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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL ILMIAH PLATAX
Kepel, Rene Ch.
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Anatomical characteristics of macroalgal species from Bombuyanoi Island, East Bolaang Mongondow Regency, North Sulawesi Patra, Frian; Kepel, Rene Ch.; Lumingas, Lawrence J.L.; Gerung, Grevo S.; Kondoy, Khristin F.; Sumilat, Deiske A.; Undap, Suzanne L.
AQUATIC SCIENCE & MANAGEMENT Vol 9, No 2 (2021): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v9i2.35229

Abstract

This research aims to study the anatomical structure of macroalgae. Sample of macroalga was collected by using Line Intercept Transect (LIT) method with sampling quadrat. Macroalgae samples were dried and separated from the roots, stems, leaves and receptacles (if present). Samples were cut transversely and longitudinally at each section and observed under binoculared microscope of Olympus CX with monitor. Based on the histology, anatomical structure of macroalgae species can be divided into two tissues from outside to inside, namely cortex and medullary cells. The cortex is composed of one layer or more. The cortex is the area between the epidermis and the central column. The medulla cells only have one layer which is the largest layer. Based on the observation result of cells type from observed spesies Eucheuma denticilatum, Gracilaria arcuata, Hydropuntia edulis, G. salicornia, Hypnea valentiae, Turbinaria deccurens, and T. ornata, it shows that cells of medulla become small toward cortex.Indonesian title:  Karakteristik anatomi jenis makroalga dari Pulau Bombuyanoi, Kabupaten Bolaang Mongondow Timur, Sulawesi Utara
Macroalgae Community Structure in Tanjung Merah Waters, Bitung City Achmad, Febrio V.; Kepel, Rene Ch.; Mandagi, Stephanus Vianny; Tilaar, Ferdinand F.; Tombokan, John L.; Ngangi, Edwin L. A.
Jurnal Ilmiah Platax Vol. 9 No. 1 (2021): ISSUE JANUARY - JUNE 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.9.1.2021.34427

Abstract

Seaweed is a component of coastal ecosystems that makes a major contribution to the Indonesian economy. This marine plant is a potential food source and industrial raw materials that can be used to improve people's welfare as these marine macroalgae are widely distributed in Indonesian waters. This study was carried out because of its important role for the ecosystems and the economy of the country. The purpose of this research is to determine the community structure of this macroalgae in the waters of Tanjung Merah Village of Matuari District of Bitung City. The data were collected from January 2021 to March 2021 using a transect of 1 x 1 m2 which was placed along a 100 m line transect with 5 m intervals. The macroalgae found were 6 species consisting of 2 types of Chlorophyta class and 4 species of Rhodophyta class. The macroalgae diversity index of around is 1.06 categorized as moderate diversity; the index of dominant is 0.44 moderate and the evenness index is 1.79 or low.Keywords: Macroalgae; Community; Diversity.AbstrakRumput laut merupakkan komponen ekosistem wilayah pesisir yang memberikkan kontribusi yang besar bagi ekonomi Indonesia. Potensi sumberdaya hayati laut Sulawesi Utara, khususnya Kota Bitung yang cukup potensial untuk dapat dimanfaatkan sebagai sumber pangan dan bahan baku industri guna peningkatan kesejahteran masyarakatkarena makroalga termasuk salah satu sumberdaya hayati laut yang banyak terdapat di perairan Indonesia. Makroalga memiliki potensi besar untuk dikembangkan, karena memiliki peranan penting baik dari aspek ekologi dan memiliki nilai ekonomi.  Tujuan penelitian ini adalah untuk mengetahui struktur komunitas makroalga yang ada di perairan Kelurahan Tanjung Merah Kecamatan Matuari Kota Bitung. Penelitian ini dilaksanakan pada bulan Januari 2021 sampai Maret 2021. Data dikumpulkan dengan cara di sampling menggunakan kuadrat berukuran 1x 1 m2 yang diletakkan pada garis transek sepanjang 100 m dengan interval 5 m. Makroalga yang ditemukan 6 spesies yang terdiri atas Kelas Chlorophyta berjumlah 2 jenis, dan kelas Rhodophyta 4 jenis. Indeks keanekaragaman makroalga sekitar 1.06 dikategorikan sedang, indeks dominasi 0.44 dikategorikan rendah dan untuk indeks kemerataan 1,79 dikategorikkan rendah.Kata kunci: Makroalga; Komunitas; Keanekaragaman
Analysis Of Types Of Carotenoid Pigments In Crab Sesarmops sp From Manado By Coast Adrian, Melinda Margareta; Paransa, Darus S. J; Paulus, James J. H; Kawung, Nickson J.; Bara, Robert A.; Kepel, Rene Ch.
Jurnal Ilmiah Platax Vol. 9 No. 2 (2021): ISSUE JULY-DECEMBER 2021
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.9.2.2021.35127

Abstract

Carotenoid pigments are a group of pigments that are yellow, orange, and red-orange in color. Pigments are natural dyes found in plants and animals, extracts of carotenoid pigments can be separated by chromatographic methods where the common chromatographic methods in determining the type of pigment are Column Chromatography (CC) and Thin Layer Chromatography (TLC). The purpose of this study was to determine the types of pigments contained in the carapace extract of the male crab Sesarmops sp. The Sesarmops sp crab has a brown dorsal carapace with blackish-brown leg spots known as mangrove crabs. Crabs in the Sesarmidae family have a carapace formation and wide legs, do not have swimming legs, and have a pair of claws that are faded purple, the presence of these colors can be identified as containing carotenoid pigments. The results of this study obtained the content of carotenoid pigment 25.2 g/gr and the value of the concentration of carotenoid pigment in the male crab extract Sesarmops sp 10.99 g. The results of the separation of the total pigment extract using column chromatography obtained the types of pigments -carotene, Ekinenon, Zeaxanthin, and Astaxanthin. Keywords: Column Chromatography (CC); Carotenoids; Sesarmops sp                                                                       AbstrakPigmen karotenoid adalah sekelompok pigmen yang berwarna kuning, oranye dan merah oranye. Pigmen adalah zat warna alami yang terdapat pada tumbuhan  dan hewan, ekstrak pigmen karotenoid dapat dipisahkan dengan metode kromatografi yang dimana metode kromatografi umum dalam menentukan jenis pigmen adalah Kromatografi Kolom (KK) dan Kromatografi Lapis Tipis (KLT). Tujuan dari penelitian ini untuk mengetahui jenis-jenis pigmen apa saja yang terdapar pada ekstrak karapas kepiting jantan Sesarmops sp. Kepiting Sesarmops sp memiliki karapas dorsal bewarna coklat dengan bintik kaki coklat kehitaman yang dikenal sebagai kepiting mangrove. Kepiting dalam keluarga sesarmidae memiliki bentukan karapas dan kaki yang lebar tidak memiliki kaki renang serta memiliki sepasang capit berwarna ungu pudar, adanya warna tersebut kepiting dapat diidentikasikan mengandung jenis pigmen karotenoid.  Dari hasil penelitian ini mendapatkan kandungan pigmen karotenoid 25,2 dan nilai konsentrasi pigmen karotenoid pada ekstrak kepiting jantan Sesarmops sp 10,99 . Hasil pemisahan dari ekstrak pigmen total menggunakan kromatografi kolom didapatkan jenis pigmen β-karoten, Ekinenon, Zeaxantin dan Astaxantin
Carbon Absorption in Seagrasses in Tongkaina Coastal Waters, Bunaken District, Manado City, North Sulawesi Namoua, Dilivia J.; Wantasen, Adnan S.; Kondoy, Khristin I. F.; Kepel, Rene Ch.; Menajang, Febry S. I.; Pelle, Wilmy
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

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Abstract

This study was conducted to determine the types of seagrasses and calculate biomass and calculate how much carbon absorption in seagrasses was found in the location of Tongkaina Beach, Bunaken District, Manado City, North Sulawesi. The sampling procedure in the field is the method of cruising surveys. A cruising survey is a sample collection method that is carried out by walking through the coastal area of all seagrasses found.  After the sampling at the site is completed, the sample in the inventory is then photographed. The samples that have been obtained are analyzed in the laboratory using the loss on ignition (LOI) method. The results of the study on Tongkaina coastal waters covering an area of 25,000 meters with a coastal length of ±500 meters, in an area parallel to the coastline as wide as ±50 meters towards the sea and six types of seagrasses were obtained, namely: Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium, Cymodocea rotundata, Halodule uninervis, and Halodule pinifolia.  The biomass in seagrasses found had an average value of 78.10% with the highest individual seagrass biomass found in seagrass type Enhalus acoroides with a biomass value of 87.23grams of dry weight (gbk)/individual and the lowest type of seagrass individual biomass value was found in seagrass type seagrass with a biomass value of 66.67grams of dry weight (gbk)/individual.  The total carbon content calculated in the entire seagrass obtained was 46,0941gCKeywords: Tongkaina Beach; seagrasses; biomass; carbon absorptionAbstrakPenelitian ini dilakukan untuk mengetahui jenis-jenis lamun dan menghitung biomassa serta menghitung berapa serapan karbon pada lamun yang ditemukan dilokasi Perairan Pantai Tongkaina Kecamatan Bunaken Kota Manado Provinsi Sulawesi Utara. Prosedur pengambilan sampel di lapangan menggunakan metode survei jelajah. Survei jelajah adalah metode pengumpulan sampel yang di lakukan dengan cara menyusuri daerah pantai terhadap semua lamun yang ditemukan. Setelah pengambilan sampel di lokasi selesai, sampel di inventarisir kemudian difoto. Sampel yang telah diperoleh dianalisa di laboratorium dengan menggunakann metode loss on ignition (LOI). Hasil penelitian pada perairan pantai Tongkaina seluas 25.000 meter dengan panjang pantai ±500 meter sejajar garis pantai dan lebar ±50 meter ke arah laut.  Ditemukan enam jenis lamun yaitu: Enhalus acoroides, Thalassia hemprichii, Syringodium isoetifolium, Cymodocea rotundata, Halodule uninervis dan Halodule pinifolia. Biomassa pada lamun yang ditemukan memiliki nilai rata-rata 78,53% dengan biomassa individu lamun tertinggi terdapat pada lamun jenis Enhalus acoroides dengan nilai biomassa mencapai 87,23gram berat kering (gbk)/individu dan nilai biomassa individu jenis lamun terendah terdapat pada lamun jenis Syringodium isoetifolium dengan nilai biomassa 66,67gram berat kering (gbk)/individu. Untuk total kandungan karbon yang dihitung pada keseluruhan lamun yang didapat sebesar 46,0941gC.Kata kunci: Pantai Tongkaina; Lamun; biomasa, serapan carbon
Gastropod Community An Vertical Distribution Pattern Of Littoraria Scabra (Linnaeus, 1758) In Mangrove Ecosystem, Tombariri District, Nort Sulawesi Bilaleya, Iman; Lalita, Jans; Mantiri, Rose O. S. E.; Kepel, Rene Ch.; Lumingas, Lawrence J.; Lohoo, Anneke V.
Jurnal Ilmiah Platax Vol. 11 No. 1 (2023): ISSUE JANUARY-JUNE 2023
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v11i1.46497

Abstract

The Coast water of Tombariri District is an area that has a main ecosystem like mangroves, seagrass, and reef. This research is to aim to know the species various, the structure of the gastropod community, and the vertical distribution pattern of Littoraria scabra in the mangrove ecosystem in Tombariri District, North Sulawesi. Process of gastropod sampling horizontally where transects were put horizontal coastline on every location including Mokupa, Elu, and Tambala. Every transect long has 65 m and also has every transect has 15 quadrats where every quadrat is one-meter square. Therefore, every transect has 15 quadrats, so a total of 45 quadrats. Every quadrant was put systematic method, that is, at terrestrial closing mangrove of 5 quadrats, middle mangrove of 5 quadrats, and coast close mangrove of 5 quadrats. Process of sampling particularly L.scabra where taking vertically, especially on microhabitats that is, roots, stems, branches, and leaves of mangroves. High measuring by meter unit, conducted from the ground where L.scabra found at mangrove until the top vegetation. Based on the result of observation on the identification of gastropod sampling found in the mangrove ecosystem, Tombariri District, North Sulawesi as many 235 of individuals consisting of 5 orders, 23 families, and 32 genera having 78 species. The density of species on every location Mokupa, Elu and Tambala, that is, (D) = 4.60, 5.47, and 5.60 in ind/m2, index of diversity,(H) = 2.54, 3.07, and 3.51 and index of dominance, ID = 0.04, 0.07 and 0.13. Keywords: Microhabitat, density, diversity, and dominance Abstrak Perairan pantai Kecamatan Tombariri merupakan daerah yang memiliki ekosistim utama pesisir seperti mangrove, lamun, dan terumbu karang. Penelitian ini bertujuan untuk mengetahui jenis-jenis, struktur komunitas gastropoda dan pola distribusi vertikal spesies Littoraria scabra di ekosistem mangrove Kecamatan Tombariri, Sulawesi Utara. Proses pengambilan sampel gastropoda secara horizontal, di mana transek ditempatkan sejajar garis pantai pada setiap lokasi yakni di Mokupa, Elu, dan Tambala. Panjang setiap transek 65 m dan setiap transek memiliki 15 kuadrat di mana kuadrat berukuran 1 x 1 m. Setiap transek punya 15 kuadrat sehingga total kuadrat seluruh transek adalah 45 kuadrat. Penempatan kuadrat menggunakan metode sistematik yaitu di bagian darat 5 kuadrat, pertengahan 5 kuadrat dan mangrove pinggir laut 5 kuadrat. Proses pengambilan sampel secara vertikal khusus Littoraria scabra, di mikrohabitat akar, batang, cabang dan daun mangrove,Sementara pengambilan sampel L.scabra diukur ketinggian di mana spesies Littoraria scabra ditemukan ldi pohon mangrove dengan menggunakan meteran, dimulai dari dasar sampai ke ujung pohon mangrove. Berdasarkan hasil pengamatan dan identifikasi sampel gastropoda yang ditemukan di ekosistem mangrove Kecamatan Tombariri, Sulawesi Utara ditemukan sebanyak 235 individu yang terbagi ke dalam 5 ordo, 23 famili dan 32 genera dari 78 spesies. Kepadatan Jenis pada masing-masing lokasi = 4,60, 5,47, dan 5,60 ind/m2. Keanekaragaman H’= 2,54, 3,07, dan 3,51. Dominansi C= 0,04, 0,07, dan 0,13. Kata Kunci : Mikrohabitat, Kepadatan, Keanekaragaman, Dominansi.
Seagrass Community Structure in Mangket Beach Water, Kema District, North Minahasa Regency Wakkary, Paramitha G.; Mandagi, Stephanus V.; Kondoy, Khristin I. F.; Kepel, Rene Ch.; Menajang, Febry S. I.; Rangan, Jety
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.50365

Abstract

The purpose of this study was to determine the types of seagrasses, density, relative density, frequency, diversity index, dominance index, and environmental factors in Mangket coastal waters. This research method is the quadratic and line transect. This research was conducted in the waters of Mangket Beach, Kema District, North Minahasa Regency on November 27, 2022. There were 3 species of seagrass found in Mangket Beach waters, namely, Cymodocea rotundata, Cymodocea serrullata, and Enhalus acoroides. The number of seagrass species stands at the study site ranged from 105-814 individuals, species density (4.38-33.92 individuals/m2), relative density (6.54-50.72%), frequency of presence (1.67-4 .00), relative frequency (17.24-41.38%), diversity index H'= (0.38) and dominance index (0.004-0.26). The environmental conditions in the waters are temperature 29.5°C, salinity 32‰, and sandy and sandy mud substrates. Keywords: Mangket Beach, seagrasses, community structures. Abstrak Tujuan penelitian ini adalah untuk mengetahui Struktur Komunitas Lamun meliputi jenis-jenis lamun, kepadatan, kepadatan relatif, frekuensi, frekuensi relatif, indeks keanekaragaman, indeks dominasi dan faktor lingkungan perairan pantai Mangket. Metode penelitian ini adalah kuadrat dan line transek. Penelitian ini dilaksanakan di perairan Pantai Mangket Kecamatan Kema Kabupaten Minahasa Utara pada tanggal 27 November 2022. Spesies lamun yang ditemukan di perairan Pantai Mangket berjumlah 3 yaitu, Cymodocea rotundata, Cymodocea serrullata dan Enhalus acoroides. Jumlah tegakan spesies lamun di lokasi penelitian berkisar dari 105-814 individu, kepadatan spesies (4,38-33,92 individu/m2), kepadatan relatif (6,54-50,72%), frekuensi kehadiran (1,67-4,00), frekuensi relatif (17,24-41,38%), indeks keanekaragaman H’= (0,38) dan indeks dominasi (0,004-0,26). Kondisi lingkungan di perairan yakni suhu 29,5°C, salinitas 32‰, substrat lumpur berpasir dan berpasir. Kata Kunci: Pantai Mangket, lamun, struktur komunitas.
Morphology and Anatomy of Macroalgae Community in Rap Rap Coastal Waters, Tongkaina Village, Manado City Rafii, Keken Angliyana; Kepel, Rene Ch.; Kondoy, Khristin F I.; Mandagi, Stephanus V.; Tombokan, John L.; Lohoo, Anneke V.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.52140

Abstract

Macroalgae are low-level plants that generally grow attached to certain substrates such as corals, mud, sand, rocks, and other hard objects. Macroalgae are algae that have a macroscopic body shape and size. A community is a group of beings living together in the same place. Thus the macroalgae community is a group of lower plants that have macroscopic body sizes living together. The coastal area of Rap-Rap Beach is located in Tongkaina Village, Manado City, North Sulawesi Province. This location is one of the stable macroalgae habitats, meaning that there is still little habitat damage that occurs, so macroalgae can still be obtained directly from nature. This coast is also known as mangrove ecotourism and the path to Bunaken Island. The purpose of this study is to describe the morphology and anatomy of each macroalgae species. Data collection using the Line Transect method with a squared sampling technique was carried out at the lowest low tide. Temperature measurement using a thermometer and salinity using a refractometer, and for determination of substrate visually see the type of substrate. Keywords: morphology, anatomy, community, macroalgae, Rap Rap. Abstrak Makroalga merupakan tumbuhan tingkat rendah yang umumnya tumbuh melekat pada substrat tertentu seperti pada karang, lumpur, pasir, batu dan benda keras lainnya. Makroalga yaitu alga yang memiliki bentuk dan ukuran tubuh makroskopik. Komunitas adalah kelompok makhluk yang hidup secara bersama-sama dalam suatu tempat yang bersamaan. Dengan demikian komunitas makroalga adalah kelompok tumbuhan rendah yang memiliki ukuran tubuh makroskopik yang hidup bersamaan. Wilayah pesisir Pantai Rap-Rap terletak di Kelurahan Tongkaina, Kota Manado, Provinsi Sulawesi Utara. Lokasi ini merupakan salah satu habitat makroalga yang stabil artinya masih sedikit kerusakan habitat yang terjadi, sehingga makroalga masih dapat diperoleh secara langsung dari alam. Pesisir ini juga dikenal sebagai ekowisata mangrove dan jalur ke Pulau Bunaken. Tujuan penelitian ini adalah mendeskripsikan morfologi dan anatomi masing-masing spesies makroalga. Pengambilan data menggunakan metode Line Transect dengan teknik sampling kuadrat yang dilakukan pada saat surut terendah. Pengukuran suhu menggunakan Thermometer dan salinitas menggunakan Refraktometer, dan untuk penentuan substrat dilihat secara visual jenis dari substrat tersebut. Kata kunci: morfologi, anatomi, komunitas, makroalga, Rap Rap.
Morphometric study of Seagrass Enhalus acoroides (Linnaeus f.) Royle, 1839 in Coastal Waters of Budo Village Leslida, Ayu; Kepel, Rene Ch.; Menajang, Febry S. I.; Kondoy, Khristin F I.; Lumingas, Lawrence J. L.; Mantiri, Rose O. S. E.
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.54481

Abstract

This research concerns the morphometry of seagrass E. acoroides (Linnaeus) Royle in 1839 in the coastal waters of Budo Village, Wori District, North Minahasa Regency. The existence of seagrass ecosystems in coastal waters is so important that it is necessary to carry out morphometric studies of seagrass, both for scientific purposes and for the sake of knowledge about seagrass itself. This research aims to describe the morphometrics of E. acoroides seagrass on the coast of Budo Village, Wori District, North Minahasa Regency, to compare the morphometrics of E. acoroides seagrass based on sampling stations, and to determine the condition of the aquatic environment (temperature, salinity, pH, substrate). The research location was divided into 3 sampling stations, namely the first mangrove area with 20 individuals, the second seagrass area with 30 individuals, and the third coral reef area with 10 individuals. The sampling process is carried out using a roaming survey method, the sample is washed and put into a plastic sample which will then be measured. The results statistically show that E. acoroides species in the coastal waters of Budo Village at three stations show significant differences in morphometric size, where station three is smaller than stations one and two. Environmental conditions and existing environmental parameters cause this. The condition of the environmental parameters at the three stations is still within safe limits, so it is still good for seagrass growth. Keywords: Seagrass, Enhalus acoroides, Morphometrics, Budo Village Abstrak Penelitian ini mengenai Morfometrik Lamun E. acoroides (Linneaus f.) Royle, 1839 di Perairan Pesisir Desa Budo, Kecamatan Wori, Kabupaten Minahasa Utara. Keberadaan ekosistem lamun di perairan pantai ini sangat penting sehingga perlu adanya kajian mengenai morfometrik lamun, baik untuk kepentingan ilmiah maupun untuk kepentingan pengetahuan tentang lamun itu sendiri. Adapun tujuan dari penelitian ini yaitu Mendeskripsikan morfometrik dari lamun E. acoroides di pesisir pantai Desa Budo, Kecamatan Wori, Kabupaten Minahasa Utara, Membandingkan morfometrik lamun E. acoroides berdasarkan stasiun pengambilan sampel,dan Mengetahui kondisi lingkungan perairan (suhu, salinitas, pH, substrat). Lokasi penelitian dibagi 3 stasiun untuk pengambilan sampel yaitu stasiun satu daerah mangrove dengan mengambil 20 individu, stasiun dua daerah lamun 30 individu, dan stasiun tiga daerah terumbu karang dengan mengambil 10 individu. Proses pengambilan sampel dilakukan dengan metode survei jelajah, sampel dicuci dan dimasukkan ke dalam plastik sampel yang kemudian akan diukur. Hasil yang diperoleh secara statistik bahwa spesies Enhalus acoroides di Pesisir Pantai Desa Budo pada tiga stasiun terlihat ada perbedaan nyata untuk ukuran morfometriknya, dimana stasiun tiga ukurannya lebih kecil dibanding stasiun satu dan dua. Hal ini karena kondisi lingkungan dan parameter lingkungan yang ada. Kondisi parameter lingkungan pada tiga stasiun masih dalam batas aman dimana masih baik untuk pertumbuhan lamun. Kata Kunci : Lamun, Morfometrik, Enhalus acoroides, Desa Budo
Community Structure of Macroalgae in the Coastal Waters of Tiwoho Village, Wori District, North Minahasa Regency Iyanleba, Jonathan Yohanes; Kepel, Rene Ch.; Tombokan, John Leonard; Kondoy, Khristin F. I.; Mandagi, Stephanus Vianny; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 13 No. 1 (2025): ISSUE JANUARY-JUNE 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i1.60693

Abstract

The purpose of this study is to describe the morphology and anatomy of each macroalgae species and to analyze the community structure of macroalgae from the study location. Data collection was carried out using the Line Transect method with quadrat sampling techniques conducted at the lowest tide. Temperature measurement was done using a thermometer and salinity using a refractometer, while substrate determination was visually assessed based on the type of substrate. The results of this study found 7 species, consisting of 1 species of red algae, 4 species of brown algae, and 2 species of green algae. The morphology of these algae types varies with different anatomies based on cross and longitudinal sections of each part of the algal thallus. The highest species density was Turbinaria ornata (transect 1), while the lowest density was Halimeda opuntia and Sargassum polycystum (transect 1), Turbinaria ornata (transect 2 and transect 3). The macroalgae diversity index values on the three transects were in the medium category. The species evenness index values on the three transects were stable. The species richness index values on the three transects were in the low category. The dominance index values on the three transects were in the low category. Keywords: Macroalgae, Community, Transect, Quadrat, Tiwoho. Abstrak Tujuan penelitian ini adalah mendeskripsikan morfologi dan anatomi masing-masing spesies makroalga, dan menganalisis stuktur komunitas makroalga dari lokasi penelitian. Pengambilan data menggunakan metode Line Transect dengan teknik sampling kuadrat yang dilakukan pada saat surut terendah. Pengukuran suhu menggunakan Termometer dan salinitas menggunakan Refraktometer, dan untuk penentuan substrat dilihat secara visual jenis dari substrat tersebut. Hasil penelitian ini ditemukan 7 spesies yang terdiri dari 1 spesies alga merah, 4 spesies alga coklat dan 2 spesies alga hijau. Morfologi jenis-jenis alga tersebut beragam dengan anatomi yang berbeda berdasarkan potongan melintang dan memanjang dari masing-masing bagian thallus alga. Kepadatan spesies tertinggi yaitu Turbinaria ornata (transek 1) sedangkan kepadatan terendah yaitu Halimeda opuntia dan Sargassum polycystum (transek 1), Turbinaria ornata (transek 2 dan transek 3). Nilai indeks keanekaragaman makroalga pada ketiga transek termasuk dalam kategori sedang. Nilai indeks kemerataan jenis pada ketiga transek termasuk dalam keadaan stabil. Nilai indeks kekayaan jenis pada ketiga transek termasuk dalam kategori rendah. Nilai indeks dominasi pada ketiga transek termasuk dalam kategori rendah. Kata kunci: Makroalga, Komunitas, Transek, Kuadrat, Tiwoho.
Co-Authors Achmad, Febrio V. Adnan Wantasen Adrian, Melinda Margareta Alex D. Kambey Anneke V. Lohoo Bilaleya, Iman Darus S. Paransa Deiske Adeliene Sumilat, Deiske Adeliene Edwin D Ngangi Grevo S Gerung Iyanleba, Jonathan Yohanes John L. Tombokan Khristin I. F. Kondoy, Khristin I. F. Kondoy, Khristin F I. Kondoy, Khristin F. I. Lalita, Jans Lawrence J. L. Lumingas Lawrence J.L. Lumingas, Lawrence J.L. Leslida, Ayu Lumingas, Lawrence J. Mandagi, Stephanus V. Mandagi, Stephanus Vianny Menajang, Febry S. I. Namoua, Dilivia J. Nickson J. Kawung, Nickson J. Patra, Frian Paulus, James J. H Pelle, Wilmy Rafii, Keken Angliyana Rangan, Jety Robert A. Bara Rose O. S. E. Mantiri, Rose O. S. E. Suzanne L Undap Tilaar, Ferdinand F. Tombokan, John Leonard Wakkary, Paramitha G.