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

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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THE COMMUNITY STRUCTURE OF SEAGRASS IN ENGGANO ISLANDS, BENGKULU

Marine Research in Indonesia ◽

10.14203/mri.v33i1.501 ◽

2008 ◽

Vol 33 (1) ◽

pp. 7-10 ◽

Cited By ~ 1

Author(s):

M. A. Farid ◽

S. Rasidi ◽

M. P. Patria

Keyword(s):

Community Structure ◽

Distribution Pattern ◽

Diversity Index ◽

Enhalus Acoroides ◽

Seagrass Community ◽

Halophila Ovalis ◽

Halodule Uninervis ◽

Cymodocea Rotundata ◽

Syringodium Isoetifolium ◽

Cymodocea Serrulata

The community structure of seagrass in Enggano Islands has been studied in August 2004. The aim of the study was to assess the seagrass community including species composition, density, and distribution pattern. The study was executed using transect quadrat methods, where seagrasses were counted in quadrats of 50 cm2. The result showed that the Enggano Islands seagrasses consist of seven species Enhalus acoroides, Halophila ovalis, Thallasia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halodule uninervis, and Syringodium isoetifolium. The highest density occurred in Dua Island dominated by Thallasia hemprichii (363.3 shoots m-2), while the lowest density occurred in Merbau Island dominated by Enhalus acoroides (0.4 shoot m-2). The highest diversity index (HB) occurred in Kiape Bay (1.446) and the lowest in Merbau Island (0.634). In general, seagrass community in Enggano Islands was dominated by Thallasia hemprichii. All species has clumped distribution pattern (Id > 1).

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

Jurnal MIPA ◽

10.35799/jm.5.1.2016.11194 ◽

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.

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

JURNAL BIOS LOGOS ◽

10.35799/jbl.2.1.2012.376 ◽

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

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

JURNAL ILMIAH PLATAX ◽

10.35800/jip.3.2.2015.13221 ◽

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

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Community Structure of Seagrass Tasik Ria Waters, Sub-district of Tombariri, Minahasa District

JURNAL ILMIAH PLATAX ◽

10.35800/jip.8.1.2020.27603 ◽

2020 ◽

Vol 8 (1) ◽

pp. 53

Author(s):

Berlian Rombetasik ◽

Laurentius Th. X. Lalamentik ◽

Ferdinand Frans Tilaar

Keyword(s):

Community Structure ◽

Diversity Index ◽

Seagrass Species ◽

Thalassia Hemprichii ◽

Enhalus Acoroides ◽

Halophila Ovalis ◽

Chemical Conditions ◽

Syringodium Isoetifolium ◽

Physical And Chemical ◽

Number Of Individuals

Seagrass study has been conducted in Tasik Ria waters in the district of the Minahasa area. The aims research is: 1. to know the physical and chemical conditions at the waters.2. To identify seagrass species found on research location and to study the community structure of seagrass. Four seagrass species have been found in the study i.e. Halophila ovalis, Enhalus acoroides, Thalassia hemprichii, dan Syringodium isoetifilium. The number of individuals of seagrass varied between 316 to 662, species densities were varied between (84.27-176.53/m²), relative densities were (16.06-33.62), index of occurrence were (0.1-0.4), the relative frequency was (10-41.66%), the dominance was (84.27-176.5), the relative dominance were (16.04-33.62%). Thalassia hemprichii has the highest on important value has Index of dominance was 0.265, while the diversity index was 1.354, and the distribution pattern was 1.028.Keywords: Seagrass, Identification, Community Structure, Tasik Ria AbstrakSuatu penelitian mengenai lamun telah dilakukan di Perairan Tasik Ria, Kecamatan Tombariri, Kabupaten Minahasa. Penelitian ini mencakup Struktur Komunitas Lamun di lokasi penelitian. Tujuan penelitian ini adalah 1.Mengetahui kondisi fisik dan kimia perairan 2.Mengidentifikasi spesies lamun yang ada di Perairan Tasik Ria serta mempelajari struktur komunitas lamun.Pada lokasi penelitian ditemukan 4 spesies Lamun,yaitu Halophila ovalis( R. Brown) Hooker F, Enhalus acoroides (Linnaeus f.) Royle, 1839, Thalassia hemprichii (Ehrenberg) Ascherson, dan Syringodium isoetifolium (Ascherson) Dandy. Jumlah tegakan speseis lamun di lokasi penelitian berkisar dari 316 hingga 662 individu, kepadatan spesies (84.27-176.53/m²), kepadatan relatif (16.05-33.62%), frekuensi kehadiran (0.1-0.41), frekuensi relatif (10-41.66%), dominasi (84.27-176.53), dominasi relatif (16.04-33.62%). indeks nilai penting lamun di Perairan Tasik Ria menunjukkan bahwa Thalassia hemprichii memiliki indeks nilai penting paling tinggi di antara ke 4 spesies lamun yakni 108.91%. Indeks dominasi (0.265), indeks keanekaragaman (1.354), pola distribusi (1.028).Kata Kunci : Lamun, Identifikasi, Struktur Komunitas, Tasik Ria

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Keanekaragaman Lamun di Pantai Tongkaina Kecamatan Bunaken Kota Manado

Jurnal MIPA ◽

10.35799/jm.3.1.2014.3895 ◽

2014 ◽

Vol 3 (1) ◽

pp. 1

Author(s):

Klion Ngongira ◽

Marnix L. D. Langoy ◽

Deidy Yulius Katili ◽

Pience V. Maabuat

Keyword(s):

Diversity Index ◽

Wide Distribution ◽

Line Transect ◽

Thalassia Hemprichii ◽

Purposive Sampling ◽

Enhalus Acoroides ◽

Halophila Ovalis ◽

Sea Grass ◽

Syringodium Isoetifolium ◽

Cymodocea Serrulata

Lamun adalah tumbuhan berbunga yang dapat tumbuh dengan baik pada lingkungan laut dangkal. Penelitian ini dilaksanakan di pantai Tongkaina dengan menggunakan metode observasi lapangan pada purposive sampling dengan garis transek kuadrat. Analisis data meliputi perhitungan dengan rumus Krebs dan Fachrul, identifikasi jenis lamun dan penentuan indeks keanekaragaman menggunakan Shannon Wiener. Berdasarkan hasil penelitian terdapat tujuh jenis lamun yang ditemukan yaitu Enhalus acoroides, Thalassia hemprichii, Halophila ovalis, Cymodocea rotundata, Cymodocea serrulata, Holodule pinifolia dan Syringodium isoetifolium. 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 Holodule pinifolia. Jumlah individu yang ditemukan adalah 2993 individu. Nilai indeks keanekaragaman di pesisir Pantai Molas memperlihatkan bahwa di wilayah ini keanekaragaman jenis lamun sedang bila dibandingkan dengan 13 lokasi lainnya di Indonesia.Sea grasses are flowering plants that can grow well in shallow marine environments. This research was conducted in Tongkaina Beach using field observation, with purposive sampling using line transect squares. Data analysis was performed using the formula of Krebs and Fachrul. Identification of sea grass and determination of diversity index is done using Shannon Wiener. Results obtained in this research showed that there are seven types of sea grasses, namely Enhalus acaroides, Thalassia hemprichii, Halophila ovalis, Cymodecea rotundata, Cymodocea serrulata, Holodule pinifolia, and Syringodium isoetifolium. 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 Holodule pinifolia. Number of individual found was 2993. Value of diversity index at Tongkaina Beach showed that this area has moderate sea grass diversity compared to other 13 locations in Indonesia.

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

JURNAL ILMIAH PLATAX ◽

10.35800/jip.6.2.2018.20619 ◽

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

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

JURNAL ILMIAH PLATAX ◽

10.35800/jip.1.4.2013.3699 ◽

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

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

JURNAL PESISIR DAN LAUT TROPIS ◽

10.35800/jplt.9.2.2021.34836 ◽

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

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DAMPAK PERUBAHAN PENGGUNAAN LAHAN TERHADAP KONDISI PADANG LAMUN DI PERAIRAN TIMUR PULAU BINTAN KEPULAUAN RIAU

Jurnal Segara ◽

10.15578/segara.v14i1.6630 ◽

2018 ◽

Vol 14 (1) ◽

Author(s):

Indarto Happy Supriyadi ◽

Ricky Rositasari ◽

Marindah Yulia Iswari

Keyword(s):

Thalassia Hemprichii ◽

Enhalus Acoroides ◽

Halophila Ovalis ◽

Halodule Uninervis ◽

Cymodocea Rotundata ◽

Syringodium Isoetifolium ◽

Cymodocea Serrulata

Padang lamun memiliki peran penting sebagai sumber utama produktivitas primer atau penghasil bahan organik, habitat untuk berbagai biota, tempat asuhan, tempat memijah, sumber makanan bagi biota langka dan penyokong keanekaragaman jenis-jenis biota laut serta bernilai ekonomis dari jasa ekosistem lamun. Aktivitas pembangunan di wilayah pesisir yang terus meningkat telah mengakibatkan kerusakan padang lamun di perairan timur pulau Bintan. Saat ini kajian terbaru terkait dengan kondisi lamun belum tersedia. Kajian ini dilakukan pada Mei dan September (2015-2016) dengan tujuan untuk mengetahui dampak perubahan tutupan lahan terhadap kondisi lamun di perairan timur pulau Bintan. Kondisi lamun ditentukan berdasarkan persentase tutupan lamun. Analisis perubahan penggunaan lahan menggunakan perangkat lunak ENVI 5.1 dan ArcGIS 10.1. Pengukuran debit sungai dan penanganan sampel air dilakukan di lapangan dan laboratorium P2O-LIPI Jakarta. Hasil penelitian menunjukkan bahwa perubahan penggunaan lahan menjadi lahan terbuka, perkebunan dan semak belukar pada DAS Kawal telah memberikan dampak menurunnya kondisi lamun khususnya di sekitar muara Sungai Kawal. Secara umum kondisi lamun di perairan timur Pulau Bintan menurun ditunjukkan dengan persentase tutupan lamun yaitu 46 % (2006) dan 41 % (2015). Dalam penelitian ini ditemukan tujuh spesies lamun, antara lain Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulata, Halophila ovalis, Halodule uninervis dan Syringodium isoetifolium.

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