C/15N labelled plant litter from Sphagnum fallax
15N Labellingaquous solution of NH4Cl (99% 15N; 0.1g L-1
m2) was sprayed on Sphagnum carpets prior to 13C labelling
13C Labellingfor 2 month with 13C enriched CO2 (+172%O PDB
= 1.3 atom%) in an air tight tent; prior to labelling ambient CO2 was pumped off; 3-5
labelling pulses per day, when CO2 concentration was below 300 ppm; during the night CO2 was pumped off; average labelling in the tent was between 20 and 60%O PDB
Harvestingonly the upper 2/3 of the plants were harvested
to collect only the (labelled) newly grown parts
Production of 13C/15N labelled plant litter from Eriophorum vaginatum & Eriophorum angustifolium
Nutrient solution and 15N labellinga modified Hoagland solution (pH 5.6) was applied
Nutrients (mg L-1)
13C Labellingfor 2 month with 13C enriched CO2 (+172%O PDB
= 1.3 atom%) in an air tight tent; prior to labelling ambient CO2 was pumped off; 3-5
labelling pulses per day, when CO2 concentration was below 300 ppm; during the night CO2 was pumped off; average labelling in the tent was between 30 and 80%O PDB
Harvestingonly the upper 2/3 of the plant shoots were harvested to collect only the (labelled) newly grown parts, poor growth of E. angustifolium,
which was not harvested
Production of 13C/15N labelled plant litter from Eriophorum vaginatum & Eriophorum angustifolium
Results of 13C labelling
-10
0
10
20
30
40
50
60
d1
3C
(p
er
mil
PD
B)
E. vaginatum(shoots)
+50.2
Stems+Leaves(from 200g dm)
+2.9
Leaves(2x5 plants)
-3.2
Stems (5 plants) +19.1
Capitulum(from 200g dm)
+22.6
Stems (5 plants) +7.8
Yield of labelled biomassSphagnum: 5.5 kg (fresh matter) 0.5 kg (dry matter)E. vaginatum: 50 g (fresh matter) 20 g (dry matter)
SphagnumSphagnum
0,00
2,00
4,00
6,00
8,00
10,00
12,00
14,00
16,00
18,00
d1
5N
(%
)
Stems+Leaves(from 200g dm)
+1.48
Capitulum(from 200g dm)
+1.85 Leaves(2x5 plants)
+1.64
Stems (2x5 plants)+2.25 and +1.77
E. vaginatum(shoots)
+16.9
Results of 15N labelling
SphagnumSphagnum
• labelling in Sphagnum (esp. capitulum) seems to be suffient for field experiment in 2003 for compound specific isotope analysis (13C-PLFA), 13C values in PLFA/PLEL from test core samples varied between -26 and -30 %0 (natural abundance)
• only 1 labelled plant species avaible in sufficient amounts for field experiment in 2003; for getting more labelled Eriophorum plant material, seeds will be purchased and grown in sandy/mineral soil substrate (problems with the hydroponic culture after transplantation!)
• a better homogenisation of the plant litter for 13C studies is required, the use of whole plants is not recommendable, as it leads to high variations
• less variation in 15N among single plants and plant compartments
Conclusions/suggestions from plant labelling
4. Adaptation of the new analytical device GC/MS-c-IRMS for compound specific isotope analysis
Simultaneous identification and quantification of PLFA/PLEL from environmental samples and their corresponding 12C/13C
ratios by GC/MS-C-IRMS
MS(DSQ)
IRMS(DeltaPlusAdvantage)
20% of the analyte
80% of the analyte
13C/12C
-29
-28
-27
-26
-25
-24
-23
-22
-21
ungedüngt mineralisch biologischdynamisch
organischbiologisch
konventionell
Kartoffel Mais
13C measurements of archaeal PLELat the natural abundance level(5 treatments, 4 replicate field plots each)
aa
a
a
b
b b
b a
a
5. Socioeconomical appraisal for peatlands in Germany (WP 01: D3)
• survey was originally planned for this spring but has been postponed to September 2004, because of manpower
• in parallel a German group (among others M. Drösler, University of Bayreuth) is generating a new peatland inventory, as the current data is of poor quality (quite old, patchy, wrong, etc.)
• TUM-BO will use the new basic data on German peatlands, which will be available in autumn 2004 as well as inquiring for the socioeconomics information as suggested in Charquemont 2003