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"Telah dilakukan penelitian mengenai kepadatan populasi, pola persebaran, morfometrik, kecenderungan waktu makan, dan rekonstuksi lubang pada spesies kepiting Metopograpsus latifrons (White, 1987) di Pulau Panjang, Serang, Banten. Penelitian ini bertujuan untuk mengetahui kepadatan populasi, pola distribusi, morfometri, pola makan serta rekonstruksi lubang kepiting M. latifrons. Kepadatan kepiting M. latifrons rata-rata di pulau panjang 26 individu per m2, dengan pola persebaran mengelompok.Hasil penghitungan morfometrik pada masing-masing jenis kelamin allometrik (b≠3), dan tidak terdapat perbedaan signifikan pada jantan dan betina (P<0, 01). Hasil pengamatan pola makan menunjukkan jam makan tertentu pada jenis kepiting tersebut. Hasil rekonstruksi lubang kepiting M. latifrons memperlihatkan bentuk yang bercabang-cabang, namun hanya memiliki satu pintu masuk dan keluar.

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Population density, dispersion pattern, morphometric, feeding time, and crab burrow reconstruction was studied for mangrove leave feeder crab Metopograpsus latifrons (White, 1987) in Pulau Panjang, Serang, Banten. This study aims to determine the population density, distribution pattern, morphometric differences between male and female, feeding pattern and burrow reconstruction of mangrove crab M. latifrons. Indirect technique by counting burrow opening have been employed to measure crab population density, average population density of M. latifrons in Pulau Panjang is 26 individual per m2, with clumped dispersion pattern.Morphometric analysis result shows allometric pattern (b≠3), and shows no significant differences between male and female (P<0, 01). Feeding activities of M. latifrons is time independent. Burrow reconstruction by making resin cast shows branching burrow shape, and only have one opening. However, the importance of burrow morphology is not yet confirmed."

"Mangrove memiliki peranan yang sangat besar, terutama bagi pulau kecil seperti Pulau Panjang yang rentan akan pengaruh arus dan gelombang. Penelitian mengenai perubahan mangrove di Pulau Panjang dilakukan untuk mengetahui perubahan distribusi area dan kerapatan tajuk mangrove selama kurun waktu 17 tahun (1991-2008) melalui interpretasi citra Landsat yang dikaitkan dengan variabel perkembangan jumlah penduduk, perubahan penutup lahan dan kondisi fisik perairan Pulau Panjang. Dengan menggunakan metode analisis deskriptif kualitatif secara keruangan, terungkap bahwa mangrove di Pulau Panjang terus mengalami degradasi, baik dari segi luas area maupun kerapatan tajuknya, akibat dari peningkatan abrasi pantai, pertambahan jumlah penduduk dan konversi area mangrove, yang terutama terjadi di bagian luar area mangrove yang berbatasan dengan lahan terbangun maupun lahan terbuka.

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Mangroves has very important function, especially for isle like Panjang Island which susceptable from wave and current influence. The research about mangroves change at Panjang Island is done to detect distribution change area and coronet closeness mangrove during range of time 17 year (1991-2008) pass image landsat interpretation relating with citizen total development variable, land cover change and waters physical condition in Panjang Island. By using qualitative descriptive analysis method according to spatial, revealed that is mangrove at long island then experiences degradation, either from vast aspect area also the coronet closeness, effect of enhanced abrasi coast, citizen total increase and conversion area mangrove, most off all happen at exterior area mangrove that abut on tune awaken also opened tune."

"[ABSTRAKPenelitian mengenai peran siput Terebralia dalam mengurai serasah mangrove dan menyimpan karbon telah dilakukan pada bulan November hingga Desember 2013. Hasil penelitian kepadatan, Terebralia palustris memiliki nilai kepadatan yang paling tinggi yaitu 25 individu/m2. Sedangkan Terebralia sulcata memiliki nilai kepadatan yang lebih rendah yaitu 15 individu/m2. Kandungan karbon yang tersimpan dalam tubuh T. palustris berkisar antara 16,27?18,89% dengan rata-rata sebesar 17,45%. Sedangkan karbon yang tersimpan dalam tubuh T. sulcata berkisar antara 15,98?17,62% dengan rata-rata 16,87%. Potensi penyimpanan karbon oleh T.palustris sebesar 4374 gr C/m2 dan T. sulcata, berpotensi menyimpan karbon sebesar 2609 gr C/m2. Berdasarkan analisis statistik, terdapat korelasi antara panjang maupun berat T. palustris terhadap total karbon dengan masing-masing P= 0,001 dan P= 0,002. Sebaliknya, pada T.sulcata tidak terdapat korelasi antara panjang maupun berat cangkangnya terhadap total karbon yang dikandungnya dengan masing-masing P= 0,071 dan P= 0,289. Penelitian mengenai penguraian seresah dilakukan hanya menggunakan Terebralia dewasa yaitu, Terebralia palustris lebih dari 5 cm dan Terebralia sulcata lebih dari 3 cm. Dalam pengambilan data selanjutnya, dibuat 30 titik kuadran dengan ukuran 0,25 x 0,25 m yang ditentukan secara acak. Rata-rata persentase penguraian serasah oleh T. palustris adalah sebesar 3,48% ± 0,18 /hari untuk R. apiculata dan 8,28% ± 0,13 /hari untuk R. stylosa. Sedangkan T. sulcata mengurai serasah rata-rata sebesar 4,07% ± 0,12 /hari untuk R. apiculata dan 4,93 % ± 0,15 /hari untuk R. stylosa. Hasil penelitian juga menunjukkan bahwa tidak ditemukan korelasi antara panjang dan berat T.palustris dengan persentase penguraiannya. Begitu pula dengan T.sulcata, tidak ditemukan korelasi antara berat dengan laju penguraiannya. Sebaliknya, terdapat korelasi antara panjang T. sulcata dengan persentase penguraiannya.

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ABSTRACTResearch on the role of Terebralia snails in mangrove leaf litter removal and store carbon was held in November and December 2013. Density of research results, Terebralia palustris has the highest density value of 400 individu/m2 . While Terebralia sulcata has a lower density value is 240 individu/m2. Carbon content stored in the body T. palustris ranged from 16.27 to 18.89 % with an average of 17.45 % . While the carbon stored in the body of T. sulcata ranged from 15.98 to 17.62 % with an average of 16.87 %. Potential carbon storage by T. palustris is 4374 g C/m2, whereas T. sulcata potentially storing carbon at 2609 g C/m2. Measurement of litter removal activity was carried out in mangrove dominated by Rhizophora sp. The research location was located in the intertidal mangrove affected part tide. Research conducted using only adult Terebralia such as, Terebralia palustris more than 5 cm and Terebralia sulcata more than 3 cm. In subsequent data collection, we made 30 points quadrant with 0.25 x 0.25 m size was determined at random. The average percentage of leaf litter removal by T. palustris is equal to 3,48% ± 0,18 / day for R. apiculata and 8,28% ± 0,13/ day for R. stylosa . While T. sulcata litter parse an average of 4,07% ± 0,12 / day for R. apiculata and 4,93 % ± 0,15 / day for R. stylosa . The results also show that there were no correlation was found between the length and weight percentage T.palustris with decay. Similar with T.sulcata, no correlation was found between the weight of the rate of decay. Instead, there is a correlation between the length of T. sulcata with the percentage of decay.;Research on the role of Terebralia snails in mangrove leaf litter removal and store carbon was held in November and December 2013. Density of research results, Terebralia palustris has the highest density value of 400 individu/m2 . While Terebralia sulcata has a lower density value is 240 individu/m2. Carbon content stored in the body T. palustris ranged from 16.27 to 18.89 % with an average of 17.45 % . While the carbon stored in the body of T. sulcata ranged from 15.98 to 17.62 % with an average of 16.87 %. Potential carbon storage by T. palustris is 4374 g C/m2, whereas T. sulcata potentially storing carbon at 2609 g C/m2. Measurement of litter removal activity was carried out in mangrove dominated by Rhizophora sp. The research location was located in the intertidal mangrove affected part tide. Research conducted using only adult Terebralia such as, Terebralia palustris more than 5 cm and Terebralia sulcata more than 3 cm. In subsequent data collection, we made 30 points quadrant with 0.25 x 0.25 m size was determined at random. The average percentage of leaf litter removal by T. palustris is equal to 3,48% ± 0,18 / day for R. apiculata and 8,28% ± 0,13/ day for R. stylosa . While T. sulcata litter parse an average of 4,07% ± 0,12 / day for R. apiculata and 4,93 % ± 0,15 / day for R. stylosa . The results also show that there were no correlation was found between the length and weight percentage T.palustris with decay. Similar with T.sulcata, no correlation was found between the weight of the rate of decay. Instead, there is a correlation between the length of T. sulcata with the percentage of decay.;Research on the role of Terebralia snails in mangrove leaf litter removal and store carbon was held in November and December 2013. Density of research results, Terebralia palustris has the highest density value of 400 individu/m2 . While Terebralia sulcata has a lower density value is 240 individu/m2. Carbon content stored in the body T. palustris ranged from 16.27 to 18.89 % with an average of 17.45 % . While the carbon stored in the body of T. sulcata ranged from 15.98 to 17.62 % with an average of 16.87 %. Potential carbon storage by T. palustris is 4374 g C/m2, whereas T. sulcata potentially storing carbon at 2609 g C/m2. Measurement of litter removal activity was carried out in mangrove dominated by Rhizophora sp. The research location was located in the intertidal mangrove affected part tide. Research conducted using only adult Terebralia such as, Terebralia palustris more than 5 cm and Terebralia sulcata more than 3 cm. In subsequent data collection, we made 30 points quadrant with 0.25 x 0.25 m size was determined at random. The average percentage of leaf litter removal by T. palustris is equal to 3,48% ± 0,18 / day for R. apiculata and 8,28% ± 0,13/ day for R. stylosa . While T. sulcata litter parse an average of 4,07% ± 0,12 / day for R. apiculata and 4,93 % ± 0,15 / day for R. stylosa . The results also show that there were no correlation was found between the length and weight percentage T.palustris with decay. Similar with T.sulcata, no correlation was found between the weight of the rate of decay. Instead, there is a correlation between the length of T. sulcata with the percentage of decay., Research on the role of Terebralia snails in mangrove leaf litter removal and store carbon was held in November and December 2013. Density of research results, Terebralia palustris has the highest density value of 400 individu/m2 . While Terebralia sulcata has a lower density value is 240 individu/m2. Carbon content stored in the body T. palustris ranged from 16.27 to 18.89 % with an average of 17.45 % . While the carbon stored in the body of T. sulcata ranged from 15.98 to 17.62 % with an average of 16.87 %. Potential carbon storage by T. palustris is 4374 g C/m2, whereas T. sulcata potentially storing carbon at 2609 g C/m2. Measurement of litter removal activity was carried out in mangrove dominated by Rhizophora sp. The research location was located in the intertidal mangrove affected part tide. Research conducted using only adult Terebralia such as, Terebralia palustris more than 5 cm and Terebralia sulcata more than 3 cm. In subsequent data collection, we made 30 points quadrant with 0.25 x 0.25 m size was determined at random. The average percentage of leaf litter removal by T. palustris is equal to 3,48% ± 0,18 / day for R. apiculata and 8,28% ± 0,13/ day for R. stylosa . While T. sulcata litter parse an average of 4,07% ± 0,12 / day for R. apiculata and 4,93 % ± 0,15 / day for R. stylosa . The results also show that there were no correlation was found between the length and weight percentage T.palustris with decay. Similar with T.sulcata, no correlation was found between the weight of the rate of decay. Instead, there is a correlation between the length of T. sulcata with the percentage of decay.]"

"Penelitian komunitas ikan yang tertangkap dengan jaring push net dan kaitannya dengan produksi serasah hutan mangrove di Pulau Panjang, Teluk Banten telah dilakukan pada bulan Oktober?Desember 2014 saat pasang purnama. Tujuan penelitian untuk melihat keanekaragaman dan komunitas ikan serta mengetahui besarnya serasah yang dilepas ke perairan laut dan hubungan antara C, N, P serasah dengan C, N, P Chandidae (famili ikan dominan dalam penelitian). Metode penangkapan ikan dengan push net secara manual dan pemasangan perangkap serasah berupa paralon yang mengarah ke perairan laut di Stasiun 1 dan 2. Hasil tangkapan ikan yaitu 1.770 individu (14 famili, 16 marga, dan 22 spesies). Jumlah terbanyak di Stasiun 1 (1.213) dan bulan November (749). Nilai H? di Stasiun 1 (0,71) dan 2 (0,81) adalah rendah dan sedang, didukung rendahnya nilai E dan tingginya D. Sebanyak 51% ikan yang tertangkap adalah Ambassis gymnocephalus dari famili Chandidae. Ikan komersial yang tertangkap yaitu dari famili Mugilidae dan Serranidae. Mayoritas ikan yang tertangkap juga merupakan ikan penetap sejati (true resident) yaitu berjumlah 1.248 ekor. Biomassa serasah dan Chandidae terbesar yaitu di bulan Desember (219,49 g dan 75,85 g). Sementara Stasiun 1 memberikan biomassa terbesar untuk serasah (162,99 g) dan Stasiun 2 untuk Chandidae (19,14 g). Nilai serasah terbanyak yang dilepas ke laut yaitu pada bulan Desember di Stasiun 1 (47,47 g/m³/s). Nilai koefisien relasi C, N, P serasah dengan C, N, P Chandidae memberikan hasil yang sama yaitu 0,999. Model regresi yang terbentuk berturutturut yaitu Chandidae = 0,889 C Serasah, Chandidae = 11,367 N Serasah, dan Chandidae = 5,407 P Serasah.

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The research of fish community and its correlation with the production of mangrove forest litter in Panjang Island, Banten Bay had been conducted from October to December 2014 while spring tide. The research?s aim was to know the fish diversity and fish community, to identify mangrove litter?s value to the sea and correlation between C, N, P of mangrove litter and C, N, P of Chandidae (the biggest fish family captured). The method was used push net manually active and also water pipes were put to captured mangrove?s litter to the sea at Station 1 and 2. In total, 1770 species were captured (14 families, 16 genera, and 22 species), the most large number were at Station 1 and in November (1.213 and 749 individus). H? value at Station 1 was low (0,71), meanwhile at Station 2 was moderate (0,81). It supported by low E value. 51% fish captured was Ambassis gymnocephalus from Chandidae family. Economic value fish captured were Mugilidae and Serranidae. Mostly fish captured also were true resident fish (1.248). The biggest biomass of mangrove litter was been at Station 1 (162,99 g), while Chandidae was been at Station 2 (19,14 g). The biggest removed mangrove litter to the sea water was in December and Station 1 (47,47 g/m³/s). The Pearson correlation from C, N, P of mangrove litter and C, N, P of Chandidae gave the same value (0,999). The model of Linear Regression were Chandidae = 0,889 C Mangrove litter, Chandidae = 11,367 N Mangrove litter, dan Chandidae = 5,407 P Mangrove litter."

"Penelitian mengenai potensi stok dan serapan karbon ekosistem mangrove di Pulau Tunda telah dilakukan pada bulan April--Juni 2016. Penelitian ini bertujuan untuk menganalisis potensi stok dan serapan karbon ekosistem mangrove, mengetahui spesies mangrove yang memiliki stok dan serapan karbon potensial, dan memperoleh estimasi harga karbon ekosistem mangrove di Pulau Tunda. Penentuan lokasi pengambilan sampel dilakukan secara purposive sampling pada enam stasiun bagian selatan dan timur Pulau Tunda. Berdasarkan hasil analisis kandungan karbon ekosistem mangrove Pulau Tunda, diperoleh nilai biomassa 196,76 ton/ ha, stok karbon 91,48 ton/ ha, dan serapan karbon 335,06 ton/ ha. Proporsi stok dan serapan karbon terbesar tingkat pohon dan pancang mangrove di Pulau Tunda berasal dari spesies Excoecaria agallocha yaitu 107,47 ton/ ha dan 392,23 ton/ ha. Ekosistem mangrove Pulau Tunda memiliki estimasi harga karbon sebesar Rp 88.690.382--Rp 221.725.955 ton/ ha.

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Research on the carbon uptake and stock potency of mangrove ecosystem in Tunda Island was conducted on April--June, 2016. The aim of the study was to analyze the mangrove ecosystem potency of carbon stock and its uptake, to know the mangrove species that has potential carbon stock and its uptake, and to estimate the potency of carbon price mangroveecosystem in Tunda Island. The location of sampling was determined by purposive sampling at six stations of south and east part Tunda Island.

The analysis result of carbon content at Tunda Island mangrove ecosystem showed that, biomass 196.76 ton/ ha, carbon stock 91.48 ton/ ha, and carbon uptake 335.06 ton/ ha. The largest proportion of the stock and carbon uptake at the level of mangrove tree and sapling in Tunda Island derived from Excoecaria agallocha, that is 107.47 ton/ ha and 392.23 ton/ ha. Tunda Island mangrove ecosystem have an estimated total carbon price of Rp 88.690.382--Rp 221.725.955 ton/ ha."

"Penelitian mengenai analisis kerapatan dan persebaran vegetasi mangrove menggunakan teknologi penginderaan jauh berlokasi di Pulau Tunda, Kabupaten Serang, Provinsi Banten perlu dilakukan untuk memberikan informasi dan data ilmiah mengenai vegetasi mangrove di Pulau Tunda. Penelitian tersebut bertujuan untuk mengetahui komposisi spesies vegetasi mangrove, kerapatan vegetasi mangrove, dan zonasi vegetasi mangrove. Penelitian ini telah dilakukan pada 1--5 April 2016. Metode penelitian yang digunakan antara lain purposive sampling, metode transek garis berpetak, dan pengolahan citra landsat 8 OLI. Hasil penelitian menunjukkan bahwa komposisi mangrove sejati terdiri atas 9 spesies dari 7 famili, sedangkan mangrove asosiasi terdiri atas 9 spesies dari 8 famili. Kerapatan vegetasi mangrove berdasarkan transfomrasi NDVI (0,194) dan EVI (0,085) termasuk ke dalam kelas kerapatan mangrove jarang dan tingkat kesehatan mangrove rendah. Koefisien korelasi antara NDVI (0,147) dan EVI (0,007) dengan luas basal area berkolerasi positif tetapi tergolong rendah. Zonasi mangrove sejati yang paling dominan ialah 1) Rhizophora stylosa, 2) Excoecaria agallocha, dan 3) Sonneratia caseolaris, sedangkan zonasi mangrove asosiasi ialah 1) Pongamia pinnata, 2) Morinda citrifolia, dan 3) Pandanus odoratissima. Mangrove di Pulau Tunda memiliki kelas kerapatan jarang dan persebaran acak.

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Research on analysis of the density and distribution of mangrove vegetation using remote sensing technology in Tunda Island, Serang Regency, Banten Province, was needed to give information and scientific data about mangrove vegetation in Tunda Island. The study aims to know species composition of mangrove vegetation, mangrove vegetation density, and mangrove vegetation zonation. The study was conducted on 1st -- April 5th, 2016. The method was used purposive sampling, partition line transect, and landsat satellite image 8 OLI processing.

The results showed that true mangrove composition consist of 9 species from 7 families, while associate mangrove consist of 9 species from 8 families. Mangrove vegetation density based transformation of NDVI (0,194) and EVI (0,085) was considered as rare class of mangrove density and mangrove healthy as low grade. Correlation coefficient between NDVI (0,147) and EVI (0,007) with basal area was considered as positive correlation but low grade correlation. The most dominant zonation of true mangrove vegetation were 1) Rhizophora stylosa, 2) Excoecaria agallocaha, and 3) Sonneratia caseolaris, while zonation of associate mangrove were 1) Pongamia pinnata, 2) Morinda citrifolia, and 3) Pandanus odoratissima. Mangrove in Tunda Island has rare class of density and random distribution."

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Ketersediaan jasa ekosistem lamun sangat bergantung pada kondisi biofisik dan dinamika ekosistem terutama dari faktor antropogenik. Ekosistem lamun saat ini sedang mengalami krisis karena semakin terpengaruh oleh perubahan yang diakibatkan oleh aktivitas manusia di zona pesisir. Ini menghambat kelangsungan ekosistem lamun. Riset ini mengevaluasi indeks kesehatan ekosistem lamun dan menentukan potensi keberlanjutan pemanfaatan jasa ekosistem lamun di pesisir Pulau Panjang, Serang, Banten dengan menggunakan pendekatan kuantitatif serta metode campuran. Studi ini menemukan bahwa Pulau Panjang memiliki keragaman spesies lamun yang cukup tinggi dengan ditemukan 7 spesies lamun termasuk Enhalus acoroides yang cukup mendominasi pesisir pulau. Indeks kesehatan lamun juga cukup tinggi yang berkisar di antara 60 – 70%. Hasil riset juga membuktikan bahwa perilaku masyarakat yang konsumtif memicu pemanfataan jasa ekosistem yang tinggi. Pemanfaatan jasa ekosistem lamun yang tinggi dapat mengecilkan potensi pemanfaatan secara berkelanjutan. Ini dikarenakan tingkat pendidikan masyarakat yang tergolong rendah. Oleh karena itu, sosiasliasi dan pengelolaan atas ekosistem lamun perlu segera diimplementasikan.

 

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The existence of seagrass ecosystem services is dependent on biophysical conditions and the dynamics of the ecosystem, especially from anthropogenic factors. Seagrass ecosystems are currently in crisis because they are increasingly affected by changes caused by human activities in the coastal zone. This inhibits the sustainability of the seagrass ecosystem. This research evaluates the health index of seagrass ecosystems and determines the potential for sustainable utilization of seagrass ecosystem services on the coast of Pulau Panjang, Serang, Banten using quantitative approaches and mixed methods. The study found that Panjang Island have a high diversity of seagrass species with 7 seagrass species found, including Enhalus acoroides which dominated the coast. Habitat structure index represents seagrass health that was obtained is quite high which ranges between 60 - 70%. Another result of this research also proves that high consumptive behavior triggers the high utilization of ecosystem services. The utilization of seagrass ecosystems can reduce the potential for sustainable utilization of seagrass ecosystems. This is due to the communities’ low education. Therefore, management of seagrass ecosystems needs to be implemented immediately so that sustainable utilization of seagrass ecosystem services can be actualized.

 

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"Keberadaan ekosistem hutan mangrove di kawasan Cagar Alam Pulau Dua, Desa Sawah Luhur, Kecamatan Kasemen, Kabupaten Serang, Provinsi Banten saat ini banyak memberikan sumber penghidupan yang nyata bagi masyarakat sekitar yang memanfaatkan ekosistem hutan mangrove. Penelitian ini bertujuan mengetahui nilai valuasi ekonomi total hutan mangrove untuk menyusun strategi pengelolaan hutan mangrove di kawasan Cagar Alam Pulau Dua. Penelitian ini menggunakan metode survei dengan analisis data kualitatif dan kuantitatif. Perhitungan valuasi ekonomi total hutan mangrove di kawasan Cagar Alam Pulau Dua seluas 30 Ha adalah Rp 4 milyar/tahun atau Rp 144 juta/ha/tahun. Selanjutnya masing-masing nilai manfaat dibuatkan usaha skenario pemanfaatan di kawasan Cagar Alam Pulau Dua dengan analisis Net Present Value (NPV). Dari nilai NPV ini dapat disusun strategi pengelolaan wilayah pesisir hutan mangrove di kawasan Cagar Alam Pulau Dua yang paling baik dan menguntungkan dengan memanfaatkan lahan untuk usaha pemancingan dengan nilai Rp 48 milyar.

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The presence of mangrove forest in the Pulau Dua Nature Reserve currently provides many tangible livelihood for the communities that use mangrove forest ecosystem. This study aims to determine the valuation of the total economic value of mangrove forests to develop strategies for the management of mangrove forest in the Pulau Dua Nature Reserve. This study uses survey with qualitative and quantitative data analysis. Calculation of total economic valuation of mangrove forest in the Pulau Dua Nature Reserve area of 30 ha obtained is Rp 4 billion/year or Rp 144 million/ha/year. Furthermore, each of the value of the benefit created for use in the business scenario Pulau Dua Nature Reserve with Net Present Value (NPV) analysis can be arranged mangrove coastal zone management strategy in the Pulau Dua Nature Reserve most excellent and profitable is to use the land for fishing effort with a value of Rp 48 billion."

"ABSTRAKTelah dilakukan penelitian mengenai struktur komunitas kepiting dan potensi kepiting bakau Scylla oceanica di ekosistem mangrove Kecamatan Panimbang, Banten, bertujuan untuk mengetahui stuktur komunitas kepiting dan potensikepiting bakauserta mengetahui indeks persepsi masyarakatyang tinggal di sekitar hutan mangrove. Pengambilan sampel vegetasi mangrove menggunakan metode Line Transect Plot,dan untuk sampel kepiting dilakukan dengan metoda transek pada tiga stasiun pengamatan. Setiap stasiun dibuat tiga plot dengan tiga kali ulangan. Hasil yang diperoleh ditemukan 6 jenis mangrove yaituAvicennia alba, Bruguiera sp, Excoecaria agollocha, Lumnitzera littorea, Rhizopora apiculata, dan Sonneratia alba serta4 suku kepiting dengan 14 jenis dari 354 kepiting, yaitu sukuGrapsidae, Sesarmidae, Ocypodidae, dan Dotillidae. Rata-rata kepadatan kepiting 36 ind/m2 - 43 ind/m2, indeks keanekaragaman 1,86-2,01, indeks keseragaman 0,706 - 0,763, indeks dominansi 0,142 - 0,166, dan pola distribusi mengelompok Id = 1,282-1,494 . Indeks kesamaan antara stasiun 1, 2, dan 3, hampir sama 78,01 - 85,96 . . Rata-rata kepadatan kepiting bakau Scylla oceanica yaitu 19,1ekor/100 m2. Berat kepiting bakau betina berkisar 95 ndash; 495 g dan kepiting jantan berkisar 100 ndash; 420 g. Lebar karapaks kepiting bakau betina 6,8 ndash; 14,5 cm dan kepiting bakau jantan 7,1 ndash; 13,5 cm. Pola pertumbuhan kepiting bakau jantan dan betina menunjukkan tipe allometrik negatif, dengan pola distribusi mengelompok Id = 1,5176 . Indeks persepsi masyarakat tentang potensi kepiting bakau di Panimbang, Banten tergolong baik 78 . Potensi hasil tangkapan kepiting bakau per bulan sebesar 2.820 ndash; 4.440 kg dan pendapatan penduduk dari sektor ini berkisar Rp169.200.000,00- sampai Rp266.400,00,- per-bulan.

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ABSTRACTA research has been conducted regarding the structural type of the crab community and the potential of the mangrove crab Scylla oceanica at mangrove ecosystem station Panimbang sub district, Banten. The objective of the research is to understand the structure of the crab community and the potential of the mangrove crab and to discover the perception index of communities living around the mangrove forest. Sampling of the local mangrove vegetation uses Line Transect Plot and the crabs is using the transect method at the three observation station. Three plots at each location was observed and executed three times. The result was as follows 6 types of mangrove which areAvicennia alba, Bruguiera sp, Excoecaria agollocha, Lumnitzera littorea, Rhizopora apiculata, and Sonneratia alba including 4 family of crabs from 14 species from the 354 crabs caught, which are family of Grapsidae, Sesarmidae, Ocypodidae, and Dotillidae. The population density of being 36 ind m2 43 ind m2, the diversity index of crabs is 1,86 ndash 2,01, the uniformity index of mangrove crabs is 0,706 0,763, dominancy index around 0,142 ndash 0,166, and the distribution pattern of grouping crabs Id 1,282 ndash 1,494 . Uniformity index between station 1, 2 and 3 are almost similar 78,01 85,96 . Population density of mangrove crabs Scylla oceanica are19,1 ind 100 m2. The average weight of female mangrove crabs caught were around 95 495 g, the average weight of male crabs being at 100 420 g. Diameter of carapace of the female crabs are around 6,8 ndash 14,5 cm and the average carapace diameter of male crabs were found at 7,1 ndash 13,5 cm. The growth pattern of male and female mangrove crabs is the negative aloometric type, with a grouping distribution value Id 1,5176 . The community perception index regarding the potential of the mangrove crabs at Panimbang sub district, Banten is considered good 78 . The potential catch mud crabs per month of 2.820 4.440 kg and incomes of population in this sector ranges Rp169.200.000,00 until Rp266.400.000,00 per month."

"ABSTRAKPenelitian telah dilakukan di kawasan hutan mangrove cagar alam Pulau DuaSerang, Banten pada bulan September hingga November 2011. Tujuan daripenelitian adalah untuk mengetahui produksi dan potensi unsur hara, seratamenduga pelepasan unsur hara dari serasah ke lingkungan perairan laut.Pengambilan sampel untuk analisis vegetasi mangrove dilakukan denganmenggunakan metode transek-kuadrat. Guguran serasah ditangkap dengan littertrapdan besarnya serasah yang dilepas ke perairan laut dilakukan pengujiandengan menyaring serasah di aliran air yang menghubungkan antara hutanmangrove dengan perairan laut, untuk produksi potensial unsur hara dari serasahdilakukan analisis unsur hara (C, N, P) di laboratorium. Hasil penelitianmenunjukkan bahwa jenis mangrove yang mendominasi yaitu Avicennia marinadan Rhizophora apiculata dengan kerapatan relatif sebesar 51,43% dan 36,19%.Hutan mangrove cagar alam Pulau Dua menghasilkan total rata-rata serasahsebesar 4,05 gr/m2/hari atau 14,78 ton/ha/tahun dengan penyumbang terbesar dariserasah daun. Produksi potensial unsur hara serasah yang dihasilkan sebesar0,3456 gr-C/m2/hari atau 1,2616 ton-C/ha/tahun, 0,0091 gr-N/m2/hari atau 0,0333ton-N/ha/tahun, 0,0008 gr-P/m2/hari atau 0,0031 ton-P/ha/tahun. Hutan mangrovecagar alam Pulau Dua turut menyumbangkan serasahnya ke perairan laut sebesar855,4724 gr/m3/hari.

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ABSTRACTThe research has been conducted at mangrove forest of Pulau Dua conservation inSerang town of Banten province from September to November 2011. Thepurposes of study were to know the production and potential nutrient of mangrovelitter and to expect the nutrients released into marine environment. The samplewas taken by employing transect-square method. Mangrove litter avalanches werecaught by litter-trap and the size was examined by filtering the litter in water flowwhich connected mangrove forest and marine. The potential nutrient production ofmangrove litter was analyzed by administering nutrient analysis of C, N, and P inlaboratory. The findings showed that the dominating mangrove types wereAvicennia marina and Rhizophora apiculata with 51.43% and 36.19%.of relativedensity. The mangrove forest of Pulau Dua conservation produced 4.05 gr/m2 /daylitters on average total or 14.78 ton/ha/year litters, and the largest contributor wasleaves. The production of litters’ potential nutrient achieved 0.3456 gr-C/m2/dayor 1.2616 ton-C/ha/year, 0.0091 gr-N/m2/day or 0.0333 ton-N/ha/year, 0.0008 gr-P/m2/day or 0.0031 ton-P/ha/year. Mangrove forest of Pulau Dua conservationalso contributed 855.4724 gr.day/m3 litters to marine waters."