Universal Journal of Agricultural Research Vol. 10(1), pp. 1 - 19
DOI: 10.13189/ujar.2022.100101
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Ecosystem Carbon Stocks of Restored Mangroves and Its Sequestration in Northern Sumatra Coast, Indonesia


Bambang Suprayogi 1,*, J. Purbopuspito 2, Meilinda Suriani Harefa 3, G.Y. Panjaitan 4, Z. Nasution 5
1 Faculty of Fishery and Marine Science, Brawijaya University, Malang, Indonesia
2 Department of Soil, Faculty of Agriculture, Sam Ratulangi University, Menado, Indonesia
3 Department of Geography, Faculty of Social Sciences, Universitas Negeri Medan, Medan, Indonesia
4 Yagasu Aceh Foundation, Medan, Indonesia
5 Department of Biology, Universitas Sumatera Utara, Medan, Indonesia

ABSTRACT

The 2, 4, 6, 8, 10, 12 and 30-year restored mangroves were studied through non-destructive method by measuring their stem diameter and tree height. Two allometric references: (a) stem diameter (D30) and (b) combined quadratic stem diameter and tree height (D302H) were used to estimate aboveground and belowground vegetation carbon stocks. The soil samples were collected from different depth and analysed in laboratory for soil carbon. The objective of this study was to estimate ecosystem carbon stocks of restored mangroves and its sequestration. The growth of restored mangroves induced an increase of tree biomass and a corresponding increase in vegetation carbon stocks from 3.7 MgC ha-1 at 2-year to 136.8 MgC ha-1 at 30-years. However, soil carbon stocks among restored mangrove plots spread randomly and didn't follow the sequence of mangrove tree ages. Average (2-30 years) mangrove ecosystem carbon in Northern Sumatra estimated by D302H allometry (362.0 MgC ha-1) was higher than that estimated by D30 allometry (344.1 MgC ha-1). This higher trend was also followed by its carbon sequestration with values of 41.1 MgCO2e ha-1 yr-1 estimated by D302H allometry and 31.5 MgCO2e ha-1 yr-1 estimated by D30 allometry. It is concluded that the values of ecosystem carbon stock of restored mangroves and its sequestration estimated by combined quadratic stem diameter and tree height (D302H) are higher than if it is estimated by stem diameter (D30). The D302H value is higher because this allometry calculates the volume of the tree stem, while D30 allometry only calculates the surface of the stem. The range values of average ecosystem carbon sequestration of this study may be better used as a reference for Afforestation, Reforestation and Re-vegetation (ARR) verification than what has been used as default/conservative values.

KEYWORDS
Restored Mangroves, Carbon Stocks, Carbon Sequestration

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] Bambang Suprayogi , J. Purbopuspito , Meilinda Suriani Harefa , G.Y. Panjaitan , Z. Nasution , "Ecosystem Carbon Stocks of Restored Mangroves and Its Sequestration in Northern Sumatra Coast, Indonesia," Universal Journal of Agricultural Research, Vol. 10, No. 1, pp. 1 - 19, 2022. DOI: 10.13189/ujar.2022.100101.

(b). APA Format:
Bambang Suprayogi , J. Purbopuspito , Meilinda Suriani Harefa , G.Y. Panjaitan , Z. Nasution (2022). Ecosystem Carbon Stocks of Restored Mangroves and Its Sequestration in Northern Sumatra Coast, Indonesia. Universal Journal of Agricultural Research, 10(1), 1 - 19. DOI: 10.13189/ujar.2022.100101.