Microplastic is plastic waste that is less than 5 mm in size and can accumulate in sediments. This study aims to determine the contaminant of microplastics in coastal Kartini sediments, Jepara. Sediment samples were taken in November 2019 with a purposive sampling method using sediment cores at 3 different stations namely the TPI River Estuary (Fish Auction Place), the LPWP River Estuary (Coastal Development Institution), and the BBPBAP River Estuary (Central Brackish Aquaculture Fisheries Center ), at 3 points inside it is 20 cm, 40 cm and 60 cm. The sample is dried and then separated based on grain size using a sieve shaker. Sediments trapped in 0.3 mm sieve size, taken as much as 50 g then immersed in 200 mL 30% H2O2 for 24 hours and then dried. Microplastic is separated from the sediment with 200 ml NaCl ρ = 1.2 g / cm-3, and the remainder the residue is immersed in 200 ml of ZnCl ρ = 1.5 g / cm-3. The number, shape, color and size of the microplastic were observed using the SZ 61 olympus microscope with a magnification of 10 x 10. The results showed that the most microplastics were found in the estuary of the TPI River (Fish Auction Place), namely 643 particles, followed at the estuary of the BBPBAP River (Center for Aquaculture Fisheries) Brackish) 499 particles and at least at station 2 there are 438 particles. The microplastic form is dominated by 506 fragments of particles, while the least microplastic is a pellet that is 295 particles. The microplastic color is dominated by brown as many as 466 particles, while the microplastic color is the least pink and clear as much as 2 particles / 50 g of dry sediment. The largest microplastic size is 208.29 µm and the smallest size is 6.21 µm. ABSTRAK: Mikroplastik adalah sampah plastik yang berukuran kurang dari 5 mm dan dapat terakumulasi pada sedimen. Penelitian ini bertujuan untuk mengetahui kandungan mikroplastik di sedimen pantai Kartini, Jepara. Sampel sedimen diambil pada bulan November 2019 dengan metode purpossive sampling menggunakan sediment core pada 3 stasiun yang berbeda yaitu Muara Sungai TPI(Tempat Pelelangan Ikan), Muara Sungai LPWP(Lembaga Pengembangan Wilayah Pantai), dan Muara Sungai BBPBAP(Balai Besar Perikanan Budidaya Air Payau), pada 3 titik kedalamanyaitu 20 cm, 40 cm, dan 60 cm. Sampel di keringkan kemudian dipisahkan berdasarkan ukuran butir menggunakan sieve shaker. Sedimen yang terjebak dalam sieve ukuran 0,3 mm, diambil sebanyak 50 g kemudian direndam dalam 200 mL H2O2 30% selama 24 jam lalu dikeringkan.Mikroplastik dipisahkan dari sedimen dengan 200 ml NaCl ρ = 1,2 g/cm-3, dan sisa residu nya direndam dalam 200 ml ZnCl ρ =1,5 g/cm-3. Jumlah, bentuk, warna dan ukuran mikroplastik diamati menggunakan mikroskop olympus SZ 61 dengan perbesaran 10 x 10. Hasil penelitian menunjukkan mikroplastik terbanyak ditemukan di Muara Sungai TPI (Tempat Pelelangan Ikan) yaitu 643 partikel/50 g sedimen, diikuti pada Muara Sungai BBPBAP (Balai Besar Perikanan Budidaya Air Payau) 499 partikel/50 g sedimen dan paling sedikit pada stasiun 2 berjumlah 438 partikel/50 g sedimen. Bentuk mikroplastik di dominasi fragmen 506 partikel/50 g sedimen, sedangkan mikroplastik yang paling sedikit adalah pelet yaitu 295 partikel/50 g sedimen. Warna mikroplastik di dominasi warna coklat sebanyak 466 partikel/50 g sedimen, sedangkan warna mikroplastik yang paling sedikit merah muda dan bening sebanyak 2 partikel/50 g sedimen kering. Ukuran mikroplastik terbesar adalah 208,29 µm dan ukuran terkecil adalah 6,21 µm.
Kawasan mangrove di Desa Pasar Banggi ditetapkan sebagai salah satu kawasan strategis dari sudut kepentingan fungsi dan daya dukung lingkungan hidup. Ekosistem mangrove di Desa Pasar Banggi merupakan salah satu yang terbaik di wilayah Pantura Jawa Tengah, sebelum dilakukan upaya rehabilitasi kondisi hutan mangrove di Desa Pasar Banggi mengalami kerusakan. Mengingat pentingnya fungsi hutan mangrove, maka sudah selayaknya dilakukan penanganan yang serius untuk mengurangi efek dari kerusakan ekosistem mangrove di Rembang ini. Salah satu alternative pemanfaatan yang memungkinkan untuk menjaga keutuhan ekosistem mangrove tersebut adalah melalui kegiatan ekowisata. Tujuan dari penelitian ini adalah untuk mengkaji potensi ekowisata mangrove di Pasar Banggi dan memberikan rekomendasi serta strategi pengembangan ekowisata di Pasar Banggi, Rembang. Metode yang digunakan dalam penelitian ini adalah deskriptif eksploratif. Metode pengumpulan data dengan menggunakan metode survei dalam bentuk data primer dan data sekunder. Data yang diperoleh dilakukan penentuan strategi pengembangan ekowisata mangrove dan analisis SWOT (Strength, Weakness, Opportunity, dan Threat). Hasil penelitian menunjukan bahwa faktor-faktor yang mempengaruhi pengembangan ekowisata mangrove di Desa Pasar Banggi adalah keragaman jenis mangrove, kualitas SDM dalam menangani wisatawan, ketersediaan SDA berkualitas untuk ekowisata dalam upaya konservasi, kebijakan dari pemerintah daerah terkait peraturan serta perundang-undangan tentang ekowisata hutan mangrove di Desa Pasar Banggi, kondisi sosial-ekonomi masyarakat, serta infrastruktur pendukung. Menurut analisi SWOT yang menjadi prioritas utama adalah: a) Peningkatan pengembangan ekowisata mangrove dalam bidang promosi program ekowisata dan penguatan institusi sebagai informasi ilmu pengetahuan ekosistem mangrove (Skor:4,52) dan b) Peningkatan partisipasi stakeholder terhadap pengembangan ekowisata mangrove yang berkelanjutan untuk peningkatan pelayanan terhadap pengunjung (Skor:3,29). The mangrove area in Pasar Banggi Village is designated as one of the strategic region, as the point of importance of function and living environmental support. Mangrove ecosystem in Pasar Banggi Village is the best one area in Pantura, Central Java. Actually, Pasar Banggi Village’s condition was suffered damage before any efforts of rehabilitation of mangrove forest. Regarding the importance of the function of mangrove forests, there is a must doing a serious action to reduce the damage effects to the mangrove’s ecosystem in Rembang. One of the utilization alternative that can be used to maintain the integrity of the mangrove ecosystem is through ecotourism activities. The purpose of this research is examining the potential of ecotourism in Pasar Banggi Village and giving recommendation with ecotourism development strategy. Method which is used in this research is explorative descriptive.The collecting data method using survey method in form of primary data and secondary data. Then take the decision about the mangrove ecotourism development strategy and SWOT (Strength, Weakness, Opportunity, and Threat) analysis, after the data were obtained. The research results shows that the factors that affects the mangrove ecotourism development in Pasar Banggi Village is kind of types of mangroves, human resources’ quality while dealing with tourists or visitors, the availability of qualified nature resources for ecotourism, in effort of conservation, a policy of regional government related regulations and law about mangrove forest ecotourism in Pasar Banggi Village, community’s socio-economic conditions, also supporting infrastructure. According to the SWOT analysis, the top concerning priority are: a) mangrove ecotourism raising development in the field of ecotourism program promotion and institution strengthening as the mangrove ecosystem knowledge information (Score: 4.52) and b) Raising stakeholders’ participation toward the sustainable mangrove ecotourism development for improving service toward visitors (Score: 3.29)
The concentrations of metals in the marine sediment were found in coatal areas of Tugu Semarang. Three metals (Cr, Pb and, Cu) has found in coastal areas in research area. Shingly significantly those heavy metals have significantly influences on the abundance and diversity of benthic organisms. That has been proved by regression test which number of r= 0,99 on abundance and r= 0,92 on diversity. The increasing of heavy metals concentration will following of the number of abundance and diversity of benthic organisms in that area. Keywords: Metals, sediment,benthick organisms AbstrakKonsentrasi logam berat telah ditemukan dalam sedimen laut ut di daerah pesisir Tugu Semarang. Tiga logam berat seperti (Cr, Pb, dan Cu) telah ditemukan di lokasi penelitian. Secara nyata terlihat bahwa logam tersebut berpengaruh terhadap kelimpahan dan keanekaragaman organisme dasar perairan. Hal tersebut dibuktikan dengan regresi berganda antara kelimpahan organisme dengan logam berat dalam sedimen dengan nilai r = 0,99, sedangkan hubungan antara keanekaragaman dengan dengan logam berat dalam sediemen dengan nilai r = 0,92. Peningkatan konsentrasi logam berat dalam sediiemen akan diikuti penurunan kelimpahan dan keanekaragaman organisme dasar perairan. Kata Kunci: Logam berat, sedimen, organisme dasar
Contamination of Heavy Metal Arsen, Mercury and Magnesium in the Seawater, Sedimen and Anadara inaequivalvis (Mollusca: Bivalvia, Bruguiera, 1792) in Brebes, Central Java, Indonesia Brebes coastal areas have been developed into industrial areas and human settlement. It has been causing effect on coastal environmental. Heavy metal is one of many source of pollution in coastal environmental. In order to assess As, Hg and Mg contaminant on the Brebes coast, Central Java, samples of marine water, sediment and Anadara inaequivalvis specimens were collected for analyzed by Inductively Coupled Plasma-Mass Spectrometer (ICPMS). The result showed that the heavy metal As, Hg and Mg were found in the sea water, sediment, and in the tissue of A. inaequivalvis. The concentration of Mg was the highest compared to As and Hg in all samples. Meanwhile As and Hg had the lowest concentration. We concluded that Brebes coastal areas has been contaminated by heavy metals. The bio-ability of bivalves to accumulate heavy metals depends on many factors such as geochemical and biological factors. Pesisir Brebes telah berkembang menjadi daerah industri dan tempat tinggal. Hal tersebut tentunya akan memberi dampak pada lingkungan pesisir. Logam berat perupakan salah satu penyebap pencemaran di lingkungan pesisir. Untuk mengetahui kontaminasi As, Hg dan Mg di pesisir Brebes, maka beberapa sampel air laut, sedimen dan kerang A. inaequivalvis dianalisa menggunakan ICPMS. Hasil penelitian menunjukan bahwa logam berat As, Hg dan Mg ditemukan dalam air laut, sedimen dan kerang A. inaequivalvis. Konsentrasi Mg menunjukan nilai yang paling tinggi di semua sampel yang dianalisa. Sedangkan konsentrasi As dan Hg menunjukan nilai yang rendah secara berurutan. Hal ini dapat disimpulkan bahwa pesisir Brebes talah terkontaminasi oleh logam berat. Kemampuan bivalvia unuk mengakumulasi logam tergantung banyak faktor seperti kondisi geokimiawi dan biologis.
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