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Technical Report: Results of Forest Carbon Assessment and Monitoring

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Technical Report: Results of Forest Carbon Assessment and Monitoring Table of Contents List of acronyms ................................................................................................................................. iv Participants......................................................................................................................................... v List of tables ..................................................................................................................................... vii List of figures ................................................................................................................................... viii Acknowledgements ........................................................................................................................... ix Summary ............................................................................................................................................ x 1 Introduction ................................................................................................................................1 2 Study area ...................................................................................................................................2 2.1 General information ............................................................................................................2 2.2 Description of the transect locations ...................................................................................2 2.3 Description of the measurement plots .................................................................................3 2.4 Tree species botanical and vernacular names ......................................................................3 3 Methodology ..............................................................................................................................5 3.1 Sampling design...................................................................................................................5 3.1.1 Permanent sample plot: shape and size .......................................................................5 3.1.2 3m x 3m-quadrats for destructive sampling .................................................................6 3.1.3 Slope correction ...........................................................................................................7 3.2 Measurements ....................................................................................................................8 3.2.1 Aboveground Biomass (AGB) .......................................................................................8 3.2.2 Belowground Biomass (BGB) ...................................................................................... 10 3.2.3 Dead Organic Matter (DOM) ...................................................................................... 10 3.2.4 Soil Organic Carbon (S0C) ........................................................................................... 11 3.2.5 Vegetation height ...................................................................................................... 11 3.3 Biomass calculations .......................................................................................................... 12 3.3.1 Data quality ............................................................................................................... 12 3.3.2 Aboveground tree biomass ........................................................................................ 12 3.3.3 Belowground tree biomass ........................................................................................ 12 3.3.4 Woody palm biomass ................................................................................................. 12 3.3.5 Liana biomass ............................................................................................................ 13 3.3.6 Standing dead wood .................................................................................................. 13 3.3.7 Understory vegetation and litter ................................................................................ 13 3.3.8 Carbon content .......................................................................................................... 13 3.3.9 Soil Organic Carbon (SOC) .......................................................................................... 13 i 4 Results ...................................................................................................................................... 15 4.1 Biomass ............................................................................................................................. 15 4.1.1 Trees.......................................................................................................................... 15 4.1.2 Woody palms ............................................................................................................. 19 4.1.3 Lianas ........................................................................................................................ 19 4.1.4 Understory vegetation ............................................................................................... 20 4.1.5 Contribution of the different components to the AGB ................................................ 21 4.2 Dead Organic Matter (DOM) .............................................................................................. 22 4.2.1 Standing Dead Wood (DW) ........................................................................................ 22 4.2.2 Coarse Litter (CL) ....................................................................................................... 22 4.2.3 Fine Litter (FL) ............................................................................................................ 23 4.3 Soil Organic Carbon (SOC) .................................................................................................. 23 4.4 Total Carbon Stock (TCS) .................................................................................................... 25 4.5 General remarks about the efficiency of the plot design .................................................... 26 5 Discussion and recommendations ............................................................................................. 28 5.1 Recommendation on efficient inventory design ................................................................. 28 5.1.1 Towards a national biomass monitoring system ......................................................... 28 5.1.2 Sampling design ......................................................................................................... 28 5.1.3 Sampling scheme ....................................................................................................... 30 5.2 Identification of “key”-components ................................................................................... 30 5.3 Measurement protocol ...................................................................................................... 31 5.4 Allometry and tree species identification ........................................................................... 31 6 Conclusion ................................................................................................................................ 34 7 References ................................................................................................................................ 35 Annex 1: Description of the measurement plots................................................................................ 38 Annex 2: Stand variables per measurement plot ............................................................................... 40 Annex 3: Dominant species per measurement plot ........................................................................... 41 Annex 4: Biomass for trees with dbh [5,20cm[ per measurement plot............................................... 43 Annex 5: Biomass for trees with dbh ≥20cm per measurement plot .................................................. 44 Annex 6: C stored in woody palms per measurement plot................................................................. 45 Annex 7: C stored in lianas per measurement plot ............................................................................ 46 Annex 8: C stored in the understory per measurement plot .............................................................. 47 Annex 9: Dry weight and C stored in standing DW dbh ≥ 5cm per measurement plot ........................ 48 Annex 10: Dry weight and C stored in CL per measurement plot ....................................................... 49 Annex 11: Dry weight and C stored in FL per measurement plot ....................................................... 50 Annex 12: Average SOC per measurement plot (depth 0-30cm) ........................................................ 51 Annex 13: Tree species list ................................................................................................................ 52 Annex 14: Measurement protocol for the permanent plots .............................................................. 68 Annex 15: Measurement protocol for the 3mx3m quadrats .............................................................. 77 List of acronyms AGB Aboveground Biomass BBS National Herbarium in Suriname BGB Belowground Biomass C Carbon CBN Capacity Building Fund for Forest and Nature Sector CL Coarse Litter CO2 Carbon dioxide CELOS Center for Agricultural Research
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