Functional soil organic matter pools and soil organic carbon stocks in grasslands: an ecosystem perspective
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Leipzig
Helmholtz Centre for Environmental Research, UFZ
2011
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| Schriftenreihe: | PhD dissertation
2011,15 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XIV, 116 S. Ill., graph. Darst. |
Internformat
MARC
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Datensatz im Suchindex
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| adam_text | Titel: Functional soil organic matter pools and soil organic carbon stocks in grasslands
Autor: Breulmann, Marc
Jahr: 2011
Contents
Contents
Contents......................................................................................................................................I
List of Tables............................................................................................................................V
List of Figures.......................................................................................................................VII
List of Abbreviations...............................................................................................................X
Kurzzusammenfassung.......................................................................................................XIII
Abstract................................................................................................................................XIV
Extended Summary..................................................................................................................1
1. General Introduction.......................................................................................................3
1.1 Carbon sequestration in terrestrial ecosystems..........................................................3
1.2 Dynamics of soil organic matter: Functional SOM pools and SOM stabilisation.....4
1.3 SOM, a substrate for soil microorganisms and plant - soil feedback loops...............7
2. BIOLOG - Europe Programme: The DIVA subproject..............................................8
3. Main aims of this thesis....................................................................................................9
4. Study area and sampling design...................................................................................12
4.1 Site description.........................................................................................................12
4.2 Experimental and sampling design..........................................................................13
5. General Methods............................................................................................................13
5.1 General soil and vegetation analysis........................................................................13
5.2 Fractionation approaches to identify functional SOM pools...................................14
5.2.1 Hot water extractable C and N........................................................................14
5.2.2 Particle size and density fractionation.............................................................14
5.2.3 Soil microbial biomass.....................................................................................15
5.3 Soil enzyme activities...............................................................................................16
5.4 N mineralisation.......................................................................................................16
5.5 Decomposition experiments.....................................................................................16
5.6 Stable isotope analyses.............................................................................................17
5.7 Radiocarbon measurements......................................................................................17
6. General Results and Discussion....................................................................................17
6.1 Relationships between abiotic factors, the composition of plant communities and
the soil food web {Chapter 1)..................................................................................18
6.2 Functional SOM pools: SOC stocks and stability indicators {Chapter 2)...............20
6.3 Bioavailability of OC in functional SOM pools {Chapter 3)...................................22
7. Final Conclusions...........................................................................................................24
References...............................................................................................................................26
Contents
Chapter 1 Impact of the composition of the plant community on labile soil organic
carbon and soil food webs in semi-natural grassland ecosystems of different productivity
Abstract...................................................................................................................................34
Keywords.................................................................................................................................34
1. Introduction....................................................................................................................35
2. Materials and Methods..................................................................................................37
2.1 Study area and plot description................................................................................37
2.2 Soil and vegetation analysis.....................................................................................37
2.3 Litter decomposition experiment.............................................................................38
2.4 Hot water extractable C and N.................................................................................38
2.5 Soil enzyme activities...............................................................................................39
2.6 PLFA analysis..........................................................................................................39
2.7 Data analysis............................................................................................................40
3. Results.............................................................................................................................42
3.1 Decomposition of plant litter....................................................................................42
3.2 Labile soil C and N fraction.....................................................................................42
3.3 Soil microbial properties..........................................................................................44
3.4 Relation between environmental factors and microbial parameters........................45
4. Discussion........................................................................................................................46
4.1 The decomposability of plant litter and its effect on labile soil C and N.................46
4.2 Soil microbial components.......................................................................................48
4.3 Relation between environmental factors and microbial parameters........................49
4.4 Conclusions..............................................................................................................50
Acknowledgments...................................................................................................................51
References...............................................................................................................................52
Supplementary Materials......................................................................................................56
Chapter 2 Stability and stocks of organic carbon in functional SOM pools through the
soil profile of semi-natural grassland ecosystems
Abstract...................................................................................................................................60
Keywords.................................................................................................................................60
1. Introduction....................................................................................................................61
2. Materials and Methods..................................................................................................63
2.1 Site description.........................................................................................................63
2.2 Sampling...................................................................................................................63
2.3 Elemental analysis....................................................................................................64
2.4 Calculation of C stocks and carbon enrichment factors (Esoc)................................65
2.5 Size-density fractionation.........................................................................................65
II
Contents
2.6 Hot water extractable C and N.................................................................................66
2.7 Isotope analyses........................................................................................................66
2.8 Data analysis............................................................................................................66
3. Results.............................................................................................................................67
3.1 SOC stocks...............................................................................................................67
3.2 Carbon enrichment factors (ESoc)............................................................................69
3.3 Factors influencing SOC stocks...............................................................................69
3.4 Hot water extractability of OC in functional SOM pools (CHWE-fraction)..................70
3.5 l3C isotopic abundance of functional SOM pools and bulk soil related to the Chwe
percentage from SOC...............................................................................................70
4. Discussion........................................................................................................................71
4.1 SOC stocks andC enrichment factors (Esoc)..........................................................71
4.2 Factors influencing SOC stocks...............................................................................74
4.3 Stability of functional SOM pools...........................................................................74
4.4 Conclusions..............................................................................................................76
Acknowledgments...................................................................................................................77
References...............................................................................................................................77
Supplementary Materials......................................................................................................81
Chapter 3 Microbial utilisation of functional SOM pools in grassland ecosystems
Abstract...................................................................................................................................84
Keywords.................................................................................................................................84
1. Introduction....................................................................................................................85
2. Materials and Methods..................................................................................................86
2.1 Study sites................................................................................................................86
2.2 Soil and vegetation analysis.....................................................................................87
2.3 Size-density fractionation.........................................................................................87
2.4 Utilisation of functional SOM pools........................................................................88
2.5 Microbial community...............................................................................................90
2.6 Microbial activity.....................................................................................................90
2.7 Statistical analyses....................................................................................................91
3. Results.............................................................................................................................92
3.1 Decomposition of functional SOM pools.................................................................92
3.2 Soil microbial properties..........................................................................................92
3.2.1 Start of the incubation experiment...................................................................93
3.2.2 End of the incubation experiment.....................................................................93
3.2.3 Change of microbial properties during utilisation of functional SOM pools.. 95
4. Discussion........................................................................................................................97
4.1 Functional SOM pools isolated by particle size.......................................................97
III
Contents
4.2 Functional SOM pools isolated by specific density.................................................99
4.3 Conclusions............................................................................................................100
Acknowledgments.................................................................................................................101
References.............................................................................................................................101
Supplementary Materials....................................................................................................105
Acknowledgments.................................................................................................................110
Curriculum Vitae.................................................................................................................Ill
Declaration............................................................................................................................112
Erklärung..............................................................................................................................112
List of Publications...............................................................................................................113
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| spelling | Breulmann, Marc 1982- Verfasser (DE-588)1020049219 aut Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective von Marc Breulmann Leipzig Helmholtz Centre for Environmental Research, UFZ 2011 XIV, 116 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier PhD dissertation 2011,15 Zugl.: Hannover, Univ., Diss., 2011 Humus (DE-588)4160800-8 gnd rswk-swf Grünland (DE-588)4158359-0 gnd rswk-swf Ökosystem (DE-588)4043216-6 gnd rswk-swf Kohlenstoffgehalt (DE-588)4370378-1 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Grünland (DE-588)4158359-0 s Humus (DE-588)4160800-8 s Kohlenstoffgehalt (DE-588)4370378-1 s Ökosystem (DE-588)4043216-6 s DE-604 PhD dissertation 2011,15 (DE-604)BV035421074 2011,15 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025012508&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Breulmann, Marc 1982- Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective PhD dissertation Humus (DE-588)4160800-8 gnd Grünland (DE-588)4158359-0 gnd Ökosystem (DE-588)4043216-6 gnd Kohlenstoffgehalt (DE-588)4370378-1 gnd |
| subject_GND | (DE-588)4160800-8 (DE-588)4158359-0 (DE-588)4043216-6 (DE-588)4370378-1 (DE-588)4113937-9 |
| title | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective |
| title_auth | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective |
| title_exact_search | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective |
| title_full | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective von Marc Breulmann |
| title_fullStr | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective von Marc Breulmann |
| title_full_unstemmed | Functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective von Marc Breulmann |
| title_short | Functional soil organic matter pools and soil organic carbon stocks in grasslands |
| title_sort | functional soil organic matter pools and soil organic carbon stocks in grasslands an ecosystem perspective |
| title_sub | an ecosystem perspective |
| topic | Humus (DE-588)4160800-8 gnd Grünland (DE-588)4158359-0 gnd Ökosystem (DE-588)4043216-6 gnd Kohlenstoffgehalt (DE-588)4370378-1 gnd |
| topic_facet | Humus Grünland Ökosystem Kohlenstoffgehalt Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025012508&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
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