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 Keanekaragaman Lamun di Pantai Tongkaina Kecamatan Bunaken Kota Manado

Jurnal MIPA ◽  
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.

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.

Community structure of seagrass beds in Arakan, South Minahasa Regency

2013 ◽  
Vol 1 (1) ◽  
pp. 32
Author(s):  
Sendy L Merly ◽  
Billy T Wagey ◽  
Grevo S Gerung
Keyword(s):  
National Park ◽  
Seagrass Meadow ◽  
Diversity Index ◽  
Line Transect ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Important Index ◽  
Syringodium Isoetifolium ◽  
Index Value

Arakan waters is located in front of Arakan Wawontulap district as part of Bunaken National Park. This area has a vast seagrass meadow of 1943.45 ha. Seagrass-Watch method combined with line transect and quadrat methods were used to collected data. Four seagrass species were identified such as Halophila ovalis, Thalassia hemprichii, Enhalus acoroides and Syringodium isoetifolium. Diversity Index (H') was quite high at 1.2071 and was inversely correlated to the value of dominance (D) at 0.3366, and this was supported by the presence of a uniform species (J') of 0.8707. Important Index Value (INP) was highest at station I comprising E. acoroides species, and station II comprising E. acoroides and T. hemprichii, while the third station comprised T. hemprichii. Spatial distribution of the three stations ranged from random to contagious (aggregated)© Perairan Desa Arakan termasuk dalam kawasan Taman Nasional Bunaken wilayah Arakan Wawontulap yang memiliki luas area padang lamun sekitar 1.943,45 Ha. Data dikoleksi menggunakan metode seagrass-watch yang dikombinasikan dengan metoda transek garis dan kuadran. Empat spesies lamun berhasil diidentifikasi yaitu Halophila ovalis, Thalassia hemprichii, Enhalus acoroides dan Syringodium isoetifolium. Nilai Indeks Keanekaragaman (H’) cukup tinggi yakni 1,2071 berbanding terbalik dengan Nilai Dominansi (D) yang rendah yakni 0,3366 dan ditunjang dengan keberadaan spesies yang merata (J’) senilai 0,8707. Indeks Nilai Penting (INP) tertinggi pada Stasiun I diperlihatkan oleh E.acoroides, Stasiun II oleh E.acoroides dan T.hemprichii, dan sedangkan Stasiun III oleh T. hemprichii. Adapun pola penyebaran pada ketiga stasiun ini berkisar antara acak (random) dan mengelompok (contagious)©

scholarly journals STRUKTUR DAN ASOSIASI JENIS LAMUN DI PERAIRAN PULAU-PULAU HIRI, TERNATE, MAITARA DAN TIDORE, MALUKU UTARA

2018 ◽  
Vol 10 (3) ◽  
pp. 651-665 ◽  
Author(s):  
Yunita Ramili ◽  
Dietriech G. Bengen ◽  
Hawis Madduppa ◽  
Mujizat Kawaroe
Keyword(s):  
Coastal Region ◽  
Line Transect ◽  
Small Islands ◽  
Seagrass Species ◽  
Thalassia Hemprichii ◽  
Enhalus Acoroides ◽  
Halophila Ovalis ◽  
Cymodocea Rotundata ◽  
Syringodium Isoetifolium ◽  
Distribution Composition

ABSTRAKKeberadaan ekosistem lamun di perairan pesisir pulau-pulau kecil berperan penting sebagai habitat dan penyedia sumber daya ikan, serta pelindung garis pantai dan daratan pulau-pulau kecil tersebut. Penelitian ini bertujuan untuk menganalisis sebaran, komposisi, kerapatan, penutupan dan asosiasi jenis lamun di perairan pulau-pulau kecil Hiri, Ternate, Maitara dan Tidore, Maluku Utara. Pengambilan data dengan menggunakan metode transek garis dan transek kuadrat. Selanjutnya data dianalisis dengan menggunakan bantuan perangkat lunak MS Excel dan XLstat. Hasil penelitian menunjukkan bahwa Pulau Tidore memiliki jumlah jenis lamun terbanyak yakni delapan jenis lamun dari sembilan jenis lamun yang ditemukan di seluruh lokasi penelitian. Tiga jenis lamun yaitu, Enhalus acoroides, Thalassia hemprichii dan Cymodocea rotundata, menyebar luas dan terdapat di keempat pulau tersebut. Komposisi, kerapatan dan penutupan jenis lamun bervariasi antar stasiun penelitian. Vegetasi lamun yang ditemukan di lokasi penelitian berupa vegetasi campuran yang terdiri dari tiga sampai delapan jenis lamun. E. acoroides banyak ditemukan di Stasiun Mtr1 dan Tte2 tidak berasosiasi dengan spesies lainnya, demikian juga dengan C. serrulata yang ditemukan di Stasiun Mtr2 dan T. hemprichii di Stasiun Tdr2 dan Tdr3. Asosiasi C. rotundata dan Syiringodium isoetifolium terlihat di stasiun Tdr1 dan Hr1, sementara Halophila ovalis dan H. spinulosa  tidak menunjukkan asosiasi dengan jenis lamun lainnya di lokasi penelitian. Secara keseluruhan kondisi lingkungan perairan di keempat pulau tersebut masih tergolong baik dan mampu mendukung ekosistem lamun. ABSTRACTThe existence of seagrass ecosystems in the coastal region of small islands has been playing an essential role as a habitat and the supplier of fish resources, as well as a shore and coastline protector of small islands. This study aimed to  determine the distribution, composition, density, coverage, and associations of seagrass plant in the islands of Hiri, Ternate, Maitara, and Tidore. Data were collected by using line transect method and quadrate transect. Furthermore, data were analyzed by using MS Excel and XLstat software. The results showed that Tidore Island has the highest number of seagrass species namely eight from nine species of seagrasses found in all research sites. Three species of seagrasses, Enhalus acoroides, Thalassia hemprichii, and Cymodocea rotundata, were widespread in all four islands. The composition, density and coverage of seagrass species varied among research stations. Vegetation of seagrasses found in the study site in the form of mixed vegetation consisting of three to eight species. Enhalus acoroides found mostly in Mtr1 and Tte2 stations were not associated with other seagrass species, nor Cymodocea serrulata that found in Mtr2 Station and T. hemprichii at Tdr2 and Tdr3 stations. The associations of C. rotundata and Syringodium isoetifolium were observed at Tdr1 and Hr1 Stations. While Halophila ovalis and Halophila spinulosa showed no association with other seagrass species at the study area. Overall the condition of the marine environment on the four islands is still relatively good and able to support the life of the seagrass ecosystem.

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 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

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>

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