Hasil Pencarian  ::  Simpan CSV :: Kembali

"Epifiton berperan penting dalam sistem produksi perairan, tetapi komposisi dan kuantitasnya belum diketahui di Situ Alam. Terdapat tumbuhan emergent di Situ Alam meliputi Oryza rufipogon dan Isachne globosa, yang dapat berperan sebagai substrat epifiton. Oleh karena itu, analisis struktur komunitas epifiton pada dua tumbuhan tersebut di Situ Alam perlu dilakukan, disertai komposisi organisme yang berpotensi menjadi epifiton. Sampel epifiton didapat dari Oryza rufipogon dan Isachne globosa menggunakan metode purposive sampling di tepi situ, sedangkan organisme yang berpotensi menjadi epifiton didapat dari gelas objek yang dibenamkan dalam situ. Hasil yang diperoleh, yaitu kelimpahan epifiton pada Oryza rufipogon sebesar 26.163 sel/cm2 dari 61 genus, sedangkan pada Isachne globosa sebesar 49.863 sel/cm2 dari 50 genus, dan disertai 37 genus organisme yang berpotensi menjadi epifiton. Berdasarkan indeks keanekaragaman Shannon-Wiener, keanekaragaman epifiton pada Oryza rufipogon dan Isachne globosa termasuk sedang, dengan nilai pada Isachne globosa yaitu 2,06, dan nilai pada Oryza rufipogon yaitu 1,86. Kelimpahan dan keanekaragaman epifiton pada dua tumbuhan tersebut berbeda nyata, berdasarkan analisis uji-t. Selain itu, berdasarkan analisis similaritas Sorensen, genus epifiton pada dua tumbuhan tersebut memiliki kesamaan sebesar 88,24, dengan perbedaan sebesar 11,76, yang disebabkan oleh 10 genus spesifik pada Oryza rufipogon dan 1 genus spesifik pada Isachne globosa.

---

Epiphyton play an important role in aquatic production systems, but their composition and quantity are not yet known in Situ Alam. There are emergent plants in Situ Alam include Oryza rufipogon and Isachne globosa, which can serve as epiphyton substrate. Therefore, an analysis of epiphyton community structure on these two plants in Situ Alam should be known, with the composition of epiphyton potential organism. Epiphyton samples were obtained from Oryza rufipogon and Isachne globosa using purposive sampling method on the edge of the situ, and epiphyton potential organisms were obtained from glass objects that were immersed in situ. The results obtained, the epiphyton abundance on Oryza rufipogon are 26,163 cells cm2 from 61 genera, and on Isachne globosa are 49.863 cells cm2 from 50 genera, with 37 genera of epiphyton potential organisms.

Based on Shannon Wiener 39 s diversity index, epiphyton diversity on Oryza rufipogon and Isachne globosa is moderate, with value at Isachne globosa is 2.06, and the value of Oryza rufipogon is 1.86. The epiphyton abundance and diversity on these two plants was significantly different, based on t test analysis. In addition, based on Sorensen 39s similarity analysis, the epiphyton genera on these two plants have 88.24 similarity, with 11.76 difference, caused there are 10 specific genera on Oryza rufipogon and 1 specific genera on Isachne globosa."

"Penelitian keanekaragaman dan kelimpahan fitoplankton di area bagan Perairan Muara Binuangeun, Banten telah dilakukan pada bulan April - Mei 2018. Sampel 3 stasiun diambil secara vertikal menggunakan plankton net berukuran 60 μm diperoleh 27 botol sampel. Hasil identifikasi dan pencacahan sampel diperoleh genus fitoplankton yang terdiri dari 12 Genus Diatom, 4 Genus Dinophyceae, dan 1 Genus Cyanophyceae. Kelimpahan fitoplankton tertinggi pada stasiun 3 dengan 692 individu sel/L dan terendah pada stasiun 1 dengan 319 individu sel/L dan tergolong dalam kategori sedang. Genus fitoplankton yang mendominansi di area bagan perairan Muara Binuangeun adalah Thalassiothrix. Genus Dinophyceae yang dominan adalah Ceratium, dan Genus Cyanophyceae yang dominan adalah Trichodesmium. Keanekaragaman fitoplankton di area bagan perairan Muara Binuangeun termasuk dalam kategori sedang. Kekayaan dan kemerataan fitoplankton di kedua wilayah perairan tergolong rendah dan cukup merata.

---

Research on the diversity and abundance of phytoplankton in the fish farm area Muara Binuangeun, Banten waters were conducted in April - May 2018. Samples of 3 stations were taken vertically using a 60 μm plankton net obtained by 27 bottles of samples. The results of identification and enumeration of samples obtained by phytoplankton genera consisting of 12 genera of Diatoms, 4 genera of Dinophyceae, and 1 genera of Cyanophyceae. The highest phytoplankton abundance was at station 3 with 692 individual cells/L and the lowest at station 1 with 319 individual cells/L and belonging to the medium category. Phytoplankton dominating the area of the Muara Binuangeun watershed is Thalassiothrix. The dominant genus of Dinophyceae is Ceratium, and the dominant genus of Cyanophyceae is Trichodesmium. The diversity of phytoplankton in the Muara Binuangeun fish farm area is included in the medium category. The richness and evenness of phytoplankton in both waters is relatively low and fairly even. "

"Substrat makrofita memengaruhi kelimpahan dan keanekaragaman struktur komunitas epifiton. Mikroalga yang berpotensi bersifat perifitik menjadi komponen penyusun struktur komunitas epifiton. Berdasarkan penelitian sebelumnya, epifiton pada Utricularia berkeanekaragaman sedang dengan Cosmarium dan diatom sebagai penyusun utama komunitas epifiton, sementara epifiton pada Hydrilla dan Chara yaitu Closterium, Cosmarium, Euastrum, Micrasterias, Pleurotaenium, dan Staurastrum. Penelitian ini bertujuan mengetahui perbedaan antara struktur komunitas epifiton pada Utricularia sp. dengan Hydrilla sp. dan mengetahui plankton yang berpotensi menjadi epifiton di Situ Alam FMIPA UI. Komponen yang dikaji yaitu kelimpahan dan keanekaragaman epifiton. Penelitian dilakukan pada bulan Maret 2018 hingga Mei 2018 menggunakan metode purposive sampling dan mengambil sampel epifiton pada Utricularia sp., Hydrilla sp., gelas objek, dan plankton pada sampel air. Pengambilan tiap sampel dilakukan 3 kali dengan pengulangan 1 kali dalam jarak waktu 2 minggu. Penelitian menunjukkan 67 genus dengan 1 genus planktonik yang hanya ditemukan di sampel gelas objek saja. Kelimpahan epifiton pada Utricularia sp. sebanyak 84.609 sel/ml, lebih tinggi dibanding epifiton pada Hydrilla sp. yaitu 74.392 sel/ml. Nilai keanekaragaman epifiton pada kedua tanaman tersebut dikategorikan keanekaragaman rendah H rsquo;< 2,302. Keanekaragaman komunitas epifiton pada Utricularia sp. berbeda dengan komunitas epifiton pada Hydrilla sp. P0,05.

---

Macrophytes as substrate affect abundance and diversity in community structure of epiphyton with periphytic microalgae become part of it. Previous research showed medium diversity of epiphyton on Utricularia mostly consists of Cosmarium and diatom, also Closterium, Cosmarium, Euastrum, Micrasterias, Pleurotaenium, and Staurastrum was found on epiphyton of Hydrilla and Chara.

The purpose of this research is to know the differences between community structure of epiphyton on Utricularia sp. and Hydrilla sp., also to know planktons that become epiphyton at Situ Alam FMIPA UI. Abundance and diversity of epiphyton community are the main discussion in this research.

Research begins on March 2018 until May 2018. Using purposive sampling method, samples were taken from Utricularia sp., Hydrilla sp., object glass, and water. Each sample was taken thrice, one repetition, once every 2 weeks.

Research shows 67 genera, including 1 planktonic genus that was found only on object glass. The abundance of epiphyton on Utricularia sp. shows 84.609 cell ml, higher than 74.392 cell ml that was found on epihyton of Hydrilla sp. Both diversity indices are categorized as low diversity."

"Salah satu jenis lebah tidak bersengat yang dapat dijumpai di kampus Universitas Indonesia adalah Tetragonula aff. minor. Penelitian mengenai lebah tersebut perlu dilakukan untuk menunjang upaya konservasi. Penelitian yang dilakukan bertujuan untuk mengetahui keanekaragaman polen yang menjadi pakan leba Tetragonula aff. minor yang dibiakkan di kampus Universitas Indonesia, Depok. Proses pengambilan sampel dilakukan pada bulan November 2019 pukul 09.30--13.30. Sampel polen dikoleksi dari korbikula lebah yang sedang melakukan perjalanan kembali ke sarang. Preparasi sediaan polen dilakukan dengan metode asetolisis. Sediaan polen kemudian diamati dan dihitung di bawah mikroskop cahaya pada perbesararan 10x10 dan 10x40. Hasil penelitian menunjukkan bahwa lebah Tetragonula aff. minor mengoleksi polen dari 10 jenis kelompok tumbuhan yaitu Asystasia gangetica (rumput israel), Caesalpinia pucherrima (kembang merak), Carica papaya (Pepaya), Cocos nucifera (kelapa), Dendrophthoe pentandra (benalu), Mimosa sp. (putri malu), Morinda citrifolia (mengkudu), Lagestroemia sp. (bungur), famili Cyperaceae, dan famili Poaceae. Nilai indeks keanekaragaman Shannon-Wiener adalah 1,431 dan nilai kemerataan 62,1%, menunjukkan keanekaragaman dan kemerataan sedang. Berdasarkan data tersebut diketahui bahwa lebah Tetragonula aff. minor memiliki spektrum diet polilekti dan menunjukkan perilaku konsisten dalam pemilihan bunga selama satu kali perjalanan pencarian makan.

---

One of stingless bee that can be found in University of Indonesia campus is Tetragonula aff. minor. Therefore, research about T. aff. minor has to be done to support conservation action. Research conducted to gather information about the diversity of pollen that collected by T. aff. minor in University of Indonesia, campus Depok area. Sample collected in November 2019 at 09:30--13:30. Pollen samples collected from the corbicula of stingless bee that traveling back to the hives. Pollen preparation has done by acetolysis method. After preparation, pollens are observed and counted under light microscope in 100x and 400x magnifications. Result shows that T. aff. minor collected pollens from 10 kind of plants; Asystasia gangetica (chinese violet), Caesalpinia pulcherrima (peacock flower), Carica papaya (papaya), Cocos nucifera (coconut), Dendrophthoe pentandra (mistletoe), Mimosa sp. (mimosa), Morinda citrifolia (noni), Lagerstroemia sp. (crape-myrtle), family of Cyperaceae, and Poaceae. Shannon-Wiener diversity index value is 1,431 and evenness value is 62,1%, classified as moderate diversity and evenness. Based on this research, it is known that T. aff. minor has polilecty diet spectrum and show individual floral constancy during a foraging trip."

"Asteraceae adalah famili tumbuhan dengan 1.900 genus dan 32.000 spesies. Asteraceae mudah tumbuh di berbagai habitat seperti tanah lapang, taman, dan sisi jalan raya. Pemetaan jenis Asteraceae di Kampus Universitas Indonesia telah dilakukan oleh Oktarina & Salamah (2017:243), dan morfologi polen beberapa Asteraceae di lingkungan kampus juga telah diteliti (Salamah dkk. 2019:154). Sementara itu, struktur komunitas beberapa Asteraceae di kampus sudah dikaji oleh Agassi (2017), tetapi viabilitas polen Asteraceae di lingkungan Kampus Universitas Indonesia belum diteliti. Studi ini bertujuan untuk mengevaluasi viabilitas polen beberapa spesies Asteraceae di Kampus Universitas Indonesia. Delapan spesies Asteraceae dari 6 tribes diamati melalui metode in vitro dengan tiga tipe medium dan pewarnaan menggunakan pewarna safranin 2%. Hasil viabilitas metode germinasi in vitro menunjukkan bahwa Synedrella nodiflora, Spaghneticola trilobata, dan Youngia japonica memiliki viabilitas polen tertinggi pada ketiga tipe medium, sementara Tridax procumbens dan Mikania micrantha memiliki viabilitas polen terendah. Selain itu, tidak terdapat perbedaan signifikan pada viabilitas polen masing-masing spesies dengan ketiga tipe medium, tetapi terdapat perbedaan signifikan pada viabilitas polen masing-masing spesies di setiap medium. Metode pewarnaan menunjukkan hasil yang berbeda dengan metode germinasi in vitro, namun sejalan dengan studi struktur komunitas Asteraceae yang telah dilakukan.

---

Asteraceae is a diverse plant family comprising 1,900 genera and 32,000 species, welladapted to various habitats, including open fields, gardens, and roadside areas. Mapping of Asteraceae species on the University of Indonesia campus has been conducted Oktarina & Salamah (2017:243). Salamah et al. (2019:154) explored the pollen morphology of several Asteraceae species within the same environment. Meanwhile, Agassi (2017) studied the community structure of various Asteraceae species on the campus. Research on the pollen viability of Asteraceae in the same setting has not been explored. This study aim to determine the pollen viability of several Asteraceae species in the University of Indonesia campus environment. The pollen viability of eight Asteraceae species from six tribes was observed using in vitro germination method with three types of medium and staining method with safranin 2%. The results of the in vitro germination method showed that Synedrella nodiflora, Spaghneticola trilobata, and Youngia japonica had the highest pollen viability on all three types of medium, while Tridax procumbens and Mikania micrantha had the lowest pollen viability. Moreover, there were no significant differences in the pollen viability of each species among the three types of medium, but there were significant differences in the pollen viability of each species within each medium. The staining method yielded different results compared to the in vitro germination method, but was consistent with the community structure study of Asteraceae."

"Telah dilakukan penelitian tentang struktur populasi kerang Pinna muricata dan korelasinya dengan kepadatan lamun di sekitarnya. Tujuan dari penelitian ini adalah untuk membandingkan dan menganalisis struktur populasi kerang Pinna muricata yang meliputi kelimpahan, persebaran, dan ukuran, serta mencari tahu ada atau tidaknya korelasi dengan jumlah lamun di sekitarnya. Penelitian dilakukan dengan menggunakan transek sepanjang 50 meter yang dibentangkan mengelilingi pulau secara tegak lurus dari pantai. Pada jalur transek tersebut diletakan kuadrat dengan luas 10×2 m2 sebanyak tiga buah dengan jarak antar kuadrat adalah 10 m. Pinna muricata yang ditemukan pada tiap kuadrat dihitung dan diletakan kuadrat kecil seluas 1×1 m2 dengan posisi sehingga Pinna muricata berada di tengah kuadrat tersebut. Tegakkan tiap jenis lamun yang ada dalam kuadrat kecil dihitung. Setelah itu, cangkang kerang diambil dari substrat dan dihitung morfometrinya menggunakan penggaris. Tiap data yang didapat ditampilkan dalam tabel, dan dibandingkan dengan data yang didapat pada penelitian sebelumnya. Data jumlah Pinna muricata, jumlah tegakkan lamun, dan panjang total cangkang diuji dalam rumus Uji Korelasi Spearman. Hasil menunjukkan bahwa jumlah kerang Pinna muricata menurun sampai 42,6%, dan panjang total cangkang dari Pinna muricata menurun 13,49% dibandingkan dengan penelitian pada tahun 2003. Hasil Uji Korelasi Spearman menunjukan adanya nilai korelasi positif antara jumlah Pinna muricata dan jumlah tegakkan lamun dengan nilai koefisien korelasi 0,86, namun, ditemukan nilai korelasi negatif antara panjang total cangkang Pinna muricata dengan jumlah tegakkan lamun dengan nilai koefisien korelasi -0,51.

---

A research about the population structure of Pinna muricata and its correlation with the number of seagrass shoots around them had been conducted. The purpose of this study was to count, compare, and analyze the population structure of Pinna muricata in the shape of their numbers, distributions, and size, then finding out whether or not those factors have any correlations with the number of seagrass’ shoots around them. Data collecting was done with a 50 meter line transect placed vertically with shoreline. On the transect track, a 10×2 m2 quadrats was placed three times, with the distance of each quadrats is 10 m. Each Pinna muricata that was found on the quadrat was counted, and then a smaller quadrat with the size of 1×1 m2 was put in a way that makes the Pinna muricata is placed on the center of the small quadrat. Every seagrass’ shoots that was found on the small quadrat was counted. Then Pinna muricata was picked from its substrate to measure its morphometrics. Every data that was found was displayed on a table to be compared with previous research. The number of Pinna muricata that was found, number of seagrass’ shoots, and the total length of Pinna muricata was analyzed using the Spearman’s Rank Correlation Coefficient formula. Results show that the number of Pinna muricata had decrease by 42,6%, and the total length of Pinna muricata had also decrease by 13,49% when compared to a previous study in 2003. The results of Spearman’s rank correlation coefficient showed a positive correlation between the number of Pinna muricata and the number of seagrass’ shoots, with the number of correlation coefficient is 0,86. The result also showed a negative correlation between the total length of Pinna muricata’s shell and the number of seagrass’ shoots, with the number of correlation coefficient is -0,51."

"Mikroplastik merupakan salah satu polutan di lingkungan berukuran mikro yang menjadi permasalahan global oleh tingginya penggunaan plastik masyarakat. Penelitian ini bertujuan untuk menganalisis kelimpahan dan kandungan jenis mikroplastik pada air laut, sedimen, serta daun lamun Enhalus acoroides di Taman Nasional Pulau Pramuka, Kepulauan Seribu. Sampel air disaring dengan plankton net sementara sedimen dikeringkan dalam oven hingga berat konstan, kemudian masing- masing dicampur dalam NaCl dan diidentifikasi mikroskop cahaya. Hasil yang didapat lamun titik timur memiliki rata-rata kelimpahan mikroplastik 33,35 partikel/cm2, titik utara 38,6 partikel/cm2, titik selatan 40,55 partikel/cm2, kemudian titik barat 42,65 partikel/cm2, dan titik baratlaut 44,7 partikel/cm2. Air titik timur 56 partikel/L, titik utara 58 partikel/mL, titik selatan 69,33 partikel/mL, titik barat 72 partikel/mL, dan titik barat laut 74,66 partikel/L. Sedimen titik timur 38,66 partikel/g, titik utara 58,66 partikel/g, titik selatan 75 partikel/g, titik barat 77 partikel/g, dan titik barat laut 89 partikel/g. Hasil uji kandungan jenis ATR-FTIR ditemukan kandungan HDPE, LDPE, dan PP. Uji Kruskal Wallis menunjukkan tidak ada perbedaan signifikan mikroplastik pada lamun Enhalus acoroides di kelima titik.

---

Microplastic is one of the micro-sized pollutants in the environment and has become a global problem due to the high use of plastic amongst society. This study is aimed to analyze the abundance and content of microplastics in sea water, sediment, and seagrass Enhalus acoroides in Pramuka Island. The leaf surface of Enhalus acoroides were softly scraped using razor blade and microplastic was identified through microscope and ATR-FTIR. The water sample was filtered with a plankton net whereas the sediment was dried in an oven until constant weight, each was mixed in NaCl and identified through light microscope. Results obtained, east site has a microplastic average abundance of 33.35 particles/cm2, north site 38.6 particles/cm2, south site 40.55 particles/cm2, west site 42.65 particles/cm2, and northwest site 44.7 particles/cm2. The east site for water sample has average abundance 56 particles/mL, north site 58 particles/mL, south site 69.33 particles/mL, west site 72 particles/mL, and northwest site 74.66 particles/L. The east site for sediment has 38.66 particles/g,north site 58.66 particles/g, south site 75 particles/g, west site 77 particles/g, and northwest site 89 particles/g. The result of ATR-FTIR showed HDPE, LDPE, and PPcontent. Kruskal Wallis Test showed no significant difference in microplastic abundance in seagrass Enhalus acoroides at the five sampling sites and Pearson Test showed positive and signficant relation between microplastics in water and sediment."

"Penelitian bertujuan untuk mengetahui pengaruh kacang ruji (Pueraria javanica) sebagai tanaman penutup (cover crop) terhadap pertumbuhan tanaman cabai merah (Capsicum annum L.). Penelitian dilakukan di kota Cirebon Jawa Barat selama kurang lebih 4 bulan mulai bulan Maret - Juli 2022. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap dengan variabel penelitian yaitu variabel bebas berupa dua perlakuan; kelompok eksperimen (A) yaitu tanaman cabai merah dengan tanaman penutup kacang ruji dan kelompok kontrol (B) yaitu tanaman cabai merah tanpa menggunakan tanaman penutup, sedangkan variabel terikat adalah pertumbuhan tanaman cabai merah. Parameter pertumbuhan yang diukur antara lain tinggi batang (TB), panjang daun (PD), panjang buah (PC) dan berat buah (BC). Data parameter pertumbuhan selanjutnya dianalisis menggunakan T-test dengan taraf signifikan 0,05. Hasil penelitian menunjukkan bahwa ada pengaruh tanaman cover crop Pureraria javanica terhadap pertumbuhan tanaman cabai merah yaitu tinggi batang, panjang buah dan berat buah, tetapi pada aspek panjang daun tidak terdapat perbedaan yang signifikan.

---

The aim of the study is to determine the effect of kudzu nut (Pueraria javanica) as a cover crop on the growth of red chili (Capsicum annum L.). The study is conducted in Cirebon city, West Java for approximately 4 months starting from March - June 2022. The experimental design used in the study is Completely Randomized Design with the division of treatment group A, namely red chili plant group with cover crops and group B with red chili plant group without the use of cover crops. The research variables are (1) the independent variable is the cover crop of ruji beans and (2) the dependent variable is the growth of the red chili plant. Growth parameters which is measured including stem height (TB), leaf length (PD), fruit length (PC) and chili weight (BC). The results of the next study is analyzed using the T-test by a significant level of 0,05. The results show that there are significant differences in stem height, length and weight of chili peppers in the presence of ruji ground cover plants. There is only a slight difference in leaf length of red chili plants between plants grown with and without the use of rhizome cover crops."

"ABSTRACTUlmus lanceifolia merupakan tumbuhan dari famili yang menjadi andalan masyarakat etnis Karo sebagai bahan bangunan rumah adat etnis Karo. Ulmus lanceifolia memiliki ciri ekologi seperti habitat khusus tumbuh dan hidup diatas batu gamping (limestone). Desa Lau Buluh merupakan salah satu desa yang memiliki sumber daya alam yaitu batu gamping yang cukup melimpah di Kabupaten Karo. Kekayaan batu gamping di Desa Lau Buluh menjadi daya tarik bagi industri semen. Hal tersebut dapat menjadi ancaman bagi tumbuhan yang berada di hutan Desa Lau Buluh khususnya U. lanceifolia. Oleh sebab itu, penelitian ini bertujuan untuk mengetahui keberadaan, jumlah dan pola persebaran dari tumbuhan U. lanceifolia serta menjadi data dasar keberadaan U. lanceifolia. Ulmus lanceifolia yang ditemukan berjumlah 97 individu dengan nilai indeks morisita 0,508, dan nilai INP tertinggi pada tingkat Semai 40% dan Pohon 36% yang membentuk pola grafik J terbalik pada hasil tiap tingkat life form. Hasil tersebut menunjukkan bahwa U. lanceifolia memiliki regenerasi yang cukup baik dan memiliki pola sebar mengelompok.

---

ABSTRACTUlmus lanceifolia is a plant from the Ulmaceae family that is a mainstay of the Karo ethnic community as a building material for Karo ethnic traditional houses. Ulmus lanceifolia has ecological features such as special habitats that grow and live on limestone. Lau Buluh village is one of the villages that has natural resources, namely limestone which is quite abundant in Karo Regency. The wealth of limestone in Lau Buluh Village is an attraction for the cement industry. This can be a threat to plants in the forests of Lau Buluh Village, especially U. lanceifolia. Therefore, this study aims to determine the existence, number and distribution patterns of U. lanceifolia plants and become the basic data for the existence of U. lanceifolia. Ulmus lanceifolia which was found was 97 individuals with a morisita index value of 0.508, and the highest INP value at Semai level was 40% and a 36% tree formed an inverted J chart pattern on the results of each level of life. These results indicate that U. lanceifolia has good regeneration and has a clustered scattered pattern."

"Penelitian struktur komunitas mangrove asosiasi di kawasan tambak silvofishery Blanakan telah dilakukan sejak Februari hingga Agustus 2019. Penelitian ini bertujuan untuk mengetahui dan membandingkan struktur komunitas mangrove asosiasi yang dekat dan jauh dari sumber polutan logam berat di kawasan tambak silvofishery Blanakan, Subang, Jawa Barat, meliputi komposisi jenis, keanekaragaman, kemerataan, dominansi, kerapatan relatif, frekuensi relatif, penutupan relatif, dan Indeks Nilai Penting (INP). Data komunitas mangrove asosiasi diambil dari 3 stasiun, yang masing-masing terdiri atas 3 tambak. Pengambilan data di setiap tambak dilakukan dengan metode belt transect berukuran 1m × 100m sejumlah 4 belt transect. Pengukuran faktor abiotik dilakukan di setiap tambak. Mangrove asosiasi diidentifikasi dan dianalisis menggunakan indeks keanekaragaman Shannon-Wiener, indeks kemerataan Pielou, indeks dominansi Simpson, Kerapatan Relatif jenis, Frekuensi Relatif jenis, Penutupan Relatif jenis, dan Indeks Nilai Penting. Hasil penelitian diperoleh 19 jenis mangrove asosiasi dari 12 suku. Komposisi jenis komunitas mangrove asosiasi di stasiun II yang berada jauh dari sumber polutan logam berat, lebih banyak dibandingkan di stasiun I dan III yang berada dekat dengan sumber polutan logam berat. Keanekaragaman jenis mangrove asosisasi tinggi sementara penyebaran jenis hampir merata di setiap stasiun. Namun, tidak terdapat jenis yang mendominasi komunitas tersebut. Komunitas mangrove asosiasi dalam keadaan stabil dan faktor abiotik masih mendukung keberadaan komunitas tersebut. Chloris barbata Sw. (vide Bor) memiliki kerapatan relatif tertinggi sebesar 41,13% pada stasiun I. Ischaemum muticum memiliki frekuensi relatif tertinggi sebesar 28,59% pada stasiun I. Pluchea indica L. memiliki INP sebesar 73,65% pada stasiun II. Sesuvium portulacastrum L. memiliki penutupan relatif tertinggi sebesar 50,12% dan INP tertinggi sebesar 99,81% pada stasiun III.

---

Community structure study of associated mangrove at Blanakan Silvofishery Pond was done from February until August 2019. The purpose of this study is to know and compare the community structure of associated mangrove near and far from the source of heavy metal pollutants in the Blanakan silvofishery pond area, Subang, West Java, including species composition, diversity, evenness, dominance, relative density, relative frequency, relative closure, and Important Value Index (IVI). Data of associated mangrove community were collected from 3 stations and each station consist of 3 ponds. The sampling community data on each pond was done using belt transect method with 1 × 100 square meter as many as 4 belt transects. Measurement of abiotic factors was done on each pond. Associated mangrove were identified and analyzed using the Shannon-Wiener diversity index, Pielou evenness index, Simpson dominance index, Species Relative Density, Species Relative Frequency, Species Relative Closure, and Important Value Index. The results showed that there were 19 species of associated mangrove from 12 families. The species composition of the associated mangrove community at station II which far from the sources of heavy metal pollutants, more than in station I and III which are close to the sources of heavy metal pollutants. Species diversity of associated mangrove is high while species distribution is almost evenly distributed at each station. However, there is no dominant species in community. The associated mangrove community was in stable condition and the abiotic factors still support the existence of the community. Chloris barbata Sw. (vide Bor) has the highest relative density, as many as 41,13% at station I. Ischaemum muticum has highest relative frequency, as many as 28,59% at station I. Pluchea indica L. has IVI as many as 73,65% at stasion II. Sesuvium portulacastrum L. has the highest relative closure as many as 50,12% and the highest IVI as many as 99,81% at station III.

"