Ecosystem Carbon Stocks of Restored Mangroves and Its Sequestration in Northern Sumatra Coast, Indonesia

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 (D 30 ) and (b) combined quadratic stem diameter and tree height (D 302 H) 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 D 302 H allometry (362.0 MgC ha -1 ) was higher than that estimated by D 30 allometry (344.1 MgC ha -1 ). This higher trend was also followed by its carbon sequestration with values of 41.1 MgCO 2 e ha -1 yr -1 estimated by D 302 H allometry and 31.5 MgCO 2 e ha -1 yr -1 estimated by D 30 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 (D 302 H) are higher than if it is estimated by stem diameter (D 30 ). The D 302 H value is higher because this allometry calculates the volume of the tree stem, while D 30 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.

• Publication year

  2022

• Venue

  Universal Journal of Agricultural Research

• Publication date

  2022-02-01

• Fields of study

  Not labeled

• Identifiers
  DOI 10.13189/ujar.2022.100101
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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