| dc.description.abstract | Mangrove ecosystems provide valuable goods and services to coastal communities
as a source of livelihoods, shoreline stabilization, and climate change mitigation.
The 56% decline in mangroves due to illegal logging has triggered rehabilitation
efforts conducted by the Center for Mangrove Science and Technology (PUIMangrove)
of the University of North Sumatra since 2015 and 2016. This study
aims to analyze vegetation dynamics, calculate carbon storage, and measure CO₂
fluxes during the rainy and dry seasons after 10 years of rehabilitation. Data were
collected using a census method in the form of diameter at breast height (DBH) and
tree height. As a result, 13 types of mangrove plants were found, consisting of 11
true mangroves (Aegiceras corniculatum, Avicennia marina, Bruguiera
gymnorrhiza, Ceriops tagal, Excoecaria agallocha, Nypa fruticans, Rhizophora
apiculata, Rhizophora mucronata, Rhizophora stylosa, Scyphiphora
hydrophyllacea, and Sonneratia alba) and 2 types of associated mangroves
(Acrostichum aureum and Finlaysonia maritima). Total carbon storage reached
123.44 MgC ha-¹, with an economic value of approximately IDR 558,581,137 ha⁻¹
using a carbon credit price of 19 USD per ton C and an exchange rate of IDR
16,711.50 per USD on November 6, 2025. The average CO₂ flux was recorded at
405.30±226.28 mg/m²/hour in the dry season and 379.12±258.12 mg/m²/hour in the
rainy season. These findings indicate that mangrove rehabilitation in abandoned
ponds effectively restores vegetation structure, increases carbon storage, and
contributes to climate change mitigation as well as opens up opportunities for
utilizing carbon-based environmental service schemes | en_US |
