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Ability of mangroves to fix atmospheric greenhouse gaz: Case study in Can Gio mangrove, Viet Nam

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Presented by Trương Văn Vinh on 9 November 2020 at "National workshop: Mangrove environmental services payments"

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Ability of mangroves to fix atmospheric greenhouse gaz: Case study in Can Gio mangrove, Viet Nam

  1. 1. Khả năng cố định khí nhà kính của rừng ngập mặn: Nghiên cứu tại rừng ngập mặn Cần Giờ Ability of mangroves to fix atmospheric greenhouse gaz: Case study in Can Gio mangrove, Viet Nam Trương Văn Vinh Khoa Lâm Nghiệp, Trường Đại học Nông Lâm – TP. HCM 1 TP. HCM, ngày 09/11/2020 Email: tvvinh@hcmuaf.edu.vn; ĐT: 0989352208
  2. 2. 2 (Alongi 2014)
  3. 3. 3 Can Gio mangrove forest
  4. 4. ~57 % area 1964 - 1969 665,666 gallons of Agent Orange 343,385 gallons of Agent White 49,200 gallons of Agent Blue since 1978 ~21,000 ha since 1978 ~21,000 ha ~ 32,125 ha 77 mangrove species 35 true mangroves 42 associates Nowadays 4
  5. 5. 5
  6. 6. Mudflat Fringe forest Transition forest Inner forest 118.8 91.7 24.3 150.2157.6118.6 61.9 241.8 157.9 Ecosystem carbon stock 150.2 (Mg C ha-1) 181.9 (Mg C ha-1) 311.5 (Mg C ha-1) 479.2 (Mg C ha-1)
  7. 7. Buried dead trunk of Rhizophora 40 cm Soil surface - MacKenzie et al., (2016) tỷ lệ bồi lắng trung bình: ~0.99 ± 0.09 cm yr-1 7
  8. 8. Total mangrove forest cover 32 126 ha Mudflat 1 413 ha Mix forest 8 617 ha Rhizophora forest 23 508 ha The overall carbon stock of Can Gio ~13.6 Tg C 8
  9. 9. 9 LiCOR-8100 A
  10. 10. 10 LiCOR-840A LiCOR-820 (1) (2) (3)
  11. 11. 11 168 mmol CO2m-2d-1 78 mmol CO2m-2d-1 Triều cao 266 mmol CO2m-2d-1 Triều thấp - 168.5 (Lovelock et al., 2014) - 88.6 (Lang’at et al., 2014) - 80.5 (Leopold et al., 2014) - 65.5 (Grellier et al., 2014)
  12. 12. 12
  13. 13. 13 Vertical CO2 concentrations profiles in the canopy Heightaboveground(m)
  14. 14. 14 Eddy-Covariance System on river
  15. 15. 15 Eddy-Covariance System in Rhizophora forest
  16. 16. 16
  17. 17. 17 January February March April May DecemberNovemberOctober AugustJulyJune September Observation data in 5 years (2016 – 2020)
  18. 18. 18 T0C H (%) Net Ecosystem Exchange (μmolm-2s-1)
  19. 19. 19 Net Ecosystem Exchange CO2
  20. 20. 20 Net Ecosystem Exchange CO2 2/6/2017 16/6/2017
  21. 21. 21 Daily sum of Net Ecosystem Exchange CO2 (gram Carbon/m2/day)
  22. 22. 22(Leopold 2016) Where is the Net Ecosystem Production (NEP) of Can Gio Mangrove Forest, Tropical, planted mangrove (Rhizophora)???
  23. 23. 23 Xin chân thành cảm ơn! CHƯƠNG TRÌNH TRỒNG RỪNG NGẬP MẶN TẠI TX. VĨNH CHÂU, SÓC TRĂNG (2020 -2028)

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