scholarly journals Keanekaragaman Gastropoda Pada Habitat Lamun Di Perairan Desa Tayando Yamtel Kecamatan Tayando Tam Kota Tual

2020 ◽  
Vol 9 (2) ◽  
pp. 163
Author(s):  
Liyatin Gea ◽  
A. S. Khouw ◽  
Ch. I. Tupan
Keyword(s):  
Species Diversity ◽  
Food Chain ◽  
Environmental Parameters ◽  
Seagrass Habitat ◽  
Seagrass Beds ◽  
Thalassia Hemprichii ◽  
Ecological Index ◽  
Cymodocea Rotundata ◽  
Index Value ◽  
Cymodocea Serrulata

The gastropod community is an important component in the food chain in seagrass beds, where the gastropods are the detritus feeder. Research on the diversity of gastropods in seagrass habitat in the waters of Tayando Yamtel Village, Tam City, Tual District, was conducted in March-May 2018, using the quadrant linear transect method. The results of measurements of environmental parameters in Tayando Yamtel waters are: an average pH of 8.55; DO 6.59 µg / l; salinity 32.36 ‰; temperature of 29 ° C; TDS 24.7 mg / l; current velocity (0.42 m / sec) is classified as low current; and a depth of 1.5 m. Gastropod research results obtained 862 individuals consisting of 15 families and 30 species of gastropods, while for seagrass obtained 3 species namely Cymodocea rotundata, Cymodocea serrulata and Thalassia hemprichii. The highest value of composition and gastropod density at Station I was dominated by Psedeovertagus aluco species at 62.73% and 3.708 (ind / m2), while at Station II were 28.01% and 0.93 (ind / m2) and Station III were 38.46% and 0.15 (ind / m2) are dominated by Strombus gibberulus species. Based on the gastropod ecological index value, the index value of species diversity and harmony is included in the medium category and the index value of dominance is in the low category. Keywords: Gastropoda, Seagrass, Tayando Yamtel

Kestabilan Habitat Lamun Ditinjau Dari Komposisi dan Kepadatan Jenis

2012 ◽  
Vol 8 (1) ◽  
Author(s):  
Paskalina Th. Lefaan
Keyword(s):  
Line Transect ◽  
Seagrass Habitat ◽  
Pioneer Species ◽  
Thalassia Hemprichii ◽  
Climax Species ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Cymodocea Serrulata ◽  
Stable Habitat

<em>Seagrasses habitats have both physical and ecological functions that support adjacent waters qualities and its dwelling organisms. There are varies of pressure on seagrass environmental, especially due to people activities that could decrease its function and habitat stabilities. The study aimed to determine about seagrass habitat stabilities from its species composition and/or densities. Line transect-plots and exploration methods were used in five locations of Manokwari coastal waters, that were, Andai, Rendani, Wosi, Briosi, and Tanjung Manggewa. There are five pioneer species (Cymodocea rotundata, Halodule pinifolia, H. uninervis, Syringodium isoetifolium, Halophila ovalis) and 3 climax species (Cymodocea serrulata, Enhalus acoroides, Thalassia hemprichii). The pioneer only found in Andai and Wosi, however both pioneer and climax encountered in three other locations. In Rendani and Tanjung Manggewa higher density of climax species (T. hemprichii) were 617.7 and 828.0 stands m-2, respectively, although in Briosi the higher pioneer (C. rotundata) of 570.7 stands m-2. These conditions showed that seagrass habitat in Rendani and Tanjung Manggewa are more stable compared to Briosi, as well as Andai and Wosi. It concluded that pioneer species found in newly formed habitat or disturbed, on the other hand, climax in more stable habitat.</em>

scholarly journals Determining seagrassess community structure using the Braun – Blanquet technique in the intertidal zones of Islas de Gigantes, Philippines

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Quin Yudelmo Clarito ◽  
Nora O. Suerte ◽  
Elena C. Bontia ◽  
Ivy Maestrecampo Clarito
Keyword(s):  
Species Diversity ◽  
Diversity Index ◽  
Environmental Parameters ◽  
Mean Value ◽  
Canopy Height ◽  
Thalassia Hemprichii ◽  
Percentage Cover ◽  
Seagrass Ecosystems ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

The seagrass ecosystem which is considered the most productive ecosystem occurs in tropical and subtropical shallow marine waters where it supports diverse flora and fauna. Seagrasses of Islas de Gigantes, Carles, Iloilo were assessed to  determine species diversity, abundance, canopy height and percentage cover. Braun – Blanquet technique was used where 3 transects were laid in each station in three barangays of Islas de Gigantes, namely: Barangay Asluman, Barangay Granada and Barangay Gabi. A total of 7 species were found, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halodule pinifolia, Halodule uninervis, Enhalus acoroides and Syringodium isoetifolium. Using the Shannon Diversity Index, the seagrass bed in Gabi was the most diverse with a value of 2.8. Sorenson's coefficient (CC) was used to compute the species similarity attributes indicating that the three communities have many similarities to each other in terms of species diversity and environmental parameters that affect seagrass ecosystems. Syringodium isoetifolium had recorded the highest number of shoots (475 shoots/m2) in Granada. The percentage cover of seagrasses varied across the sampling sites ranging from 55% - 67.50%, with a mean value of 62.50%. However, E. acoroides had the tallest canopy height recorded that  ranged from 12.33 – 24.83 cm.

scholarly journals KEANEKARAGAMAN SPESIES LAMUN DI KABUPATEN BANGKA SELATAN PROVINSI KEPULAUAN BANGKA BELITUNG

2018 ◽  
Vol 14 (1) ◽  
pp. 21
Author(s):  
Dwi Rosalina ◽  
Endang Yuli Herawati ◽  
Yenny Risjani ◽  
Muhammad Musa
Keyword(s):  
Seagrass Beds ◽  
Seagrass Species ◽  
Chemical Parameters ◽  
Thalassia Hemprichii ◽  
Coverage Area ◽  
Seagrass Ecosystem ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Cymodocea Serrulata

Marine area which is planted by seagrass called as seagrass beds. Seagrass is one of the typical ecosystems in marine waters. Bangka Belitung Province is one of the areas in Indonesia that has seagrass ecosystem. This study aims to determine the diversity, density, and coverage area of seagrass beds in the waters of South Bangka Regency. The research was conducted in Tukak, Tanjung Kerasak, and Tanjung Kemirai. The data is collected using quadratic transect method and also data of physics-chemical parameters such as temperature, salinity, pH, depth, velocity and water substrate. The results of the research showed that 7 species of seagrasses in South Bangka Regency are Cymodocea serrulata, Cymodocea rotundata, Halodule uninervis, Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium and Halophila minor. Seagrass in Lempeng waters which has the highest density is Cymodocea serrulata, about 58 ind/m2. The highest frequency of seagrass species in Tukak is Thalassia hemprichii about 1%. Seagrass species of Cymodocea serrulata has the highest cover percentage in Lempeng waters about 29.56%.

scholarly journals Pemetaan Kondisi Lamun di Perairan Sekitar Pulau Lepar Kabupaten Bangka Selatan

2019 ◽  
Vol 2 (2) ◽  
pp. 83-86
Author(s):  
Suci Puspita Sari
Keyword(s):  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Cymodocea Serrulata

Status mengenai kondisi ekosistem lamun di perairan Bangka Selatan diperlukan untuk menentukan terjadinya indikasi kerusakan lamun sebagai akibat dari aktifitas penambangan timah di wilayah pesisir. Kondisi kesehatan lamun dianalisis melalui kerapatan dan tutupan lamun sehingga dapat diketahui kondisinya.  Metode yang digunakan untuk memantau kondisi lamun pada penelitian ini adalah pemanfaatan teknologi Penginderaan Jauh dan Sistem Informasi Geografis (SIG), menggunakan algoritma Depth Invariant Index (DII). Distribusi lamun berdasarkan hasil pengolahan data citra Landsat tahun 2017 menunjukkan bahwa padang lamun di perairan Bangka Selatan seluas 4066,7 Ha. Spesies yang ditemukan dari 7 titik sampling, yaitu Enhalus acoroides, Thalassia hemprichii, Halophila ovalis, Cymodocea serrulata, Halodule uninervis, dan Cymodocea rotundata. Kondisi padang lamunnya secara umum termasuk dalam kategori “Miskin”.  

scholarly journals Cadangan Karbon pada Ekosistem Padang Lamun di Siantan Tengah Taman Wisata Perairan Kepulauan Anambas

2020 ◽  
Vol 24 (1) ◽  
pp. 45-54
Author(s):  
Muhammad Al Rizky Ratno Budiarto ◽  
Johan Iskandar ◽  
Tri Dewi Kusumaningrum Pribadi
Keyword(s):  
Carbon Stock ◽  
Carbon Sink ◽  
Gravimetric Method ◽  
Total Carbon ◽  
Seagrass Beds ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Value Range ◽  
Seagrass Biomass ◽  
Cymodocea Rotundata

Secara global, ekosistem lamun dianggap sebagai penyerap karbon sehingga dapat berkontribusi terhadap mitigasi perubahan iklim. Penelitian bertujuan untuk mengetahui komposisi jenis, biomassa dan cadangan karbon pada komunitas padang lamun di perairan Siantan Tengah Taman Wisata Perairan (TWP) Kepulauan Anambas. Penelitian dilaksanakan pada bulan Agustus 2019 s.d Januari 2020. Uji kandungan karbon dilakukan dengan metode Welkley and Black sedangkan untuk mendapatkan biomassa menggunakan metode gravimetrik. Hasil penelitian menunjukkan bahwa terdapat tiga jenis lamun, yaitu Enhalus acoroides, Thalassia hemprichii, dan Cymodocea rotundata. Nilai biomassa lamun berkisar antara 171,89 – 275,68 gbk/m2 dan nilai cadangan karbon berada pada kisaran 51,89 – 80,66 gC/m2. Padang lamun di Siantan Tengah memiliki luas 130,45 ha, sehingga total Cadangan karbon pada ekosistem padang lamun di perairan Siantan Tengah diperkirakan 95,88 ton C. Penelitian ini membuktikan adanya kandungan karbon pada biomassa lamun sehingga dapat disimpulkan bahwa padang lamun berperan sebagai penyerap karbon (carbon sink).  Globally, seagrass ecosystems are considered as carbon sink so that it can contribute to climate change mitigation. This research aims to determine the species composition, biomass, and carbon stock in seagrass communities in Siantan Tengah Marine Tourism Park of Anambas Islands. The research was conducted in Agustus 2019 – January 2020.  The carbon content test was carried out by the Walkley and Black method while to obtain biomass using the gravimetric method. The result od study showed that there are three species of seagrasses, namely Enhalus acoroides, Thalassia hemprichii, and Cymodocea rotundata. Seagrass biomass value range 171,89 – 275,68 gbk/m2 and seagrass carbon stock value range 51,89 – 80,66 gC/m2. The area of seagrass beds in Central Siantan is 130,45 ha so that the total carbon stock estimated reach 95,88 tons C. This research proves the presence of carbon in the biomass of seagrass beds, so it can be concluded that seagrass beds act as carbon sinks.

scholarly journals Kondisi dan Keanekaragaman Jenis Lamun di Perairan Pulau Serangan, Provinsi Bali

2018 ◽  
Vol 5 (1) ◽  
pp. 131
Author(s):  
Luh Gede Manik Radzena Martha ◽  
Pande Gde Sasmita Julyantoro ◽  
Alfi Hermawati Waskita Sari
Keyword(s):  
Water Quality ◽  
Diversity Index ◽  
Good Condition ◽  
Quality Parameters ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Index Value ◽  
Seagrass Coverage

Serangan Island is one of the tourism destinations in Bali which is administratively belong to the municipality of Denpasar. Tourism development near with the segrass habitat cause the segrass ecosystem being degraded in the waters of Serangan Island. This study was aimed to determine the diversity and conditions of seagrass species which were observed from the density and percentage of seagrass coverage and to examine the effect of water quality on the percentage of seagrass coverage. This research was conducted from February to March 2017 on Serangan Island using quantitative descriptive method. Sampling was conducted at three stations by taking data and samples of seagrass, measuring water quality (temperature, salinity, pH, turbidity, substrate observation) and analyze of nitrates and phosphates content. Seven types of seagrass species were found i.e. Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, Halodule pinifolia, Syringodium isoetifolium, and Thalassodendron ciliatum. The study showed that the diversity index value was in the medium category. The density of seagrass was classified as very tight (condition scale of 5). The highest density was found on Cymodocea rotundata spesies at station I about 777 ind/m2. The highest percentage of seagrass coverage (79,55%) was found in station I which classified as good condition, while station II and station III were classified as damaged condition with value 13.65% and 20,79% respectively. Finally, the water quality parameters have relatively low effect to seagrass coverage percentage.

scholarly journals The Inventory of Seagrasses in Marine Field Station of Faculty of Fisheries and Marine Science in Subdistrict of East Likupang District North Minahasa

2018 ◽  
Vol 6 (2) ◽  
pp. 38
Author(s):  
Stevani Rawung ◽  
Ferdinand F Tilaar ◽  
Ari B Rondonuwu
Keyword(s):  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Field Station ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Random Survey ◽  
Cymodocea Serrulata

This study was conducted in Marine Field Station of Faculty of Fisheries and Science of Sam Ratulangi University, Sub-district of East Likupang, North Minahasa. This study aims to identified the seagrasses in the water of Marine Field Station. The benefits of this study are for the database of seagrasses ecosystem management and comparative for other studies. The Observation and data collection was using random survey technic by analyzed the areas to collecting all the seagrass species found. Furthermore, the seagrass samples were categorised into each species. The result showed the amount of seagrass species in Marine Field Station are 8 species from 6 genera and 2 families: Cymodocea rotundata, Cymodocea serrulata, Halodule uninervis, Syringodium isoetifolium, Thalassia hemprichii, Enhalus acoroides,  Halophila ovalis, dan Halophila minor.Keyword: Inventory, Seagrass, Marine Field Station ABSTRAKPenelitian dilakukan di perairan Marine Field Station Fakultas Perikanan dan Ilmu Kelautan Unsrat Kecamatan Likupang Timur Kabupatan Minahasa  Utara. Tujuan penelitian  untuk mengidentifikasi lamun yang ada di Perairan Marine Field station. Manfaat penelitian dapat menjadi data pengelolaan ekosistem padang lamun dan dapat menjadi perbandingan untuk penelitian-penelitian selanjutnya. Pengamatan dan pengambilan sampel menggunakan teknik survei jelajah, yaitu dengan menjelajahi wilayah pengamatan sambil mencari semua spesies lamun. Lamun yang diambil adalah semua jenis yang ditemui. Selanjutnya, sampel lamun dikelompokan berdasarkan spesies. Hasil pengamatan menunjukkan jumlah spesies lamun pada lokasi penelitian di Perairan Marine Field Station adalah 8 spesies dari 6 genera dan 2 famili yaitu, Cymodocea rotundata, Cymodocea serrulata, Halodule uninervis, Syringodium isoetifolium, Thalassia hemprichii, Enhalus acoroides,  Halophila ovalis, dan Halophila minor. Kata kunci: Inventarisasi, Lamun, Marine Field Station

scholarly journals KAJIAN KOMUNITAS EKOSISTEM LAMUN DI SEMENANJUNG TARABITAN KECAMATAN LIKUPANG BARAT KABUPATEN MINAHASA UTARA

2021 ◽  
Vol 9 (2) ◽  
pp. 24
Author(s):  
Risandi D Sitaba ◽  
Carolus P Paruntu ◽  
Billy Theodorus Wagey
Keyword(s):  
Species Composition ◽  
Percent Cover ◽  
Seagrass Beds ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Halodule Uninervis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

This research was conducted in the waters of Tarabitan Peninsula, West Likupang North Minahasa using quadants transect method. The purpose of this study was to determine the community structure of seagrass found in that waters as initial information for sustainable management seagrass ecosystem . Field observation was conducted to identify the seagrass species, number of individuals/shoots, percent cover for each type of seagrass in those plotting quadrants. The result of this study documented 6 types of seagrass namely, Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis and Halodule uninervis. The species composition and distribution of seagrass were varied and was dominated by Thalassia hemprichii was the most dominant seagrass species with a relative density of 55.55%, a relative frequency of 33.67%, 39.92% relative cover, an important value index of 129.03%, a diversity index of 1.30 belonging to this condition, moderate, the uniformity index of 0.72 is classified as high and the dominance index of 0.2 is classified as low. Based on Minister of Environment Decree Republic Indonesia No. 200 of 2004 concerning the status of seagrass beds, the condition of the seagrass beds in the waters of Tarabitan Village is classified as rich / healthy with a cover value of ≥ 60. Keywords : Seagrass Community, Species Composition,  distribution, Tarabitan Peninsula           Penelitian ini dilakukan di perairan Semenanjung Tarabitan Likupang Barat Minahasa Utara dengan menggunakan metode transek kuadran. Tujuan penelitian ini adalah untuk mengetahui struktur komunitas lamun yang terdapat di perairan tersebut sebagai informasi awal untuk pengelolaan lamun secara berkelanjutan. Pengamatan lapangan dilakukan untuk mengidentifikasi jenis lamun, jumlah individu/tegakan, persentase tutupan tiap jenis lamun pada tiap kuadran. Hasil penelitian ini mendokumentasikan 6 jenis lamun yaitu Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Syringodium isoetifolium, Halophila ovalis dan Halodule uninervis. Komposisi jenis dan sebaran lamun bervariasi dan didominasi oleh jenis lamun Thalassia hemprichii merupakan jenis lamun yang paling dominan dengan kerapatan relatif 55,55%, frekuensi relatif 33,67%, tutupan relatif 39,92%, indeks nilai penting 129,03%, indeks keanekaragaman 1,30 tergolong dalam kondisi sedang, indeks keseragaman 0,72 tergolong tinggi dan indeks dominansi 0,2 tergolong rendah. Berdasarkan Keputusan Menteri Lingkungan Hidup Nomor 200 Tahun 2004, kondisi padang lamun di perairan Desa Tarabitan tergolong kaya / sehat dengan nilai tutupan ≥ 60.Kata Kunci: Komunitas Lamun, Komposisi Jenis, Distribusi, Semenanjung Tarabitan

Species diversity and distribution of seagrasses from the South Andaman, Andaman and Nicobar Islands, India

2018 ◽  
Vol 61 (3) ◽  
pp. 225-234 ◽  
Author(s):  
M. Savurirajan ◽  
Jawed Equbal ◽  
Raj Kiran Lakra ◽  
Kunal Satyam ◽  
Ganesh Thiruchitrambalam
Keyword(s):  
Species Diversity ◽  
Fine Sand ◽  
Shoot Density ◽  
The South ◽  
Anthropogenic Pressures ◽  
Thalassia Hemprichii ◽  
Coral Rubble ◽  
Coral Sand ◽  
South Andaman ◽  
Cymodocea Rotundata

AbstractA survey was conducted with the objective to study seagrass distribution, bed size and shoot density in different substrata of the South Andaman Islands. A total of 231 seagrass sites were observed during the study, in which a total of eight species were found. The South Andaman region exhibited the highest species diversity followed by Havelock, Little Andaman and Neil Islands. Eleven continuous seagrass bed were noted during the study which were confined to three different types of substrata: sand only; sand mixed with coral sand and coral rubble; sand mixed with mud.Thalassia hemprichiiandCymodocea rotundatawere found in dense canopies and covered large areas associated with sand and coral rubble.Halophila beccariishowed moderate abundance in muddy substrata andHalodulespp. grew in fine sand. The highest shoot density was recorded at Haddo, followed by Vijaya Nagar and Chidyatapu, contributed mostly byHalodulespp. In general, seagrass diversity and distribution were mainly influenced by the percentage composition of sand. The authors recommend that the seagrass meadow of Haddo should be considered for conservation priority because of multiple anthropogenic pressures, such as sewage input, dumping of solid wastes on the shoreline and anchoring of boats.

scholarly journals Kandungan Nitrat dan Fosfat dalam Air Pori Sedimen dan Kolom Air di Daerah Padang Lamun Perairan Pantai Prawean, Bandengan, Jepara

2020 ◽  
Vol 9 (4) ◽  
pp. 464-473
Author(s):  
Eko Wardana Parsaulian Tampubolon ◽  
Ria Azizah Tri Nuraini ◽  
Endang Supriyantini
Keyword(s):  
Water Column ◽  
Pore Water ◽  
Descriptive Analysis ◽  
Nitrate Content ◽  
Seagrass Beds ◽  
Thalassia Hemprichii ◽  
Sediment Pore Water ◽  
Decomposition Of Organic Matter ◽  
Cymodocea Rotundata ◽  
Seagrass Density

ABSTRAK : Secara alamiah konsentrasi zat hara dalam perairan bervariasi untuk masing-masing bentuk senyawanya, termasuk nitrat dan fosfat. Lamun berperan penting terhadap sumbangan nutrien di perairan dengan hasil dekomposisi serasah lamun oleh mikroorganisme pengurai. Fungsi sistem lamun terletak pada pemahaman faktor-faktor yang mengatur produksi dan dekomposisi bahan organik serta efisiensi daur nutrisi dalam sistemnya. Penelitian ini bertujuan untuk mengetahui kandungan nitrat dan fosfat air pori sedimen dan kolom air serta mengetahui jenis dan jumlah kerapatan lamun yang terdapat di perairan Pantai Prawean Bandengan Jepara. Metode penelitian ini menggunakan analisis deskriptif. Analisa kandungan nitrat menggunakan metode analisis SNI 06-6989.31-2005 dan fosfat menggunakan metode analisis BP2-MU-A-08. Pengamatan lamun menggunakan transek kuadrat 50x50cm menurut panduan LIPI. Kandungan nitrat air pori sedimen berkisar 1,85 – 2,82 mg/l, tergolong sedang. Sedangkan kandungan nitrat kolom air berkisar 0,63 – 1,09 mg/l, tergolong rendah. Kandungan fosfat pada air pori berkisar 0,09 – 0,15 mg/l, tergolong sangat subur. Sedangkan kandungan fosfat kolom air berkisar 0,02 – 0,04 mg/l, tergolong cukup subur. Jenis lamun yang ditemukan pada lokasi penelitian sebanyak 4 spesies yaitu Enhalus accoroides, Thalassia hemprichii, Cymodocea serullata, dan Cymodocea rotundata. Kerapatan lamun tertinggi di stasiun 2 sebanyak 132 tegakan/m2 (rapat) sedangkan stasiun 1 sebanyak 95 tegakan/m2 (agak rapat) dan stasiun 3 sebanyak 123 tegakan/m2 (agak rapat). Lamun jenis Cymodocea serullata memiliki dominansi tertinggi pada setiap stasiun. ABSTRACT : Naturally the concentration of nutrients in the waters varies for eachthe form of its compounds, including nitrates and phosphates. Seagrass plays an important role in the contribution of nutrients in waters with the result of decomposition of  seagrass litter by decomposing microorganisms. The function of the seagrass system lies in understanding the factors that govern the production and decomposition of organic matter and the efficiency of nutrient cycling in the system. This research aims to determine the content of nitrate and phosphate in sediment pore water and water columns in the seagrass beds of Prawean Coast waters Jepara and determine the type and the amount of seagrass density. This research method uses descriptive analysis. Nitrate content analysis using SNI 06-6989.31-2005 and phosphate analysis using BP2-MU-A-08. Seagrass observations using the Transect squared 50x50cm according to the LIPI guidelines. The content of nitrates sediment pore water in the seagrass beds of Prawean Coast ranges from 1,85 to 2,82 mg/l, while the content of nitrate in water column ranges from 0,63 – 1,09 mg/l. The content of phosphate in pore water ranges from 0,09 – 0,15 mg/l, while the phosphate content of the water column ranges from 0,02 to 0,04 mg/l. Four types of seagrass found were Enhalus accoroides, Thalassia hemprichii, Cymodocea serullata, and Cymodocea rotundata. The highest seagrass density at station 2 was 132 stands/m2, while the station 1 was 95 stands/m2 and station 3 was 123 stands/m2. Seagrass type Cymodocea Serullata has the highest dominance at each station.Kata Kunci :   Nitrat, Fosfat, Air Pori Sedimen, Kolom Air, Lamun.

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