GIS-based intepolation methods for soil CO_1tn2 respiration data in a temperate decidious forest [Elektronische Ressource] / vorgelegt von Albrecht Jordan

Albrecht Jordan

Sujets

• Biologie

Informations

• Publié par: universitat_rostock
• Publié le: 01 janvier 2010
• Nombre de lectures: 31
• Langue: Deutsch
• Poids de l'ouvrage: 9 Mo

Extrait

Aus dem Institut für Management ländlicher Räume
der Agrar- und Umweltwissenschaftlichen Fakultät









GIS-based interpolation methods for soil CO respiration data in 2
a temperate deciduous forest






Dissertation
zur Erlangung des akademischen Grades
doctor agriculturae (Dr. agr.)
an der Agrar- und Umweltwissenschaftlichen Fakultät
der Universität Rostock





vorgelegt von
Dipl. Umweltwiss. Albrecht Jordan
aus Göttingen

Rostock, 01. Februar 2010 Gutachter:

Prof. Dr. Stephan Glatzel:
Professur für Landschaftsökologie und Standortkunde, Institut für Management ländlicher
Räume, Agrar- und Umweltwissenschaftliche Fakultät, Universität Rostock

Prof. Dr.-Ing. Ralf Bill:
Professur für Geodäsie und Geoinformatik, Institut für Management ländlicher Räume, Agrar-
und Umweltwissenschaftliche Fakultät, Universität Rostock

PD Dr. Gerd Gleixner:
Abteilung für Biogeochemische Prozesse, Max-Planck-Institut für Biogeochemie, Jena

PD Dr. Hermann Jungkunst:
Abteilung Landschaftsökologie, Geographisches Institut, Fakultät für Geowissenschaften und
Geographie, Universität Göttingen

















Tag der Verteidigung: 15. Juni 2010 in Rostock
2Table of contents
1. Introduction........................................................................................................................ 6
1.1 Motivation.......................................................................................................... 6
1.2 Current state of research..................................................................................... 7
1.3 Main objectives and hypothesis of this study..................................................... 9
1.4 The “Hainich” project ...................................................................................... 10
2. Materials and methods..................................................................................................... 12
2.1 Site description................................................................................................. 12
2.1.1 Geography........................................................................................................ 12
2.1.2 Geology and general soil characteristics.......................................................... 13
2.1.3 Climate and hydrology..................................................................................... 14
2.1.4 Vegetation 15
2.1.5 Land use history ............................................................................................... 17
2.2 Sampling design 20
2.2.1 The nested series .............................................................................................. 20
2.2.2 The random series............................................................................................ 20
2.3 Sampling procedures........................................................................................ 21
3. Small scale spatial heterogeneity of soil respiration ........................................................ 24
3.1 Methods............................................................................................................ 24
3.1.1 Statistical analysis and calculations ................................................................. 24
3.2 Results.............................................................................................................. 30
3.2.1 Seasonal variation of soil respiration ............................................................... 30
3.3 Spatial distribution........................................................................................... 35
3.3.1 Hydrological gradient & spatial trends ............................................................ 35
3.3.2 Outlier analysis................................................................................................. 38
3.3.3 Number of measurement locations required .................................................... 40
3.3.4 Kriging preparation.......................................................................................... 41
3.3.5 Semivariograms................................................................................................ 41
3.3.6 Maps of soil respiration.................................................................................... 46
3.3.7 Maps of soil respiration incorporating soil moisture and temperature............. 46
4. Fine root biomass of trees as a predictor of root respiration............................................ 49
4.1 Materials and methods..................................................................................... 50
4.1.1 Surveying and mapping of trees....................................................................... 50
4.1.2 Calculating point specific potential relative fine root biomass ........................ 50
34.1.3 Calculating area-wide potential relative fine root biomass.............................. 53
4.1.4 Model validation.............................................................................................. 54
4.1.5 Statistical analysis & Regression kriging......................................................... 55
4.2 Results.............................................................................................................. 58
4.2.1 Validation results 58
4.2.2 Stand structure parameters ............................................................................... 58
4.2.3 Calculated point specific potential fine root biomass ...................................... 59
4.2.4 Correlations between potential fine root biomass and soil respiration at
different seasons............................................................................................... 60
4.2.5 Maps of seasonal ash root respiration .............................................................. 62
5. Discussion........................................................................................................................ 65
5.1 Small scale spatial heterogeneity of soil respiration ........................................ 65
5.1.1 The influence of soil temperature..................................................................... 65
5.1.2 The influence of soil moisture.......................................................................... 65
5.1.3 Spatial heterogeneity of soil respiration........................................................... 66
5.1.4 Optimizing the parameters for interpolation .................................................... 68
5.1.5 Interpolated maps............................................................................................. 69
5.1.6 The standardisation approach........................................................................... 70
5.2 Fine root biomass of trees as a predictor of soil respiration............................. 71
5.2.1 Limitations....................................................................................................... 71
5.2.2 Spatial patterns................................................................................................. 71
5.2.3 Seasonal patterns.............................................................................................. 72
5.2.4 Microbial and physical controls ....................................................................... 72
5.2.5 Synthesis........................................................................................................... 73
6. Conclusion........................................................................................................................ 75
7. Summary.......................................................................................................................... 76
8. Zusammenfassung............................................................................................................ 78
9. References...... 80
10. List of abbreviations......................................................................................................... 91
11. List of tables ..................................................................................................................... 93
12. List of figures....... 94
13. Appendix.......................................................................................................................... 97
13.1 Soil respiration data.......................................................................................... 97
13.2 Soil moisture data........................................................................................... 111
413.3 Soil temperature data...................................................................................... 121
13.4 Semivariograms of soil respiration measurements......................................... 131
13.5 Java application – Source code ...................................................................... 144
13.6 Potential relative fine root distribution patterns of different tree species ...... 150
14. Declaration.........................