Rhizophora apiculata: Growth, Allometry and Carbon Potential

Updated 2026-11-02 · 3 min read · By the akar.earth specialist team

Rhizophora apiculata carbon sequestration: mangrove ecology, Indonesian names, wood density, mangrove allometry, charcoal rotations and blue carbon role.

Rhizophora apiculata sequesters carbon in very dense wood, stilt roots and the organic-rich mangrove soils it helps build. It is the main timber and charcoal mangrove of Southeast Asia, so its carbon accounting often has to deal with harvest as well as restoration.

Identity and range

Rhizophora apiculata is a true mangrove in the family Rhizophoraceae. In Indonesia it is called bakau minyak, bakau tandok, bakau putih or bakau, with local variants. In English it is often called tall-stilt mangrove.

It is native from South Asia through Southeast Asia to northern Australia and the western Pacific. In Indonesia it is common on sheltered, muddy coasts and estuaries of Sumatra, Kalimantan, Sulawesi, Maluku and Papua, with large natural stands in places such as Riau, West Kalimantan and Papua’s southern and western coasts. It is also widely planted in rehabilitation projects.

Growth habit and rotation

R. apiculata is a straight-stemmed tree that can exceed 25 to 30 m in mature forest, with arching stilt roots. It is distinguished from R. mucronata by smaller pointed leaves, paired flowers on short stalks, often reddish leaf stipules and shorter propagules.

It grows in the intertidal zone on deep, soft mud flooded by normal high tides, often forming dense stands in mid-zone estuarine forest. Like other Rhizophora, it is viviparous and spreads by propagules.

R. apiculata is the principal species in managed charcoal mangroves. The Matang Mangrove Forest Reserve in Malaysia, a long-studied example, is managed on a rotation of around 30 years with thinning. Charcoal production from mangroves also occurs in parts of Indonesia. Reported growth rates vary widely with salinity, tide and sediment.

Wood density and biomass estimation

R. apiculata has very heavy wood. Reported basic density values fall roughly between 0.75 and 0.95 g/cm³, varying with site and age. Record the wood density source used.

Common approaches:

• Komiyama et al. 2005 common mangrove equation, based on DBH and wood density, with a companion root equation.
• Species-specific R. apiculata equations, including work from the Matang reserve and elsewhere in Southeast Asia. These often perform well within their size range.
• Chave et al. 2014: AGB (kg) = 0.0673 × (ρ × D² × H)^0.976, with ρ in g/cm³, D in cm and H in m.

Measure DBH above the highest stilt root and record the height of measurement. See our allometric equations guide.

Convert biomass to carbon with a carbon fraction (IPCC default 0.47, or mangrove values in the IPCC Wetlands Supplement) and to CO2 with 44/12.

Carbon role in blue carbon projects

• Restoration. R. apiculata is a good choice where tidal flooding and mud depth suit it. Restoration claiming soil carbon usually uses Verra’s VM0033.
• Soil carbon. Mangrove soils store most ecosystem carbon. See mangrove soil carbon.
• Managed harvest. Where stands are harvested, crediting must reflect the long-term average stock across rotations rather than the peak, as ARR methods such as VM0047 require for harvested systems. Check the methodology you use.
• Avoided loss. Protecting stands from conversion to ponds or plantations avoids large soil carbon emissions.

See the blue carbon hub for project pathways.

Co-benefits and livelihoods

R. apiculata forests protect shorelines, support fisheries, crabs and shellfish, and supply timber, poles and charcoal. Well-managed rotations can provide income while keeping forest cover.

Risks and cautions

• Wrong site. Planting in the wrong tidal zone or on raised pond walls leads to high mortality.
• Overharvesting. Unsustainable charcoal cutting degrades stands and exposes soil carbon.
• Conversion. Aquaculture and coastal development are the main drivers of mangrove loss. See aquaculture pond rehabilitation.
• Monoculture. Pure Rhizophora plantings are less resilient than mixed stands.
• Sea-level rise and sediment loss. Stands need sediment and room to migrate landward.

Planning notes for project developers

• Separate harvest and conservation zones. In managed mangroves, map production and protection areas as distinct strata.
• Measure above the stilt roots. Inconsistent measurement height is a common audit finding in Rhizophora plots.
• Track tidal restoration. Record when ponds are breached or channels reopened, because recruitment and soil change follow hydrology.

Worked example

An R. apiculata with DBH 15 cm (above stilt roots), height 14 m and density 0.80 g/cm³, using Chave et al. 2014:

1. ρ × D² × H = 0.80 × 225 × 14 = 2,520
2. AGB = 0.0673 × 2,520^0.976 ≈ 140 kg
3. Carbon = 140 × 0.47 ≈ 66 kg C
4. CO2e = 66 × 44/12 ≈ 242 kg CO2e (above-ground only)

Test values with the tree CO2 calculator, and compare with R. mucronata.