National REDD+ System Philippines Forest Land Use Planning And
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Technical Cooperation with the Philippines Department of Environment and Natural Resources (DENR) National REDD+ System Philippines Component 4: Forest Land Use Planning and REDD+ Implementation in Selected Areas PN 12.9022.0-001.00 / VN 81162755 Methodology and Results of the 2014 - 2015 Forest Resources Assessment in the selected Project sites in Eastern Samar February 2016 Ralph LENNERTZ National REDD+ System Philippines Project Deutsche Forstservice GmbH Component 4 implemented on behalf of Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH National REDD+ System Philippines Project Deutsche Forstservice GmbH Component 4 implemented on behalf of Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH Eastern Samar FRA Results i TABLE OF CONTENT TABLE OF CONTENT ............................................................................................................. i ANNEXES ............................................................................................................................. iii TABLES ................................................................................................................................ iv FIGURES ............................................................................................................................... v ACRONYMS ......................................................................................................................... vi EXECUTIVE SUMMARY ........................................................................................................ 1 1. INTRODUCTION AND BACKGROUND .......................................................................... 2 1.1 National REDD+ System Philippines Project .......................................................... 2 1.2 Methodological Framework ..................................................................................... 3 1.3 Forest Resources Assessment Objectives, Scale and Scope ................................. 3 2. SOURCES OF INFORMATION ....................................................................................... 6 2.1 Forest Definition ..................................................................................................... 6 2.2 Forest Areas / Stratification .................................................................................... 6 2.3 Carbon Stocks in Mangroves .................................................................................. 8 2.4 Wood Specific Gravity ............................................................................................ 8 2.5 Soil Classes............................................................................................................ 8 3. INVENTORY DESIGN ................................................................................................... 10 3.1 Inventory Method .................................................................................................. 10 3.2 Areal Sampling Frame .......................................................................................... 10 3.3 Elements Sampled ............................................................................................... 10 3.4 Number of Sample Points ..................................................................................... 11 3.5 Distribution of Sample Points ................................................................................ 11 3.6 Configuration of Sampling Units ........................................................................... 11 3.6.1 Observations and measurements at and around the Sample Points ......... 14 3.6.2 Observations and measurements at and around the Satellite Centers ...... 14 3.7 Estimation Design ................................................................................................ 16 3.7.1 Tree volume equations and calculation of merchantable volume............... 16 3.7.2 Allometric equations and calculation of biomass ....................................... 16 3.7.3 Carbon fraction of dry matter ..................................................................... 19 3.7.4 Statistical parameters ................................................................................ 20 4. FIELD IMPLEMENTATION ............................................................................................ 21 4.1 Retrieval and Permanent Marking of Sampling Units ............................................ 21 4.1.1 Approach of Sample Points using GPS receivers ...................................... 21 4.1.2 Location of Sample Points and Satellite Centers using compass and distance tape or laser rangefinder ............................................................. 22 National REDD+ System Philippines Project Eastern Samar FRA Results ii 4.1.3 Permanent marking of Sample Points and Satellite Centers ..................... 22 4.1.4 Inaccessible Sample Points and Satellite Centers ..................................... 22 4.2 Variables of Interest Assessed / Measured ........................................................... 24 4.2.1 Administrative location .............................................................................. 24 4.2.2 Actual coordinates..................................................................................... 24 4.2.3 Elevation ................................................................................................... 24 4.2.4 Slope......................................................................................................... 24 4.2.5 Slope orientation ....................................................................................... 24 4.2.6 Terrain ...................................................................................................... 24 4.2.7 Land classification ..................................................................................... 25 4.2.8 Land cover ................................................................................................ 25 4.2.9 Forest type ................................................................................................ 26 4.2.10 Tree crown cover ...................................................................................... 26 4.2.11 Plant diversity ............................................................................................ 26 4.2.12 Ground coverage classes by vegetation layers ......................................... 27 4.2.13 Ground coverage and average depth of litter ............................................ 27 4.2.14 Mid-diameter and length of lying dead wood sections ............................... 27 4.2.15 Observations / measurements on live trees and standing dead wood ....... 28 5. ORGANIZATIONAL ASPECTS ..................................................................................... 32 5.1 Inventory Instructions and Field Data Forms......................................................... 32 5.2 Inventory Teams ................................................................................................... 32 5.3 Inventory Equipment ............................................................................................. 33 5.4 Training ................................................................................................................ 33 5.5 Inventory Camps .................................................................................................. 34 5.6 Time and Costs of the Field Work ......................................................................... 34 5.7 Data Processing and Analysis .............................................................................. 36 6. QUALITY ASSURANCE / QUALITY CONTROL ............................................................ 37 6.1 Quality Assurance ................................................................................................ 37 6.2 Quality Control ...................................................................................................... 37 7. DETAILED RESULTS OF THE FOREST RESOURCES ASSESSMENT ...................... 39 7.1 Species Diversity .................................................................................................. 39 7.1.1 Species diversity of Closed Forests .......................................................... 39 7.1.2 Species diversity of Open Forests ............................................................. 41 7.2 Stand Composition ............................................................................................... 44 7.2.1 Stand composition of Closed Forests ........................................................ 44 7.2.2 Stand composition of Open Forests .......................................................... 46 7.3 Stand Structure .................................................................................................... 48 7.3.1 Stand structure of Closed Forests ............................................................. 48 7.3.2 Stand structure of Open Forests ............................................................... 54 7.4 Timber Stocks ...................................................................................................... 60 National REDD+ System Philippines Project Eastern Samar FRA Results iii 7.4.1 Timber stocks of Closed Forests ............................................................... 60 7.4.2 Timber stocks of Open Forests ................................................................. 62 7.5 Carbon Stocks .....................................................................................................