scholarly journals Structure Community of Seagrass (Lamun) In The Village Beach Of Mokupa Tombariri Subdistrict, Minahasa District North Sulawesi.

2015 ◽  
Vol 3 (1) ◽  
pp. 16
Author(s):  
Feybe H. A Zachawerus ◽  
Alex D. Kambey ◽  
Rose O. S. E. Mantiri
Keyword(s):  
Relative Density ◽  
Diversity Index ◽  
Thalassia Hemprichii ◽  
Dominance Index ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
North Sulawesi ◽  
Cymodocea Rotundata ◽  
Abundance And Diversity ◽  
The Village

Seagrass community of Mokupa Beach waters, Tombariri sub-district, Minahasa Regency North Sulawesi was selected as study site to get information regarding the distribution, abundance, and diversity of species. Five species were identified in this study are as follow: Cymodocea rotundata, Thalassia hemprichii, Halopila ovalis, Halodule pinifolia, and Enhalus acoroides. T. hemprichii had the highest density among those 5 species with 80.266 individuals/m2, relative density 45.709 % and score of dominance index (C) 0.3269. Among three transects deployed in the study site, transect III has the highest diversity index representing by ‘H = 1.3072. The result showed that seagrass community could grow well in the area which is also shown through similar score of evenness index.Keywords: Seagrass, diversity, dominance A B S T R A K Komunitas Lamun di Perairan Desa Mokupa Kecamatan Tombariri, Kabupaten Minahasa Sulawesi Utara sebagai lokasi penelitian untuk mendapatkan informasi tentang distribusi, kelimpahan dan keanekaragaman spesies. Diperoleh 5 spesies yaitu : Cymodocea rotundata, Thalassia hemprichii, Halopila ovalis, Halodule pinifolia, Enhalus acoroides. Kepadatan spesies yang tertinggi adalah Thalassia hemprichii 80,266 ind/m2. Kepadatan relatif (%) yang tertinggi adalah Thalassia hemprichii 45,709 %. Nilai indeks dominasi (C) (0,3269). Nilai keanekaragaman tertinggi dari ketiga transek terdapat pada transek III dengan nilai (Hʹ) 1,3072. menunjukan bahwa komunitas ini masih dapat tumbuh dengan baik di daerah tersebut. Hal ini juga ditunjang dengan nilai kemerataan yang hampir sama di ketiga transek penelitian.                                                                               Kata Kunci : Lamun, keanekaragaman, dominasi1Mahasiswa Program Studi MSP FPIK-UNSRAT2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Community Structure of Seagrass in Coastal Waters of Bahoi Village, West Likupang Sub-district, North Minahasa Regency, North Sulawesi Province

2016 ◽  
Vol 3 (2) ◽  
pp. 63
Author(s):  
Kurnia Tolule ◽  
Alex D. Kambey ◽  
Ari B. Rondonuwu
Keyword(s):  
Structure Analysis ◽  
Coastal Waters ◽  
Diversity Index ◽  
Line Transect ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
North Sulawesi ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

This study was aimed at revealing the structure of seagrass community in the coastal waters of Bahoi Village, West Likupang Sub-district, District of North Minahasa, North Sulawesi Province. Samples collection was conducted during the lowest tide period by deploying line transect and quadrate. Eight species of seagrasses were identified on this study, including species as follow: Enhalus acoroides, Thalassia hempricihii, Cymodocea rotundata, C. serrulata, Syringodium isoetifolium, Hlodule pinifolia, H. uninervis and Halophila ovalis. The highest density value ( 112.16 individual/m2) was calculated from transect III data on S. isoetifolium species. In term of relative density value, S. isoetifolium also has the highest value (35.176 %). Index dominance (C) was calculated as well from transect III data (0.477) while the highest diversity index  (H’) was calculated from transect I data (1.724). Keyword : structure, Analysis, seagrass ABSTRAK Penelitian ini bertujuan mengkaji struktur komunitas lamun di perairan pantai Desa Bahoi Kecamatan Likupang Barat Sulawesi Utara.Pengambilan sampel  dilaksanakan sekali pada saat surut terendah, data dikumpulkan berdasarkan garis transek dan kuadrat. Jenis lamun yang ditemukan dalam keseluruhan kuadrat di lokasi penelitian berjumlah 8 spesies yaitu : Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Syringodium isoetifolium, Halodule pinifolia, Halodule uninervis, dan Halophila ovalis. Kepadatan individu tertinggi terdapat pada transek III yaitu spesies Syringodium isoetifolium 112,16 ind/m2. Kepadatan relatif tertinggi terdapat pada spesies Syringodium isoetifolium (35,176 %). Indeks dominasi (C) yang tertinggi terdapat pada transek III 0.477 indeks keanekaragaman spesies (H’) yang tertinggi pada transek I 1.724. Keyword : structure, Analysis, seagrass 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Community Structure of Seagrass Meadows In Mantehage Island Waters, North Sulawesi

2014 ◽  
Vol 1 (4) ◽  
pp. 177
Author(s):  
Simon I Patty ◽  
Husen Rifai
Keyword(s):  
Diversity Index ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Seagrass Meadows ◽  
North Sulawesi ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Species Composition And Distribution ◽  
Thalassodendron Ciliatum

Research on the structure of seagrass communities in the waters of the island Mantehage was conducted in September 2010. The purpose of this study is to collect data and information on the structure of seagrass communities. Observations includes the identification seagrass species, measuring the number of individual/stand, cover percentage of each type/species on the transect. 6 types of seagrass found, i.e. Enhalus acoroides, Halophila ovalis, Thalassia hemprichii, Thalassodendron ciliatum, Cymodocea rotundata and Syringodium isoetifolium. Seagrass species composition and distribution varies at each location and is dominated by the presence of Thalassia hemprichii (48.14%) with coverage percentage ranges between 15.91% to 35.11%. Diversity index values ranged from 0.79 to 1.69 ; evenness index between 0.57 to 0.94 and the index of dominance between 0.20 to 0.56. In conclusion, the condition of seagrass meadows in Mantehage island is relatively good and can support marine life adequately.Keywords : Structure communities, seagrass, Mantehage Island

scholarly journals KOMUNITAS LAMUN DI PERAIRAN PANTAI DESA ORI, MALUKU TENGAH

2021 ◽  
Vol 17 (2) ◽  
pp. 97-103
Author(s):  
Sarah Haumahu ◽  
Frijona F Lokollo ◽  
Reni Ambon
Keyword(s):  
Coastal Waters ◽  
Line Transect ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
Halophila Ovalis ◽  
The World ◽  
Cymodocea Rotundata ◽  
Frequency Of Occurence

Seagrass communities play an important role in marine environments and estuary area, supporting communities of fish, snails and shellfish and other invertebrates. The diversity of seagrass species in the world is very low (<60 species). The coastal waters of Ori Village have a seagrass community that has never been studied. The purpose of this study was to estimate the structure of the seagrass community in the coastal waters of Ori Village, Central Maluku which includes the composition of type, density, frequency of occurence and percent of coverage. Seagrass sampling uses the line transect method. Five species of seagrass were found during the study grouped into two families: Cymodoceaceae and Hydrocharitaceae. The seagrass species found were Cymodocea rotundata, Halodule pinifolia, Enhalus acoroides Halophila ovalis and Thalassia hemprichii. T. hemprichii and E. acoroides have the highest densities (157 shoots/m2 and 137 shoots/m2, respectively). E. acoroides and T. hemprichii also have the highest frequency of occurence and relative coverage percent compared to other seagrass species found in the waters of Ori Village. Seagrass community in the waters of Ori Village is classified in a tight condition until dense.   ABSTRAK Komunitas lamun memegang peranan penting di lingkungan laut dan daerah estuari, menyokong komunitas ikan, siput dan kerang-kerangan serta invertebrata lainnya. Keragaman spesies lamun di dunia sangat rendah (<60 spesies). Perairan pantai Desa Ori memiliki komunitas lamun yang belum pernah diteliti. Tujuan dari penelitian ini adalah untuk mengestimasi struktur komunitas lamun di perairan pantai Desa Ori, Maluku Tengah yang meliputi komposisi jenis, kerapatan, frekuensi kehadiran dan persen penutupan. Pengambilan sampel lamun menggunakan metode transek garis. Lima spesies lamun ditemukan selama penelitian yang dikelompokan dalam dua famili yaitu famili Cymodoceaceae dan Hydrocharitaceae. Spesies-spesies lamun yang ditemukan adalah Cymodocea rotundata, Halodule pinifolia, Enhalus acoroides Halophila ovalis danThalassia hemprichii. T. hemprichii dan E. acoroides memiliki kerapatan tertinggi (masing-masing 157 tegakan/m2 dan 137 tegakan/m2). E. acoroides dan T. hemprichii juga memiliki frekuensi kehadiran serta persen penutupan relatif tertinggi dibanding spesies-spesies lamun lainnya yang ditemukan di perairan Desa Ori. Komunitas lamun di perairan Desa Ori tergolong dalam kondisi rapat sampai padat.   Kata Kunci: Lamun, komunitas, kerapatan, penutupan, Maluku Tengah      

scholarly journals Keragaman Lamun (Seagrass) di Pesisir Desa Lihunu Pulau Bangka Kecamatan Likupang Kabupaten Minahasa Utara, Sulawesi Utara

Jurnal MIPA ◽  
2015 ◽  
Vol 4 (2) ◽  
pp. 20
Author(s):  
Zakiah Susanti Kamarrudin ◽  
Sendy B. Rondonuwu ◽  
Pience Veralyn Maabuat
Keyword(s):  
Random Sampling ◽  
Diversity Index ◽  
Wide Distribution ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Transect Line ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Cymodocea Serrulata

Lamun adalah tumbuhan berbunga yang dapat tumbuh dengan baik pada lingkungan laut dangkal. Penelitian ini dilaksanakan di Pesisir Desa Lihunu dengan menggunakan metode purposive random sampling yang dilaksanakan pada bulan Agustus 2015 saat surut terendah. Analisis data meliputi perhitungan dengan menggunakan rumus menurut Shannon & Wienner dan buku identifikasi lamun. Berdasarkan hasil penelitian terdapat tujuh jenis lamun yang ditemukan yaitu, Enhalus acoroides (L.f.) Royle, Thalassia hemprichii (Ehrenberg) Ascherson, Cymodocea rotundata (Ehrenberg) Ascherson, Cymodocea serrulata (R. Brown) Ascherson, Halophila ovalis (R. Brwon) Hooker, Halodule pinifolia (Miki) den Hartog dan Syringodium isoetifolium (Ascherson) Dandy. Lamun Enhalus acoroides dan Thalassia hemprichii memiliki penyebaran terluas, karena ditemukan di seluruh transek pada lokasi penelitian. Jenis yang jarang dijumpai adalah Halophila ovalis dan Cymodocea serrulata. Jumlah individu lamun yang ditemukan adalah 2316 individu. Nilai indeks keanekaragaman di Pesisir Desa Lihunu memperlihatkan bahwa di wilayah ini keanekaragaman jenis lamun sedang dengan H’ = 1 ≤ H’ ≤ 3.Seagrass is flowering plants that can grow so well in shallow marine environments. This research was conducted in Seashore Lihunu Village on August 2015 using field observation with purposive random sampling when low withdraw. Data analysis was performed using the formula of Shannon-Wienner and identification of seagrass. Results obtained in this research showed that there are seven types of seagrass, namely Enhalus acoroides (L.f) Royle, Thalassia hemprichii (Ehrenberg) Ascherson, Cymodocea rotundata (Ehrenberg) Ascherson, Cymodocea serrulata (R. Brown) Ascherson, Halophila ovalis (R. Brwon) Hooker, Halodule pinifolia (Miki) den Hartog and Syringodium isoetifolium (Ascherson) Dandy. Enhalus acoroides and Thalassia hemprichii have wide distribution because they can be found in all transect line at research site. Species that are rarely found are Halophila ovalis and Cymodocea serrulata. Number of individual found was 2316 individuals. Value of diversity index at Seashore Lihunu Village showed that this area has moderate seagrass diversity with H’ = 1 ≤ H’ ≤ 3.

scholarly journals Kajian Kondisi Lamun Pada Perairan Pantai Waemulang Kabupaten Buru Selatan

2020 ◽  
Vol 9 (1) ◽  
pp. 11
Author(s):  
Efraim Samson Samson ◽  
Daniati Kasale ◽  
Deli Wakano
Keyword(s):  
Coastal Waters ◽  
Vegetation Structure ◽  
Diversity Index ◽  
Environmental Parameters ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
A Value ◽  
Cymodocea Rotundata

Research of seagrass vegetation structure has been carried out in Waemulang Coastal Waters, South of Buru Regency. This explorative study uses a linear quadrate transect method with 13 transect lines that are mounted perpendicular to the coastline, starting from the highest tide to the lowest tide. The results showed mixed vegetation types with species composition consisting of 5 seagrass species, namely: Enhalus ocoroides, Halophila ovalis, Thalassia hemprichii, Cymodocea serrulata and Cymodocea rotundata, which are members of 2 orders, 2 families, and 4 genera of seagrasses. The species that are most commonly found and have a value of density, relative density, frequency type, relative frequency, percentage of cover, relative closure, and index of important value which is higher, namely Enhalus acoroides, while the lowest, namely Halophila ovalis. In addition, the diversity index of seagrass species is 1,493, or belongs to medium category and the dominance index of seagrass species is 0.239, or there is no dominance of species. It can be concluded that the seagrass vegetation structure in Waemulang Coastal Waters is still relatively stable and Enhalus acoroides is the most influential seagrass species in the growing community. Environmental parameters are very supportive for seagrass growth in this area.

scholarly journals Keanekaragaman Lamun di Pesisir Pantai Molas, Kecamatan Bunaken Kota Manado (Biodiversity of Seagrass on Molas Seashore in Bunaken Subdistrict, Manado)

2012 ◽  
Vol 2 (1) ◽  
Author(s):  
Pience Veralyn Maabuat
Keyword(s):  
Diversity Index ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Transect Line ◽  
Halophila Ovalis ◽  
Wiener Diversity Index ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Index Value

AbstrakEkosistem lamun merupakan salah satu ekosistem bahari yang produktif. Selain sebagai sumber produktifitas primer di perairan, ekosistem lamun juga memiliki arti penting bagi hewan yang hidup di area padang lamun. Penelitian ini dilaksanakan di Pesisir Pantai Molas dengan menggunakan metode garis transek kuadrat, yang dilakukan pada bulan Januari – Juni 2011. Analisis data meliputi perhitungan dengan rumus Krebs dan Fachrul, identifikasi jenis lamun dan penentuan indeks keanekaragaman menggunakan Shannon Wiener. Ada lima jenis lamun yang ditemukan yaitu Enhalus acoroides, Thalassia hemprichii, Halophila ovalis, Cymodocea rotundata dan Syringodium isoetifolium. Lamun E. acoroides dan S. isoetifolium memiliki penyebaran terluas, karena ditemukan di seluruh transek pada lokasi penelitian. Jenis yang jarang dijumpai adalah H. ovalis. Jumlah individu yang ditemukan adalah 130 individu. Nilai indeks keanekaragaman di pesisir Pantai Molas memperlihatkan di wilayah ini keanekaragaman jenis lamun sedang dibandingkan 13 lokasi lainnya di Indonesia.Kata kunci: biodiversitas, Molas, rumput lautAbstractSeagrass ecosystem is one of the productive marine ecosystems. This ecosystem is a source of primary productivity in waters and it is significant for the animals that live in the seagrass areas. This study was conducted in the Molas coastal using the method of transect line squares, in January-June 2011. The analysis included calculation using the formula of Krebs and Fachrul, identification of seagrass species and determination Shannon Wiener diversity index. Five species of seagrass species were found, i.e. Enhalus acoroides, Thalassia hemprichii, Halophila ovalis, Cymodocea rotundata and Syringodium isoetifolium. The total number of individual weres 130. Index value of diversity in the Molas coastal showed that the seagrass diversity in this region were medium compared with 13 other locations in Indonesia.Key Words : biodiversity, Molas, seagrass

scholarly journals ANALISIS HUBUNGAN JARAK DAN KEDALAMAN DENGAN STRUKTUR KOMUNITAS LAMUN DI PANTAI PANCURAN, KEPULAUAN KARIMUNJAWA

2018 ◽  
Vol 7 (4) ◽  
pp. 352-360
Author(s):  
Muhammad Gaffar Ridho ◽  
Supriharyono Supriharyono ◽  
Arif Rahman
Keyword(s):  
Environmental Parameters ◽  
Sampling Technique ◽  
Sediment Characteristics ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Seagrass Community ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Index Of Diversity

Pantai Pancuran adalah salah satu lokasi konservasi padang lamun di Taman Nasional Karimunjawa dengan vegetasi padang lamun. Penelitian ini dilaksanakan pada bulan April 2018 dengan tujuan untuk mengetahui hubungan jarak dan kedalaman dengan struktur komunitas lamun yang meliputi kerapatan dan indeks keanekaragamannya. Materi yang digunakan adalah lamun, dengan menggunakan metode deskripsi eksploratif yang bersifat observasi dengan objek yang diteliti di lapangan. Teknik pengambilan sampel menggunakan kuadran transek ukuran 1x1 meter yang tersebar di 3 stasiun berdasarkan jarak dan kedalaman serta terdapat 6 plot pada setiap stasiunnya. Parameter lingkungan yang diamati meliputi jarak dan kedalaman, nitrat dan fosfat sedimen, salinitas, suhu, derajat keasaman (pH), kecerahan, kecepatan arus, pasang surut, dan karakteristik sedimen. Hubungan jarak dan kedalaman dengan struktur komunitas lamun diproses menggunakan analisis regresi dan korelasi. Hasil penelitian ini didapatkan 6 jenis lamun yaitu Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, Syringodium isoetifolium, Enhalus acoroides, dan Halodule pinifolia. Karakteristik sedimen didominasi oleh pasir halus sebanyak 34,960 %. Korelasi jarak dan kedalaman dengan struktur komunitas lamun diperoleh nilai                 (r = -0,717) pada kerapatan dan ( r = 0,894) pada indeks keanekaragaman.                  Pancuran Beach is one of the seagrass conservation areas in Karimunjawa National Park. This study was conducted in April 2018, in order to investigate the relation of distance and depth on the structure of seagrass community which included the density and index of diversity. The method used in this study is seagrass, using explorative description method that is observation to the object study in the field. The sampling technique uses a 1x1 meter transect quadrant spread over 3 stations based on distance and depth with includes 6 plots at each station. Environmental parameters observed include distance and depth, sediment of nitrate and phosphate, salinity, temperature, acidity (pH), brightness, current velocity, tides, and sediment characteristics. The relationship between distance and depth on the structure of seagrass community processed by regression and correlation analysis . The results of the study found 6 types of seagrass, there were Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis, Syringodium isoetifolium, Enhalus acoroides, and Halodule pinifolia. Sediment characteristics were dominated is fine sand of 34.960%. The correlation of distance and depth on the structure of seagrass community resulted a value (r = -0,717) for density and  (r = 0,894) for index of diversity. 

scholarly journals KELIMPAHAN HEWAN MAKROBENTOS YANG BERASOSIASI PADA HABITAT LAMUN DENGAN JARAK BERBEDA DI PERAIRAN PULAU PRAMUKA KEPULAUAN SERIBU

2012 ◽  
Vol 1 (1) ◽  
pp. 13-18
Author(s):  
Nurul Ekaningrum
Keyword(s):  
Diversity Index ◽  
T Test ◽  
Systematic Sampling ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Significant Difference ◽  
Value Diversity ◽  
Cymodocea Rotundata ◽  
Systematic Sampling Method

Penelitian ini dilaksanakan pada bulan April 2012 di Pulau Pramuka, Kepulauan Seribu. Teknik pengambilan sampel menggunakan metode sistematik sampling artinya sampling yang disusun dengan lokasi dan waktu sampling dibuat dengan pola teratur. Hasil penelitian menunjukkan bahwa jenis lamun yang ditemukan di Pulau Pramuka Kepulauan Seribu adalah Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis dan Syringodium. Kelimpahan hewan makrobentos pada habitat lamun dengan jarak berbeda, yaitu Stasiun A (6 meter) 10 spesies dengan 52 individu dan Stasiun B (50 meter) 12 spesies dengan 69 individu. Nilai Indeks Keanekaragaman (H’) hewan makrobentos pada Stasiun A dan Stasiun B sebesar 2,29 dan 2,39. Nilai Indeks Keseragaman (E) pada Stasiun A dan Stasiun B sebesar 0,95 dan 0,96. Dari hasil uji T- Test didapatkan nilai signifikan sebesar 0,159 (P<0,005), yang berarti tidak ada perbedaan yang signifikan kelimpahan hewan makrobentos pada habitat lamun dengan jarak berbeda atau relatif seragam.Kata kunci : Lamun, Kelimpahan Hewan Makrobentos, Pulau PramukaAbstractThis reseacrh has been conducted on April 2012 in the Pramuka Island, Kepulauan Seribu. Systematic sampling method was used to sampling of makrozoobenthos with the location and time of sampling was made in a regular pattern. The results showed that the type of the seagrass found in Pramuka Island Kepulauan Seribu are Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Halophila ovalis and Syringodium. The abundance of makrozoobenthos on habitat of seagrass with different distances are Station A (6 meters) 10 species with 52 individuals and Station B (50 meters) 12 species with 69 individuals. Value Diversity Index (H ') makrozoobenthos at Station A and Station B are about 2,29 and 2,39. Value Evenness Index (E) in Stasiun A and Stasiun B are about 0,95 dan 0,96. The test T-Test results obtained significant value of 0.159 (P <0.005), which means there is no significant difference on abundance of makrozoobenthos in habitat of seagrass with different distance or relatively uniform.Keywords: Seagrass, Abudance Makrozoobenthos, Pramuka Island

scholarly journals In Intertidal Gastropod community Malalayang Beach Manado North Sulawesi

2015 ◽  
Vol 3 (1) ◽  
pp. 36
Author(s):  
Cornelis Dimas Bugaleng ◽  
Fransine B. Manginsela ◽  
Alex D. Kambey
Keyword(s):  
Relative Density ◽  
Diversity Index ◽  
Intertidal Area ◽  
Dominance Index ◽  
Gastropod Species ◽  
Dead Coral ◽  
Sandy Substrate ◽  
North Sulawesi ◽  
A Value ◽  
Intertidal Gastropod

This study aims to determine the density and relative density of gastropods and diversity index of the community as well as evenness and dominance index in the intertidal beach Malalayang), Manado in North Sulawesi. Gastropods were sampled using quadrate with size 1x1m2 placed systematically and disproportionately on dead coral sandy substrate, mix mud, rocks slightly sandy substrate, and  substrate-sized stones. The study found that there has been a change in the amount of 30 species of gastropod species (Manginsela, 1998) increased to 69 species. While the density of gastropods contained in the intertidal beach of Malalayangis ranging from  13,63individu / m2to currently 2,73-13,63individu / m2 and relative density ranging from 11.22% - 42.78%. Diversity index of organism is high with a value of H '= 2.81497. Evenness index of gastropods in Malalayang Beach intertidalcould be categorized fairly even and almost evenly. Meanwhile, the low dominance values ​​C = 0.2132, indicating that the area has good conditions as a place to live, and yet there is competition, which means, food or a place is suitable for gastropods to live. The intertidal area of Malalayang Beach Manado North Sulawesi substrate are mainly in the form of sandy coral, slightly muddy and rocky. Keywords: gastropod, distribution A B S T R A K Penelitian ini bertujuan mengetahui kepadatan, kepadatan relative  dari masing-masing jenis gastropoda serta indeks keanekaragam komunitas gastropoda, kemerataan dan indeks dominansi di intertidal Pantai Malalayang (di belakang Minanga Hotel), Manado Sulawesi Utara. Pengambilan contoh gastropoda menggunakan kuadrat ukuran 1x1m2 yang ditempatkan secara sistimatis dan proporsional pada substrat karang mati berpasir campur lumpur, substrat bebatuan sedikit berpasir substrat batu-berukuran. Hasil penelitian menemukan telah terjadi perubahan jumlah spesies gastropoda dari 30 spesies (Manginsela, 1998) meningkat menjadi hanya 69 spesies. Sedangkan kepadatan gastropoda yang terdapat di intertidal pantai Malalayang dari berkisar 13,63individu/m2 saat ini 2,73-13,63individu/m2 dan kepadatan relatif berkisar 11,22% - 42,78%. Keanekaragaman jenis organisme tergolong tinggi dengan nilai H’ = 2,81497. Kemerataan jenis gastropoda pada intertidan Pantai Malalayang Manado Sulawesi Utara termasuk kategori cukup merata dan hampir merata. Sedangkan,  Dominasi rendah yakni nilai C = 0.2132,  menunjukkan bahwa daerah tersebut memiliki kondisi yang baik sebagai tempat hidup dan belum terjadi persaingan yang berarti terhadap ruangg, makanan atau tempat hidup bagi gastropoda. Di daerah intertidal Pantai Malalayang Manado Sulawesi Utara Substrat berupa karang mati berpasir, berlumpur tipis dan berbatuan. Kata Kunci : Gastropoda, Distribusi 1Mahasiswa Program Studi MSP FPIK-UNSRAT 2Staf pengajar Fakultas Perikanan dan Ilmu Kelautan Universitas Sam Ratulangi

scholarly journals Community Structure of Seagrass Molas Waters, Sub-district of Bunaken, Manado City of North Sulawesi

2020 ◽  
Vol 8 (1) ◽  
pp. 44
Author(s):  
Ayuni Sara ◽  
Laurentius Th. X. Lalamentik ◽  
Ari B. Rondonuwu
Keyword(s):  
Community Structure ◽  
Distribution Pattern ◽  
Diversity Index ◽  
Environmental Research ◽  
Importance Value Index ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium

A study in community structure seagrass has been done in Molas, Manado City Area, with the aim : 1. To Identify seagrass species from Molas waters, 2. Knowing the community structure  of seagrass in this area, 3. Knowing the condition of aquatic environmental research location. 5 species from 2 families were found in this research i.e. Hydrocharitaceae (Halophila ovalis, Enhalus acoroides,  and Thalassia hemprichii) and Cymodoceaceae (Cymodocea rotundata, Syringodium isoetifolium). The important value of seagrass in the Molas waters showed that Syringodium isoetifolium had important value reaching were 127,31 %. Index of dominance was 0,335 which means no dominance seagrass in this area. The diversity index of seagrass was (H’) 1,328 which is relatively low. The distribution pattern value was 0,5, this shaved that distribution pattern. The temperature in this waters 29.75oC,  salinity 28.5 0/00, the substrate sand  muded  with good water conditions.Keywords: Seagrass; Molas; Identification; Community Structure; Importance Value Index AbstrakPenelitian tentang Struktur Komunitas lamun telah dilakukan di perairan pantai Kelurahan Molas, Kecamatan Bunaken Kota Manado, dengan tujuan: 1. Mengidentifikasi spesies lamun di perairan Molas, 2. Untuk mengetahui Struktur Komunitas Lamun 3. Mengetahui kondisi lingkungan perairan di lokasi penelitian. Lamun yang ditemukan di lokasi penelitian berjumlah 5 spesies dari 2 famili, Hydrocharitaceae (Halophila ovalis, Enhalus acoroides dan Thalassia hemprichii) dan Cymodoceaceae (Cymodocea rotundata dan Syringodium isoetifolium). Indeks nilai penting lamun di perairan Molas menunjukkan bahwa jenis Syringodium isoetifolium memiliki indeks nilai penting tertinggi yang mencapai 127,31 %. Nilai indeks dominansi menunjukkan nilai 0,335 yang berarti tidak ada lamun yang dominan. Indeks keanekaragaman spesies lamun menunjukkan nilai H’ 1,328 yang tergolong rendah. Pola distribusi yang diperoleh nilai 0,5 yang menunjukkan lamun di perairan Molas memiliki pola distribusi mengelompok. Hasil pengukuran parameter lingkungan di perairan Molas yaitu: suhu 29,75 oC, salinitas 28,5 0/00, substrat pasir berlumpur dengan kondisi perairan yang cukup jernih.Kata Kunci: Lamun; Molas; Identifikasi; Struktur Komunitas; Indeks Nilai Penting

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