Seagrass Carbon Stock Variability Across Contrasting Coastal Areas on Pari Island, Indonesia

Bima Faqih Ramadhan; Yonvitner; Fery Kurniawan

doi:10.29244/coj.v10i1.72452

Bima Faqih Ramadhan ⁽¹⁾ , Yonvitner ⁽²⁾ , Fery Kurniawan ⁽²⁾

(1) Study Program of Coastal and Marine Resource Management, IPB University, Bogor 16680, Indonesia, Indonesia, Indonesia,

(2) Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University, Bogor 16680, Indonesia, Indonesia, Indonesia

https://doi.org/10.29244/coj.v10i1.72452

Issue
Vol. 10 No. 1 (2026): COJ (Coastal and Ocean Journal)

Submitted
April 2, 2026

Accepted
June 14, 2026

Published
June 15, 2026

Keywords:

seagrass meadow, blue carbon, sediment carbon stock, small tropical islands, Pari Island

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Abstract

Seagrass meadows are important blue carbon ecosystems, yet integrated estimates of biomass and sediment carbon stocks in small tropical islands remain limited. This study quantified total ecosystem carbon stock in seagrass meadows of Pari Island, Thousand Islands, Jakarta, and compared carbon storage between developed and natural coastal areas. Field sampling was conducted at four stations representing contrasting coastal use settings. Seagrass ecological parameters were assessed using a line transect quadrat, while aboveground biomass, belowground biomass, and sediment carbon stocks were estimated using the Loss on Ignition (LOI) approach. Sediment cores were collected and analyzed across representative depth intervals to estimate profile-based carbon storage. Mean total ecosystem carbon stock was 118.08 Mg C ha^-1, ranging from 83.15 Mg C ha^-1 to 135.46 Mg C ha^-1among stations. Sediment was the dominant carbon pool, contributing approximately 92-96% of the total carbon stock in the ecosystem, whereas biomass contributed less than 8%. Undisturbed areas showed higher mean sediment carbon stock than anthropogenic areas, although the difference was not statistically significant. In contrast, anthropogenic areas exhibited greater spatial variability in carbon storage. These results show that seagrass meadows in Pari Island function as important blue carbon reservoirs and underscore the importance of sediment integrity in maintaining ecosystem carbon storage.

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Authors

Bima Faqih Ramadhan

Study Program of Coastal and Marine Resource Management, IPB University, Bogor 16680, Indonesia, Indonesia, Indonesia

bfaqih16@gmail.com (Primary Contact)

Yonvitner

Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University, Bogor 16680, Indonesia, Indonesia, Indonesia

Fery Kurniawan

Department of Aquatic Resources Management, Faculty of Fisheries and Marine Science, IPB University, Bogor 16680, Indonesia, Indonesia, Indonesia

This work is licensed under a Creative Commons Attribution 4.0 International License.

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