Komposisi Jenis dan Potensi Sekuestrasi Karbon pada Ekosistem Mangrove Di Kelurahan Loktuan, Bontang, Kalimantan Timur

Sumarsih, Nonik (2023) Komposisi Jenis dan Potensi Sekuestrasi Karbon pada Ekosistem Mangrove Di Kelurahan Loktuan, Bontang, Kalimantan Timur. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bumi mengalami pemanasan global akibat meningkatnya konsentrasi gas rumah kaca di atmosfer seperti gas CO2 dan CH4 yang dihasilkan dari sektor industri, aktivitas transportasi, dan kegiatan pertanian maupun peternakan. Untuk itu diperlukan upaya mitigasi untuk menekan kenaikan temperatur global. Hutan mangrove memiliki produktivitas primer tinggi sehingga dikenal sebagai penyimpan karbon yang baik (karbon sekuestrator). Kemampuan ini sangat berperan dalam regulasi mitigasi iklim yang dimanfaatkan untuk menyerap emisi antropogenik CO2. Kelurahan Loktuan Bontang Utara, Kalimantan Timur memiliki hutan mangrove di Telok Bangko dan lahan HGB. Disisi lain, kelurahan ini merupakan wilayah yang dikelilingi oleh area industri dan permukiman yang berpotensi menghasilkan emisi CO2. Untuk itu, tujuan penelitian ini memperoleh informasi biomassa, estimamsi cadangan karbon, estimasi serapan karbon dan keanekaragaman jenis pohon mangrove yang memiliki potensi cadangan karbon di Telok Bangko dan lahan HGB. Sampling dilakukan dengan metode transek kuadran bersilang. Di setiap lokasi dilakukan transek sebanyak empat kali. Setiap transek terdapat empat kuadran bersilang berukuran 10 m x 10 m. Perhitungan estimasi biomassa tersimpan pada mangrove menggunakan persamaan allometrik. Selanjutnya dihitung estimasi cadangan karbon dan serapan karbon. Hasil tersebut akan disajikan secara kuantitatif deskriptif. Dari penelitian ini didapati komposisi mangrove yang berada di Telok Bangko dan lahan HGB ditemukan 11 spesies yaitu Rhizophora mucronata, Avicennia marina, Sonneratia alba, Sonneratia ovata, Derris trifoliata, Ceriops tagal, x Lumnitzera racemosa, Xylocarpus granatum, Terminalia catappa, Thespesia populnea, dan Wedelia biflora. Hasil estimasi cadangan karbon ekosistem mangrove di Telok Bangko diperoleh sebesar 2236,36 ton/ha dengan nilai biomassa sebesar 4819,74 ton/ha. Sementara di daerah HGB diperoleh hasil estimasi cadangan karbon 2980,48 ton/ha dengan nilai biomassa sebesar 6423,44 ton/ha. Estimasi serapan karbon di Telok Bangko diperoleh 8207,44 ton/ha. Sedangkan estimasi serapan karbon di lahan HGB sebesar 10938,35 ton/ha. Spesies Rhizophora mucronata merupakan spesies yang memberi kontribusi tertinggi.
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The earth is experiencing global warming due to the increasing concentration of greenhouse gases in the atmosphere such as CO2 dan CH4 gases which are produced by the industrial sector, transportation activities, dan agricultural dan livestock activities. For this reason, mitigation efforts are needed to reduce global temperature rise. Mangrove forests have high primary productivity, so they are known as good carbon stores (carbon sequestrators). This ability plays a vital role in climate mitigation regulation which is used to absorb CO2 anthropogenic emissions. North Bontang Loktuan Urban Village, East Kalimantan has a mangrove forest in Telok Bangko and the HGB area. On the other hand, this urban village is an area surrounded by industrial dan residential areas that have the potential to produce CO2 emissions. For this reason, this study aimed to obtain information on biomass, carbon stock estimation, carbon absorption estimation, and the diversity of mangrove tree species that have possible stock carbon in the Telok Bangko dan HGB area. Sampling was carried out using the crossed quadrant transect method. At each location, the transect was carried out four times. Each transect has four crossed quadrants measuring 10 m x 10 m. Calculation of estimated stored biomass in mangroves using allometric equations. Next, estimates of stock carbon, and carbon absorption are calculated. These results will be presented quantitatively descriptively. From this study, it was found that the composition of the mangroves in the Telok Bangko and HGB area found 11 species, namely Rhizophora mucronata, Avicennia marina, Sonneratia alba, Sonneratia ovata, Derris trifoliata, Ceriops tagal, Lumnitzera racemosa, Xylocarpus granatum, Terminalia xii catappa, Thespesia populnea, and Wedelia biflora. The results of estimating the stock carbon of the mangrove ecosystem in Telok Bangko were 2236.36 tonnes/ha with a biomass value of 4819.74 tonnes/ha. While in the HGB area, the results of stock carbon were 2980.48 tonnes/ha with a biomass value of 6423.44 tonnes/ha. Estimated carbon absorption in Telok Bangko obtained 8207.44 tonnes/ha. Meanwhile, carbon absorption in HGB area was 10,938.35 tonnes/ha. Rhizophora mucronata is the species that gives the highest contribution.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Analisis vegetasi, mangrove, simpanan karbon, serapan karbon Analysis of vegetation, stock carbon, carbon absorption
Subjects:	Q Science Q Science > QH Biology Q Science > QH Biology > QH541 Ecology
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Biology > 46101-(S2) Master Thesis
Depositing User:	Nonik Sumarsih
Date Deposited:	15 Sep 2023 02:15
Last Modified:	15 Sep 2023 02:15
URI:	http://repository.its.ac.id/id/eprint/104947

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