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Assessment of Carbon Seq Potential Batangas City

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Assessment of Carbon Seq Potential Batangas City ASSESSMENT OF THE CARBON SEQUESTRATION POTENTIAL OF MANGROVES IN BATANGAS CITY Terminal Report BUILDING LOW EMISSION ALTERNATIVES TO DEVELOP ECONOMIC RESILIENCE AND SUSTAINABILITY PROJECT (B-LEADERS) January 2017 DISCLAIMER The author’s views expressed in this publication do not necessarily reflect the views of the United States Agency for International Development or the United States Government. This document is intended to comply with Section 508 Standard of the Federal Acquisition Regulation. If you have any difficulties accessing this document, please contact [email protected]. TABLE OF CONTENTS TABLE OF CONTENTS ···················································································· I LIST OF TABLES ························································································· III LIST OF FIGURES ······················································································· III I. EXECUTIVE SUMMARY ····································································· VIV II. INTRODUCTION ·················································································· 1 1.1. Objectives ...................................................................................................................................................... 2 1.2. Scope and Limitations of the Study ........................................................................................................... 2 III. METHODOLOGY ················································································· 3 2.1. Study Site ....................................................................................................................................................... 3 2.2. Sampling Requirement ................................................................................................................................. 4 2.3. Carbon Stock Accounting ........................................................................................................................... 5 2.4. Total Carbon Stock or The Total Ecosystem Carbon Pool .................................................................. 6 2.5. Forest Structure and Composition ............................................................................................................. 6 IV. RESULTS AND DISCUSSION ································································· 7 3.1 Species Composition and Stand Structure................................................................................................. 7 3.1.1 Species Composition ................................................................................................................... 7 3.1.2 Stand Structure............................................................................................................................. 7 3.2 Floristic Diversity .......................................................................................................................................... 8 3.2.1 Site 1 (Sta. Rita and San Lorenzo) ............................................................................................ 9 3.2.2 Site 2 (Cuta, Malitam and Wawa) ............................................................................................ 10 3.2.3 Site 3 (Barangay Tabangao) ..................................................................................................... 11 3.3 Land Cover / Land Use Change ............................................................................................................... 17 3.4 Biomass and Carbon Stock ........................................................................................................................ 18 3.5 Sediment Carbon Stock .............................................................................................................................. 23 3.6 Potential Economic Value of carbon stocks ........................................................................................... 26 3.7 Potential Mangrove Rehabilitation Sites .................................................................................................. 27 V. IMPLICATIONS OF THE STUDY ··························································· 28 VI. CONCLUSION AND RECOMMENDATIONS ··········································· 31 VII. ANNEXES ·························································································· 32 ANNEX 1. Sediment Sampling Activities In Various Mangrove Sites Of Batangas City ........................................................................................................................................................ 33 ANNEX 2. Partial List Of Mangrove Species Identified For Site 2: Barangay Cuta, Malitam And Wawa With Their Iucn Conservation Status, Economic Importance And Threats ................................................................................................................... 34 Annex 3. Partial List Of Mangrove Species Of Barangay Tabangao With Their Iecn Conservtation Status, Economic Importance And Threats ......................................................... 35 ANNEX 4. Research Team ............................................................................................................................. 35 ANNEX 5. Literature Cited ............................................................................................................................. 37 LIST OF TABLES Table 1. Sampling requirement based on identified mangrove sites ............................................................. 4 Table 2. Categories of diversity values ............................................................................................................... 6 Table 3.List of species documented in the area with corresponding frequency .......................................... 7 Table 4. Five species with the highest diameter ................................................................................................ 8 Table 5. Diameter range with corresponding number of individuals ............................................................ 8 Table 6. List of all species in Barangay Sta. Rita with their respective importance values ....................... 12 Table 7. Frequency and Diversity Index of Mangrove Stand of Barangay Sta. Rita ................................. 13 Table 8. List of all species in Site 2: Barangays Cuta, Malitam and Wawa with their respective importance values ................................................................................................................................................ 14 Table 9. Frequency and Diversity Index of Mangrove Stand of Barangay Cuta ....................................... 14 Table 10. Frequency and Diversity Index of Mangrove Stand of Barangay Malitam ............................... 15 Table 11. Frequency and Diversity Index of Mangrove Stand of Barangay Wawa .................................. 15 Table 12. List of all species in Site 3: Barangay Tabangao with their respective importance values ...... 15 Table 13. Frequency and Diversity Index of Mangrove Stand of Barangay Tabangao ............................ 16 Table 14. Land use and land cover area distribution of Batangas City, Philippines across three periods (1997, 2006 and 2016) ......................................................................................................................................... 17 Table 15. Carbon stock capacity of Site 1 (Sta. Rita and San Lorenzo) ...................................................... 18 Table 16. Carbon stock capacity of Site 2 (Cuta, Malitam and Wawa)......................................................... 20 Table 17. Carbon stock capacity of Site 3 (Tabangao) .................................................................................. 21 Table 18. Soil carbon stock of mangrove stands in different barangays in Batangas City ....................... 24 Table 19. Sediment carbon stock of mangrove stands in Site 1(Sta. Rita and San Lorenzo) .................. 24 Table 20. Soil carbon stock of mangrove stands in Barangays Malitam, Cuta and Wawa ....................... 25 Table 21. Soil carbon stock of mangrove stands in Barangay Tabangao .................................................... 25 LIST OF FIGURES Figure 1. Location Map of Batangas City .......................................................................................................... 3 Figure 2. Location Map of the three mangrove sites (Site 1: San Lorenzo and Sta. Rita; Site 2: Malitam, Wawa & Cuta; and Site 3: Tabangao) ................................................................................................ 4 Figure 3. Land use and land cover maps of Batangas City, Philippines based on three observation periods (1997, 2006 and 2016) ........................................................................................................................... 18 Figure 4. Total carbon stock distribution of three mangrove sites in Batangas City, Philippines .......... 22 Figure 5. Total carbon dioxide (ktCO2) storage capacity of Batangas City mangrove forest .................. 23 Figure 6. Potential mangrove rehabilitation sites in Batangas (Source: Google Earth ver. 7.1.2.2019) . 27 I. EXECUTIVE SUMMARY Over the past half century, 50% of the world’s mangrove forest has been exploited despite being a valuable economic resource. Mangrove areas have been converted for urban development, agriculture, shrimp and fish farming, and for salt and rice production to meet
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