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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 :
Aktivitas manusia di sekitar tambak silvofishery berpotensi menyumbang limbah dan meningkatkan ancaman polusi logam berat. Jumlah limbah logam berat, terutama dari industri yang masuk ke dalam perairan tambak diduga memengaruhi organisme akuatik yang berada di dalamnya. Keong bakau (Telescopium telescopium) dan kepiting bakau (Goniopsis pelii) adalah biota non-budaya yang hadir di tambak silvofishery dan dikonsumsi oleh manusia. Penelitian ini bertujuan untuk menguji kandungan logam berat pada keong bakau, kepiting bakau dan sedimen pada tambak silvofishery Blanakan-Subang. Pengambilan sampel dilakukan pada bulan April 2018, di tiga stasiun dengan metode purposive random sampling. Kandungan logam berat dianalisis menggunakan spektrofotometri serapan atom. Hasil penelitian menunjukkan bahwa kandungan Pb tertinggi terdapat pada keong bakau di stasiun 3 sebesar 19,46 mg kg. Kandungan Cu dan Zn tertinggi terdapat pada kepiting bakau di stasiun 2 masingmasing sebesar 33,77 mg/kg dan 22,54 mg kg. Secara umum, pada sedimen kandungan Zn Cu Pb. Kandungan Pb, Cu dan Zn tertinggi di sedimen terdapat di stasiun 2 masing-masing sebesar 19,55 mg kg, 6,76 mg kg, dan 68,56 mg kg. Uji Manova dua arah menunjukkan bahwa jenis/ variabel (keong bakau, kepiting bakau, sedimen) dan lokasi (stasiun, inlet/ outlet) berpengaruh nyata terhadap nilai Pb, Cu dan Zn. Nilai faktor biokonsentrasi 1 menunjukkan bahwa keong bakau dan kepiting bakau memiliki kecenderungan untuk mengakumulasi logam berat. Berdasarkan BPOM No 03725-B-SK-VII-89, masyarakat harus lebih berhati-hati dalam mengkonsumsinya. Selanjutnya, keong bakau dan kepiting bakau dapat digunakan sebagai bioindikator untuk mengendalikan pencemaran lingkungan.

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Human activities around the silvofishery ponds potentially contribute waste and promote heavy metals pollution threats. High input of this metals, especially from industry waste that entered the ponds suspected affect aquatic organism inside it. Mangrove snail (Telescopium telescopium) and mangrove crab (Goniopsis pelii) are non-cultured biota which is present at silvofishery ponds and consumed by humans. This research aimed to determine metals content in mangrove snail, mangrove crab and sediment at Blanakan silvofishery ponds. Sampling was done on April 2018, at three stations using purposive random sampling. Metals content were analysed using atomic absorption spectrophotometry. Result showed that the highest Pb content was in mangrove snail at station 3 at 19,46 mg kg. The highest Cu and Zn content was in mangrove crab at station 2 at 33,77 mg kg and 22.54 mg kg respectively. Generally, metals content in sediment was Zn Cu Pb. The highest content of Pb, Cu and Zn in sediment was at station 2 at 19,55 mg kg, 6,76 mg kg, dan 68,56 mg kg respectively. Manova test showed that variables (mangrove snail, mangrove crab, sediment) and location (station, inlet/outlet) significantly affect the value of Pb, Cu and Zn. The bioconcentration values 1 showed that mangrove snail and mangrove crab has a tendency to accumulate heavy metals. Based on BPOM No 03725-B-SK-VII-89, people must be more careful in consuming them. In the future, mangrove snail and mangrove crab can be used as bioindicator to control environmental pollution.