Ecosystem functions of tidal marsh soils of the Elbe estuary:
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| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Hamburg
Verein zur Förderung der Bodenkunde in Hamburg
2015
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| Schriftenreihe: | Hamburger bodenkundliche Arbeiten
Band 76 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XX, 161 Seiten Illustrationen |
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Datensatz im Suchindex
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Titel: Ecosystem functions of tidal marsh soils of the Elbe estuary
Autor: Hansen, Kerstin
Jahr: 2015
Contents
Summary.VII
Zusammenfassung.XI
List of Figures.XV
List of Tables.XVI
List of Abbreviations Symbols.XVII
List of Definitions.XIX
1 Introduction Objectives.1
2 Background.5
2.1 Ecosystem functions of tidal marsh soils.5
2.2 Marsh soils as part of the regional carbon cycle.5
2.2.1 Organic carbon sources and pools.5
2.2.2 Organic carbon turnover.8
2.3 Marsh soils as sinks for trace metals.10
2.3.1 Factors influencing trace metal retention and mobilization.10
2.3.2 Contamination of the river Elbe, its sediments, and soils.12
3 Study area.15
3.1 The Elbe estuary.15
3.2 Landscape formation.15
3.3 Anthropogenic changes.17
3.3.1 Coastal protection.17
3.3.2 River-engineering measures.18
3.3.3 Climate change.19
3.4 Study sites.20
3.4.1 Site description.20
3.4.2 Soils of the study sites.24
4 Material Methods.31
4.1 Field methods and sample preparation.31
4.2 Soil analysis.32
4.2.1 Bulk density.32
4.2.2 Grain size distribution.33
4.2.3 pH.33
4.2.4 Carbon.33
4.2.5 ,3C/,2C isotope ratios.34
III
4.2.6 Aqua regia extraction.34
4.2.7 Element analysis.35
4.3 Incubation experiment on carbon turnover.35
4.3.1 Soil sampling and sample preparation.35
4.3.2 Gas measurements.36
4.4 External data.37
4.5 Data analysis and calculations.37
4.5.1 Calculation of SOC and trace metal pools.37
4.5.2 Differentiation of autochthonous and allochthonous SOC.38
4.5.3 Calculation of CO2 and CH4 production and estimation of potential carbon turnover.40
4.5.4 Classification of contamination levels.42
4.5.5 Age determination of soil horizons.43
4.5.6 Up-scaling.43
4.5.7 Statistics.44
5 Results.47
5.1 Soil characteristics and properties.47
5.1.1 Bulk density, texture, and pH.47
5.1.2 TOC and TIC concentrations.48
5.1.3 TN concentrations and C/N ratios.49
5.1.4 Trace metal concentrations.50
5.2 Above-ground biomass.53
5.3 Organic carbon.54
5.3.1 Differentiation of SOC pools.54
5.3.2 Vertical TOC distribution in soils and their allochthonous proportion.55
5.3.3 Comparison between initial and recent OC pools.58
5.3.4 Carbon isotope ratios of soils, sediment, and biomass.58
5.3.5 Spatial distribution of SOC stocks.59
5.4 Aerobic and anaerobic carbon turnover.60
5.4.1 Soil characteristics of incubated samples.60
5.4.2 Cumulative gas production.61
5.4.3 Carbon mineralization rates.64
5.4.3.1 Maximum mineralization rates.64
5.4.3.2 Comparison of initial and final rates.65
5.4.4 Total carbon turnover.66
5.5 Trace metals.68
IV
5.5.1 Differentiation of trace metal pools and stocks.68
5.5.2 Estimation of contamination level.71
5.5.3 Trace metals in suspended sediments.74
5.5.4 Comparison between suspended sediments and soils.76
6 Discussion.81
6.1 Organic carbon in tidal marsh soils and suspended sediments.81
6.1.1 Impact of allochthonous and autochthonous OC deposition.81
6.1.2 Factors influencing SOC pools of tidal marshes.82
6.1.2.1 Biomass production and litter redistribution.82
6.1.2.2 Decomposition.83
6.1.3 SOC storage in tidal marshes.84
6.2 Organic carbon turnover in tidal marsh soils.85
6.2.1 Potential dccomposability of soil carbon.85
6.2.1.1 Influence of oxygen availability.85
6.2.1.2 Influence of C quantity and quality.87
6.2.2 Dissolution of soil carbon.90
6.2.3 Methodological limitations.91
6.2.3.1 Experimental bias due to sample preparation.91
6.2.3.2 Experimental bias due to flushing.91
6.2.3.3 Transferability of results to field conditions.92
6.3 Trace metals in tidal marsh soils and suspended sediments.94
6.3.1 Factors influencing trace metal concentrations.94
6.3.1.1 Determination of metal distribution along cstuarinc gradients.94
6.3.1.2 Role of retention and mobilization processes.95
6.3.2 Evaluation of contamination levels.98
6.3.3 Estimation of sedimentation period from vertical trace metal distributions.101
6.3.3.1 Temporal variations of trace metal concentrations in suspended sediments.101
6.3.3.2 Age determination of soil horizons.102
6.3.3.3 Evaluation of the dating method.105
7 Conclusions.109
8 Oudook.113
References.117
Appendix.133
Acknowledgements.161
V |
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| spelling | Hansen, Kerstin Verfasser aut Ecosystem functions of tidal marsh soils of the Elbe estuary vorgelegt von Kerstin Hansen Hamburg Verein zur Förderung der Bodenkunde in Hamburg 2015 XX, 161 Seiten Illustrationen txt rdacontent n rdamedia nc rdacarrier Hamburger bodenkundliche Arbeiten Band 76 Dissertation Universität Hamburg 2015 Ökosystemdienstleistung (DE-588)7583382-7 gnd rswk-swf Seemarsch (DE-588)4206569-0 gnd rswk-swf Elbtal (DE-588)4092476-2 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Elbtal (DE-588)4092476-2 g Seemarsch (DE-588)4206569-0 s Ökosystemdienstleistung (DE-588)7583382-7 s DE-604 Hamburger bodenkundliche Arbeiten Band 76 (DE-604)BV000019547 76 HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=028371312&sequence=000004&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Hansen, Kerstin Ecosystem functions of tidal marsh soils of the Elbe estuary Hamburger bodenkundliche Arbeiten Ökosystemdienstleistung (DE-588)7583382-7 gnd Seemarsch (DE-588)4206569-0 gnd |
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| title | Ecosystem functions of tidal marsh soils of the Elbe estuary |
| title_auth | Ecosystem functions of tidal marsh soils of the Elbe estuary |
| title_exact_search | Ecosystem functions of tidal marsh soils of the Elbe estuary |
| title_full | Ecosystem functions of tidal marsh soils of the Elbe estuary vorgelegt von Kerstin Hansen |
| title_fullStr | Ecosystem functions of tidal marsh soils of the Elbe estuary vorgelegt von Kerstin Hansen |
| title_full_unstemmed | Ecosystem functions of tidal marsh soils of the Elbe estuary vorgelegt von Kerstin Hansen |
| title_short | Ecosystem functions of tidal marsh soils of the Elbe estuary |
| title_sort | ecosystem functions of tidal marsh soils of the elbe estuary |
| topic | Ökosystemdienstleistung (DE-588)7583382-7 gnd Seemarsch (DE-588)4206569-0 gnd |
| topic_facet | Ökosystemdienstleistung Seemarsch Elbtal Hochschulschrift |
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