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Abstrak :
Increased plastic waste in the environment, particularly in the mangrove forest of Pulau Rambut, Jakarta Bay, has the potential to affect the abundance of microplastics in the surrounding waters. Microplastics, which are very small in size (<5mm), can be accidentally ingested by marine organisms such as Terebralia palustris and have negative effects on marine life, the environment, and humans. This study aims to analyze the comparison of microplastic abundance in T.palustris and sediment in the mangrove forest of Pulau Rambut, Jakarta Bay, in 2022 and 2023, as well as to determine the correlation between microplastic abundance in T.palustris and sediment. Twenty samples of T.palustris and sediment were collected at four stations in 2022 and 2023. The body tissue of T.palustris was separated from its shell, then dissolved with HNO3 and added to saturated NaCl. Sediment samples were dissolved with saturated NaCl. Microplastic abundance was observed and calculated using a Sedgwick Rafter Chamber under a microscope. Four forms of microplastics were observed in the T. palustris and sediment samples, namely fibers, fragments, films, and granules. The results showed an increase in microplastic abundance from 2022 to 2023. In 2022, the microplastic abundance was 363,592 ± 11,511 particles/g in T. palustris and 66,69 ± 7,638 particles/g in sediment, while in 2023, it reached 406,574 ± 6,154 particles/g in T. palustris and 79,7 ± 12,992 particles/g in sediment. From 2022 to 2023, the abundance of microplastic in T.palustris (particle/g) increased by 5%, T.palustris (particle/individual) increased by 37%, and sediment by 19%. There is a positive correlation between the microplastic abundance of T.palustris and sediment, with value of 0,768 obtained from the Spearman correlation test.Increased plastic waste in the environment, particularly in the mangrove forest of Pulau Rambut, Jakarta Bay, has the potential to affect the abundance of microplastics in the surrounding waters. Microplastics, which are very small in size (<5mm), can be accidentally ingested by marine organisms such as Terebralia palustris and have negative effects on marine life, the environment, and humans. This study aims to analyze the comparison of microplastic abundance in T.palustris and sediment in the mangrove forest of Pulau Rambut, Jakarta Bay, in 2022 and 2023, as well as to determine the correlation between microplastic abundance in T.palustris and sediment. Twenty samples of T.palustris and sediment were collected at four stations in 2022 and 2023. The body tissue of T.palustris was separated from its shell, then dissolved with HNO3 and added to saturated NaCl. Sediment samples were dissolved with saturated NaCl. Microplastic abundance was observed and calculated using a Sedgwick Rafter Chamber under a microscope. Four forms of microplastics were observed in the T. palustris and sediment samples, namely fibers, fragments, films, and granules. The results showed an increase in microplastic abundance from 2022 to 2023. In 2022, the microplastic abundance was 363,592 ± 11,511 particles/g in T. palustris and 66,69 ± 7,638 particles/g in sediment, while in 2023, it reached 406,574 ± 6,154 particles/g in T. palustris and 79,7 ± 12,992 particles/g in sediment. From 2022 to 2023, the abundance of microplastic in T.palustris (particle/g) increased by 5%, T.palustris (particle/individual) increased by 37%, and sediment by 19%. There is a positive correlation between the microplastic abundance of T.palustris and sediment, with value of 0,768 obtained from the Spearman correlation test. ......Increased plastic waste in the environment, particularly in the mangrove forest of Pulau Rambut, Jakarta Bay, has the potential to affect the abundance of microplastics in the surrounding waters. Microplastics, which are very small in size (<5mm), can be accidentally ingested by marine organisms such as Terebralia palustris and have negative effects on marine life, the environment, and humans. This study aims to analyze the comparison of microplastic abundance in T.palustris and sediment in the mangrove forest of Pulau Rambut, Jakarta Bay, in 2022 and 2023, as well as to determine the correlation between microplastic abundance in T.palustris and sediment. Twenty samples of T.palustris and sediment were collected at four stations in 2022 and 2023. The body tissue of T.palustris was separated from its shell, then dissolved with HNO3 and added to saturated NaCl. Sediment samples were dissolved with saturated NaCl. Microplastic abundance was observed and calculated using a Sedgwick Rafter Chamber under a microscope. Four forms of microplastics were observed in the T. palustris and sediment samples, namely fibers, fragments, films, and granules. The results showed an increase in microplastic abundance from 2022 to 2023. In 2022, the microplastic abundance was 363,592 ± 11,511 particles/g in T. palustris and 66,69 ± 7,638 particles/g in sediment, while in 2023, it reached 406,574 ± 6,154 particles/g in T. palustris and 79,7 ± 12,992 particles/g in sediment. From 2022 to 2023, the abundance of microplastic in T.palustris (particle/g) increased by 5%, T.palustris (particle/individual) increased by 37%, and sediment by 19%. There is a positive correlation between the microplastic abundance of T.palustris and sediment, with value of 0,768 obtained from the Spearman correlation test.

Abstrak :
Karbon di Indonesia semakin meningkat setiap tahunnya, hal ini memberikan dampak buruk bagi kehidupan manusia. Salah satu langkah untuk mengurangi CO2 di alam adalah dengan meningkatkan jumlah penyerapan CO2, dan hutan mangrove merupakan salah satu tempat penyimpanan CO2 di bumi. Mangrove dapat menyerap CO2 di tegakan mangrove, sedimen, dan fauna mangrove seperti T. palustris. Penelitian ini bertujuan untuk mengetahui dan menganalisis perbandingan simpanan karbon T. palustris dan sedimen serta pengaruh pH, salinitas, dan suhu terhadap jumlah karbon yang dapat disimpan oleh T. palustris di Pulau Rambut, DKI Jakarta pada tahun 2022 dan 2023. Sampel diambil dari 4 stasiun, lalu sampel cangkang dan tubuh T. palustris dipisahkan. Siput dan sedimen dikeringkan di oven, kemudian ditumbuk menggunakan alu mortar. Sedimen disaring menggunakan sieve net. Cangkang diberi larutan HCl 1N, tubuh dan sedimen di furnace. Perhitungan nilai karbon dihitung menggunakan rumus dari masing-masing sampel. Data yang diperoleh dihitung nilai korelasi dan uji-T dengan menggunakan SPSS. Hasil Rata-rata karbon tahun 2022 untuk cangkang T. palustris adalah 10,559 ± 0,201, tubuh T. palustris 26,019 ± 2,697, sedimen 148,185 ± 11, 683. Tahun 2023 rata-rata karbon untuk cangkang T. palustris adalah 10,398 ± 0,588, tubuh T. palustris 22,162 ± 1,838, dan sedimen 143,671 ± 11, 442. Korelasi antara cangkang dan tubuh T. palustris, dan T. palustris terhadap sedimen dapat dikatakan tidak memiliki korelasi, terdapat korelasi negatif di cangkang dan tubuh T. palustris tahun 2023, dan hasil perbandingan yang diperoleh pada tahun 2022 dan 2023 untuk cangkang, tubuh, dan sedimen menunjukkan tidak terdapat perbedaan yang signifikan. ......Carbon in Indonesia is increasing every year, this has a negative impact on human life. One of the steps to reduce CO2 in nature is to increase the amount of CO2 absorption, and mangrove forests are one of the CO2 storage places on earth. Mangroves can absorb CO2 in mangrove stands, sediments, and mangrove fauna such as T. palustris. This study aims to determine and analyze the comparison of T. palustris and sediment carbon storage and the influence of pH, salinity, and temperature on the amount of carbon that can be stored by T. palustris on Rambut Island, DKI Jakarta in 2022 and 2023. Samples were taken from 4 stations, then the shell and body samples of T. palustris were separated. The snails and sediments were oven dried, then crushed using a mortar and pestle. Sediment was filtered using a sieve. The shell was given a 1N HCl solution, the body and sediment in the furnace. Calculation of carbon value was calculated using the formula of each sample. The data obtained were calculated the correlation value and T-test used SPSS. Average carbon results in 2022 for T. palustris shells amounted to 10.559 ± 0.201, T. palustris body 26.019 ± 2.697, sediment 148.185 ± 11.683. In 2023 the average carbon for T. palustris shell was 10.398 ± 0.588, T. palustris body 22.162 ± 1.838, and sediment 143.671 ± 11.442. The correlation between T. palustris shell and body, and T. palustris with sediment can be said to have no correlation, there is a negative correlation in T. palustris shell and body in 2023, and the comparison results obtained in 2022 and 2023 for shell, body, and sediment show no significant difference.