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"Penelitian ini bertujuan untuk menghitung nilai biomassa dan cadangan karbon hutan magrove, nilai ekonomi total ekosistem hutan mangrove, dan untuk mengidentifikasi kontribusinya terhadap masyarakat di kawasan ekosisten hutan mangrove serta untuk menganalisis persepsi masyarakat terhadap keberadaan dan potensi hutan magrove di Gampong Kuala Langsa, Kabupaten Langsa Barat, Kota Langsa, Aceh. Penelitian ini dilakukan pada November 2016 sampai dengan Februari 2017. Cadangan karbon dihitung dengan menggunakan persamaan alometrik umum untuk tanaman mangrove. Nilai ekonomi total diterapkan untuk memperkirakan nilai ekonomi berdasarkan manfaat ekosistem hutan mangrove.Hasil penghitungan kandungan karbon diketahui bahwa ekosistem hutan mangrove Kuala Langsa menyimpan 1.119.791,32 ton C/ha, dengan 99 cadangan karbon tersimpan di dalam tanah. Hasil perhitungan nilai ekonomi total ekosistem hutan mangrove Kuala Langsa didapatkan nilai sebesar Rp.233.917.708.451 ndash; Rp.309.475.627.768 per tahun. Hasil analisis menunjukkan bahwa interpretasi skor tingkat persepsi masyarakat terhadap keberadaan dan potensi hutan mangrove tergolong sangat baik 81,78, yang artinya masyarakat sudah sangat memahami manfaat akan keberadaan hutan mangrove dan pentingnya hutan mangrove karena fungsi ekosistemnya dan ketergantungan masyarakat terhadap hasil sumberdaya alamnya, seperti ikan, tiram, kerang, kepiting, dan udang guna kepentingan pasar dan konsumsi pribadi.

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The purpose of this study is to estimate the economics value of mangrove forest ecosystem, and to identify its contribution to the society and to analyze local people rsquo s perception on the excistence and the potential of mangrove forest ecosytem in Gampong Kuala Langsa, District of West Langsa, Langsa City, Aceh. This study has been conducted in November 2016 until February 2017. The calculation of carbon content is known Kuala Langsa mangrove ecosystem which is maintained 1,119,791,32 ton C ha. The method of economic valuation was applied to estimate the economic value based on the benefits of mangroves forest ecosystem. The calculation result of economic value of mangrove forest ecosystems was about Rp.233.917.708.451 Rp.309.475.627.768 per year.

The result of community perception analysis shows that the perception of public perception score on the existence and potential of mangrove forest is very good 81,78 . This mangrove forest ecosystem also has a large contribution to the community in this area as residential areas and sources of income such as oysters, shellfish, crabs, and shrimp. They were already aware the importance to protect mangrove forests because of its ecosystem function as land protection and their dependency on the natural resources potential of mangrove ecosystem, such as oysters, clams, crabs, and shrimps for market purpose or private consumption."

"The research of the Gastropoda community structure in Pangkal Babu Mangrove forest was conducted on January until February 2012. The researcher used Purposive Random Sampling Method. There are 1950 Gastropods in mangrove forest of Pangkal Babu which consist of 15 species, 11 genera, and six families. From the 15 species, there are two types of the species which have a high frequency of subsistence. They are Cerithidea obtusa and Cassidula aurisjudae, that is 93.33% for each. The range of Gastropoda relative density is between 28 ind/m2-58.1 ind/m2, species diversity ranges from 1.5 to 1.9, evenness of species is between 0.553 to 0.684 and the distribution of species ranges from 2.4 to 3.9. In measuring of abiotic parameter, the temperature showed 29oC--34oC. Substrate salinity values at the research site varies between 20 ? -- 26 ?. Substrate type heavy foundation at Station 1, 2, and 3 in the Pangkal Babu Mangrove forest is a kind of mud contour and the degree of acidity of the mud (pH) varies between 5- 7. Spearman correlation test results indicated there is no correlation between the density of Gastropoda and abiotic parameters."

"Many kinds of waste from poultry and fisheries by product such usintestine and blood chicken also shrimp head waste still have high nutrition andsignificant amounts. There are have high potency utilization as alternative feedanother commercial feed for marine worm aquaculture. The aims of this researchwere to know effect different kinds waste material as feed to growth, survival rate,and nutrient composition marine worm Nereis diversicolor. The research usedexperimental design in laboratorium. Experimental unit were arranged in acompletely randomized design with 4 treatments and 6 replication for eachtreatment. Kinds of feed were (A) intestine chicken powder; (B) shrimp headpowder; (C) blood chicken powder and (D) commercial fish feed as control. Theinitial weight of worms were range between 0,67 ? 0,71 g, after cultured for 50days showed weight gain were range between 0,31 ? 1,01 g, spesific growth rate(SGR) 0,73 ? 1,76 %/day, and survival rate 80,56 ? 92,22%. The result of analisisvarian weight growth, spesific growth rate, and survival rate showed significantdifferences. The best treatment was intestine chicken powder compare to the othertreatments. The result of proximate analysis such us protein were ranged between6,37 ? 6,65%. The highest protein on treatment B, and lowest on treatment C.The result of anova showed not significant diferences (P > 0,05) to value proteinworm. Value of fat on end exsperiment were ranged between 1,01 ? 2,34%. Thehighest fat on treatment D and lowest on treatment C. The result of anovashowed significanct differences (P < 0,05) to value of fat worm. The conclusionof this research was all kind of feed from local waste material source can be asalternative feed another commercial feed in marine worm aquaculture."

"Kawasan Segara Anakan merupakan habitat mangrove yang masih lengkap berdasarkan formasi vegetasinya. Keberadaan mangrove mempunyai manfaat bagi masyarakat pesisir. Penelitian ini dilaksanakan pada bulan Desember 2010 sampai Januari 2011. Penelitian ini untuk melihat perubahan secara kuantitatif dan spasial, prediksi trend perubahan luasan hutan mangrove, dan tingkat partisipasi masyarakat dalam pelestarian mangrove di Kawasan Segara Anakan, Kelurahan Kotawaru, Cilacap, Jawa Tengah, Indonesia. Metode yang digunakan dalam penelitian yaitu analisis Overlay dan diskriptif kuantitatif dengan pendekatan survei. Analisis statistik yang digunakan adalah Regresi Linear Sederhana dan Berganda. Hasil penelitian menunjukkan terjadi penyusutan luasan hutan mangrove, tahun 1991 (5.900 ha), tahun 2001 (5.200 ha), tahun 2005 (3.900 ha), dan tahun 2010 (3.600 ha). Berdasarkan persamaan linear sederhana, di prediksi luasan hutan di Kawasan Segara Anakan akan menjadi 0 ha pada tahun 2033. Berdasarkan persamaan linear berganda menunjukkan bahwa terdapat hubungan positif antara pendidikan, pendapatan, dan pengetahuan masyarakat terhadap partisipasi dalam pelestarian hutan mangrove di Kelurahan Kotawaru, Cilacap, Jawa Tengah.

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Segara Anakan Region is the habitat of mangrove which is still complete based on vegetation formation. The existence of mangrove has some advantages for the coastal inhabitants. The research has been accomplished in December 2010 - January 2011. The objectives of the research are to find out the quantitative and spatial changes, and the prediction in the change of mangrove area, and is to see the community's participation in conserving the mangrove in Segara Anakan Region, Kotawaru, Cilacap, Central Java, Indonesia. The method used in the research are analysis of overlay, descriptive with Surveys approach. The statistic analysis used is Simple and Multiple Regression Linear.

The research indicated that the mangrove area has decreased, in year 1991 (5.900 ha), 2001 (5.200 ha), 2005 (3.900 ha), and 2010 (3.600 ha). Based on the Simple Linear Equation, the mangrove will be predicted to become 0 ha in 2033. Based on the statistic analyses indicates that there is a positive relation between education, income, community?s knowledge to the community?s participation in conserving mangrove in Kotawaru, Cilacap, Central Java, Indonesia."

"Sumber karbon utama di ekosistem hutan terdiri dari biomassa pohon, tumbuhan bawah, serasah, kayu mati dan bahan organik tanah. Karbon hutan yang tersimpan pada biomassa atas permukaan (BAP) atau aboveground biomass (AGB) merupakan sumber terbesar dan paling terkena dampak deforestasi dan degradasi hutan. Deforestasi dan degradasi hutan merupakan penyumbang kedua terbesar emisi karbon ke atmosfer yang menyebabkan perubahan iklim, setelah penggunaan bahan bakar fosil oleh industri dan transportasi. Penelitian dilakukan dengan tujuan untuk mengkaji potensi BAP dan stok karbon berdasarkan tipe-tipe hutan, serta mengetahui pengaruh deforestasi terhadap perubahan stok karbon hutan di DAS Batang Natal dan sekitarnya, Mandailing Natal, Sumatera Utara. Pengukuran potensi biomassa pohon dilakukan dalam plot ukur berbentuk persegi panjang dengan ukuran 20 m x 125 m sebanyak 15 plot ukur. Sebanyak 8 plot dibuat di hutan lahan kering, 4 plot di hutan mangrove dan 3 plot di hutan rawa. Total area hutan yang disurvei mencapai 3,75 ha. Pohon dengan Diameter at Breast Height (DBH) ≥ 2 cm diidentifikasi dan diukur diameternya. Penghitungan biomassa dilakukan melalui persamaan alometrik yang sudah ada untuk hutan tropis. Analisis deforestasi dilakukan melalui pendekatan penginderaan jauh. Data citra satelit Landsat tahun 2000 dan 2011 dianalisis dengan metode klasifikasi terbimbing (supervised classification) Maximum Likelihood Classifier (MLC). Analisis perubahan biomassa dan stok karbon dilakukan melalui Stock-Difference Method. Perubahan biomassa dan stok karbon total untuk setiap tipe hutan dilakukan melalui perkalian Mg ha-1 dengan luas hutan. Hasil penelitian menunjukkan rerata biomassa pohon hutan lahan kering 364,99 ± 39,32 Mg ha-1, hutan rawa memiliki rerata biomassa pohon 643,95 ± 177,71 Mg ha-1, dan rerata biomassa pohon hutan mangrove 387,37 ± 31,10 Mg ha-1. Pada tahun 2000, DAS Batang Natal dan sekitarnya memiliki total luas tutupan hutan mencapai 93.396, dan tahun 2011 menurun dengan luas 67.961 ha. Dengan demikian, selama periode 2000-2011, luas tutupan hutan yang hilang mencapai 25.435 ha dengan rerata deforestasi 6,26% tahun-1 atau setara dengan 2.312 ha tahun-1. Rerata deforestasi hutan lahan kering mencapai 1,78% tahun-1 dengan emisi karbon sekitar 756.710 Mg CO2e tahun-1. Hutan rawa memiliki rerata deforestasi 4,48% tahun-1 dengan emisi 747.115 Mg CO2e tahun-1.

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The main source of biomass and carbon in the forest ecosystem are coming from trees, litter, dead wood and soil organic matter. Forest carbon stored in the above ground biomass (AGB) is the largest source; however it is also the most affected by deforestation and forest degradation. Deforestation and forest degradation is the second largest contributor of carbon emissions into the atmosphere which caused the climate change issue, after the use of fossil fuels by industry and transportation.

This research was conducted with the aim to assess the potential of AGB and carbon stocks based on forest tipology, as well as to determine the impact of deforestation on change of forest carbon stock in Batang Natal watershed and the surrounding area, Mandailing Natal, North Sumatra. Biomass of trees measurement performed through 15 rectangular sample plots with 20 m x 125 m in size. A total of 8 plots were established in the dryland forest, 4 plots in the mangrove forest and 3 plots in the swamp forest.

The total sampled area was around 3.75 ha. All trees with Diameter at Breast Height (DBH) ≥ 2 cm were recorded and measured. In the absence of destructive sampling measurements, biomass calculated using the existing allometric equations for the tropical forest. Analysis of the deforestation was carried out using remote sensing approach. Two-dates image pair for 2000 and 2011 were classified using a supervised maximum likelihood classifier (MLC). Analysis of biomass and carbon stock changes was carried out using stock-difference method. The difference in carbon stocks is multiplied by the area of each forest type to obtain the total carbon emissions.

The results showed that average of tree biomass for dryland forest is 364.99 ± 39.32 Mg ha-1, the swamp forest has an average of around 643.95 ± 177.71 Mg ha-1, and for mangrove forests is 387.37 ± 31.10 Mg ha-1. In 2000, the total forest cover of study area reached to 93396 ha, while in 2011 the forest cover decreased to 67961 ha. Thus, during the period 2000-2011, forest cover with total 25435 ha have been converted with rate of 6.26% year-1 or equivalent to 2312 ha year-1. The deforestation rate in the dryland forest reached 1.78% year-1 with carbon emissions estimated at 756710 Mg CO2e year-1. The swamp forest deforestation rate was approximately at 4.48% year-1, equivalent to 747115 Mg CO2e year-1 of carbon emissions."

"Tumbuhan Oryza rufipogon merupakan salah satu tumbuhan yang tumbuh di perairan Situ Lab. Alam. Tumbuhan O. rufipogon berperan sebagai substrat dan habitat fitoepifiton tetapi keberadaan fitoepifiton tersebut meghalangi cahaya yang dibutuhkan tumbuhan untuk berfotosintesis. Oleh karena itu, tumbuhan memproduksi senyawa metabolit sekunder untuk menghalangi penempelan fitoepifiton. Penelitian analisis metabolit sekunder O. rufipogon yang berperan sebagai antifouling dilakukan dengan merendam batang O. rufipogon perlakuan yang telah dihilangkan metabolit sekundernya dan batang kontrol di dalam Situ Lab. Alam selama 1 minggu. Ekstrak metabolit sekunder batang O. rufipogon dianalisis dengan HPLC dengan 2 panjang gelombang yang berbeda yaitu 254 nm dan 285 nm untuk mengetahui profil kromatografinya. Fitoepifiton yang menempel pada batang kontrol dan perlakuan dihitung kelimpahan, keanekaragaman, kemerataan, dan dominansi. Data penelitian menunjukkan bahwa kelimpahan fitoepifiton pada O. rufipogonbatang kontrol sebesar 287 individu/cm 2 dari 25 genera, dan batang perlakuan sebesar 657 sel/cm 2 dari 19 genera. Nilai kelimpahan dan keanekaragaman fitoepifiton pada kedua tumbuhan tersebut berbeda nyata berdasarkan analisis statistik uji-t. Persebaran fitoepifiton lebih merata pada batang kontrol dibanding batang perlakuan. Berdasarkan indeks dominansi, terdapat kecenderungan jenis tertentu yang mendominasi pada batang perlakuan. Hasil tersebut menjelaskan bahwa adanya pengaruh metabolit sekunder dalam menghambat pertumbuhan dan perkembangan epifiton yang menempel sebagai antifouling. Hasil analisis kromatografi HPLC melaporkan bahwa terdapat metabolit sekunder dari batang O. rufipogon yang diduga memiliki potensi sebagai antifouling.

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Oryza rufipogon plant is one of the emergent plants that grow in Situ Lab. Alam. The O. rufipogon acts as a substrate and habitat for phytoepiphyton, but the presence of phytoepiphyton capable to blocks the sunlight that support plants to fotosynthesis. Therefore, plant produce secondary metabolites to inhibit attachment of phytoepiphyton The study of the analysis of secondary metabolites of O. rufipogon which acted as antifouling was carried out by soaking the O. rufipogon treatment stem which had removed its secondary metabolites and control stem in the Situ Lab. Alam for 1 week. The secondary metabolite extract of the O. rufipogon stem was analyzed by HPLC with 2 different wavelengths of  254 nm and 285 nm to determine the chromatographic profile. Phytoepiphyton attached to the control and treatment stem was calculated for its abundance, diversity, evenness, and dominance.

The research data showed that the phytoepifiton abundance of O. rufipogon control stem was 287 individuals/cm 2 of 25 genera, and treatment stem was 657 organism/cm 2 of 19 genera. The value of abundance and diversity of phytoepiphyton in the two plants was significally different based on t-test statistical analysis. The distribution of phytoepiphyton is more evenly distributed in the control stem than the treatment stem. Based on the dominance index, there is a tendency for certain types to dominate in the treatment stem. These result explain the secondary metabolites affects for inhibit the growth and development of phytoepiphyton attachment and also act as antifouling. The result of HPLC chromatography analysis reported that there were secondary metabolites from the O. rufipogon stem thought to be potentially as antifouling."

"Penelitian ini bertujuan untuk menganalisis kelimpahan bentuk-bentuk mikroplastik yang terakumulasi pada air dan sedimen, menganalisis dan membandingkan jumlah kelimpahan mikroplastik pada saluran pencernaan bulu babi Diadema setosum yang diambil dari Gugusan Pulau Pramuka, Kepulauan Seribu, Jakarta. Pengamblan sampel air, sedimen dilakukan bedasarkan tiga titik mengelilingi pulau dan sampel bulu babi Diadema setosum dilakukan dari 10 lokasi berbeda mengelilingi pulau. Sampel air sebanyak 20 liter disaring dengan plankton net 300 µ, sampel sedimen sebanyak 200 gram dikeringkan menggunakan oven, dan saluran pencernaan bulu babi di larutkan menggunakan HNO3 65%. Semua sampel dijenuhkan dengan larutan NaCl agar partikel mikroplastik mengapung di permukaan. Setiap sampel diambil sebanyak 1 ml, kemudian diletakan di kamar hitung Sedgewick rafter untuk diamati dibawah mikroskop dan dihitung bedasarkan jenis mikroplastik yang ditemukan. Hasil penelitian menunjukan kelimpahan mikroplastik paling tinggi pada Pulau Panggang sejumlah 148,00 partikel L-1 pada air, 217.100 partikel kg-1 pada sedimen, dan 1.264,00 partikel ind-1 pada saluran pencernaan bulu babi. Disusul oleh Pulau Pramuka dengan kelimpahan mikroplastik sejumlah 132,67 partikel L-1 pada air, 136.800 partikel kg-1 pada sedimen, dan 1.082,7 partikel ind-1 pada saluran pencernaan bulu babi.. Jumlah kelimpahan mikroplastik terendah ada pada Pulau Semak Daun sejumlah 92,67 partikel L-1 pada air, 121.066 partikel kg-1 pada sedimen, dan 923,33 partikel ind-1 pada saluran pencernaan bulu babi. Terdapat perbedaan yang signifikan jumlah kelimpahan mikroplastik pada sampel saluran pencernaan bulu babi pada Pulau Panggang, Pulau Pramuka, dan Pulau Semak Daun.

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This study aims to analyze the abundance of forms of microplastics that accumulate in water and sediment, analyze and compare the abundance of microplastics in the digestive tract ofsea ​​urchins Diadema setosum taken from the Pramuka Island Cluster, Seribu Islands, Jakarta. Water and sediment samples were taken from three points around the island and samples ofsea ​​urchins were Diadema setosum taken from 10 different locations around the island. A 20 liter water sample was filtered with a plankton net of 300 , a sediment sample of 200 grams was dried using an oven, and the digestive tract of sea urchins was dissolved using 65% HNO3. All samples were saturated with NaCl solution so that the microplastic particles floated on the surface. Each sample was taken as much as 1 ml, then placed in thecounting room Sedgewick rafter to be observed under a microscope and calculated based on the type of microplastic found. The results showed that the highest abundance of microplastics was on Panggang Island with 148.00 L-1 particles in water, 217,100 kg-1 particles in sediment, and 1,264,00 ind-1 particles in the digestive tract of sea urchins. Followed by Pramuka Island with an abundance of microplastics of 132.67 L-particles1 in water, 136,800 kg-particles1 in sediments, and 1,082.7 ind-particles1 in the digestive tract of sea urchins.. The lowest abundance of microplastics was found on Pulau Semak Daun with 92.67 particles L-1 in water, 121,066 particles kg-1 in sediments, and 923.33 particles ind-1 in the digestive tract of sea urchins. There were significant differences in the abundance of microplastics in the digestive tract samples of sea urchins on Panggang Island, Pramuka Island, and Semak Daun Island."

"Penelitian ini bertujuan menganalisis kelimpahan serta bentuk mikroplastik yang terkandung pada saluran pencernaan dan insang ikan kakap putih (Lates calcarifer) di tambak Desa Muara Teluknaga, Tangerang. Sampel sebanyak 10 individu dengan ukuran ±31 cm diisolasi insang serta saluran pencernaanya (lambung dan usus). Analisis mikroplastik pada saluran pencernaan dengan cara melarutkan isi lambung dan usus dengan 30 mL akuades serta mengamati preparat 1 cm² dinding usus dan dinding lambung dibawah mikroskop optik cahaya. Sepanjang 1 cm lembar insang dijadikan preparat, kemudian diamati dibawah mikroskop optik cahaya. Hasil yang didapatkan terdapat mikroplastik bentuk fiber, film, fragmen dan granula dengan ukuran berkisar 20 – 3160 µm. Rata-rata kelimpahan mikroplastik pada larutan isi lambung dan larutan isi usus yaitu 677 ± 241,34 partikel/ind dan 983 ± 211,4 partikel/ind. Sekitar 9,68% dan 11,9% mikroplastik masih ditemukan pada dinding lambung dan usus setelah proses pencucian menggunakan akuades. Rata-rata kelimpahan mikroplastik yang ditemukan pada dinding lambung dan usus yaitu 72,55  ±  34,9 partikel/ind dan 132,72 ± 42,16 partikel/ind. Hal ini menunjukkan kelimpahan mikroplastik pada usus lebih tinggi dibandingkan pada lambung. Ada perbedaan kelimpahan mikroplastik pada insang berdasarkan lembar insangnya. Jumlah rata-rata mikroplastik pada lembar insang pertama hingga keempat pada insang ikan kakap putih yaitu 41,4 partikel per lembar; 25,04 partikel per lembar; 23,52 partikel per lembar; dan 19,53 partikel per lembar. Sementara jumlah rata-rata mikroplastik yang ditemukan pada 10 sampel insang adalah 109,49±38,17 partikel/ind.

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This study aims to analyzed the abudance and type of microplastic in digestive tract and gill of  barramundi  (Lates calcarifer) at Desa Muara pond Teluknaga, Tangerang, Banten. Gills and digestive tract (stomach and intestine) of 10 barramundi with size of about 31 cm were isolated. Microplastic abundance analysis in digestive tract by dissolving the content of stomach and intestine in 30 mL distilled water and observing preparations 1 cm² intestinal and wall under microscope. Gills sample with size of 1 cm of gill sheet made as preparations, then were observed under light optical microscope. The results obtained are microplastic types of fibers, films, fragments and granules with sizes ranging from 20 µm – 3160 µm. Average microplastic abundance in stomatch contents solution and intestine contents solution were 677 ± 241,34 particle/ind and 983 ± 211,4  particle/ind. On average about 9,68% and 11,9% of microplastics are still attached to the stomach and intestine wall after the washing process using distilled water. Average microplastic abundance in stomach wall and intestine wall were 72,55  ±  34,9 particle/ind and 132,72 ± 42,16  particle/ind. It showed that abundance in the intestine is higher than in the stomach. There is a difference in microplastic abundance on the gills based on the gill sheet. The average number of microplastics in the first to fourth gill sheets in the barramundi was 41.4 particles per sheet; 25.04 particles per sheet; 23.52 particles per sheet; and 19.53 particles per sheet. while While the average number of microplastics found in 10 gills samples was 109.49 ± 38.17 particles / ind.

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"Penelitian bertujuan untuk menilai kualitas Sungai Cibareno di Banten, Jawa Barat. Penelitian dilakukan dengan menyatakan hasil identifikasi makrozoobentos sebagai bioindikator yang diambil dari 9 stasiun penelitian di Sungai Cibareno. Analisis makrozoobentos dalam rangka pemantauan kualitas Sungai Cibareno menggunakan Biological Monitoring Working Party - Average Score per Taxon (BMWP - ASPT) pada tingkat famili atau kelompok makrozoobentos berdasarkan toleransinya terhadap cemaran. Hasil penelitian menunjukkan bahwa bagian hulu, tengah, dan hilir sungai Cibareno berturut - turut memiliki nilai ASPT sebesar 5,3, 5,5 dan 4,8. Secara keseluruhan Sungai Cibareno memiliki nilai ASPT 5,2 dan termasuk dalam tingkat pencemaran ringan.

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The main objective of this study was to assess the quality of Cibareno River in Banten, West Java. The research was conducted by explain the result of identification of macrozoobenthos as the indicator which taken form 9 research stations in Cibareno River. The analysis of macrozoobenthos in order to monitor the quality of Cibareno River is using Biological Monitoring Working Party - Average Score per Taxon (BMWP - ASPT) on the family level or groups of macrozoobenthos based on the tolerance of the organism against pollutant. The result showed that the head, the middle and the downstream of Cibareno River has the ASPT score about 5,3, 5,5 and 4,8. The entire score of Cibareno River is 5,2 and it means that the pollutant level is low."