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All Journal AQUATIC SCIENCE & MANAGEMENT JURNAL PESISIR DAN LAUT TROPIS JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS
Khristin I. F. Kondoy, Khristin I. F.
Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science

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Identifikasi jenis alga Koralin di pulau Salawati, Waigeo Barat kepulauan Raja Ampat dan pantai Malalayang kota Manado Tampanguma, Biondi; Gerung, Grevo; Sondak, Calvyn; Wagey, Billy; Manembu, Indri; Kondoy, Khristin
JURNAL PESISIR DAN LAUT TROPIS Vol 5, No 1 (2017): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.5.1.2017.14986

Abstract

Alga koralin merupakan kelompok alga laut (seaweed) yang diklasifikasikan kedalam Divisi Rhodophyta, Kelas Florideophyceae, Ordo Cryptonemiales, Famili Corallinaceae. Secara morfologi (external appearance) kelompok famili ini terbagi atas 2 bagian, yaitu: alga koralin bersegmen (articulated/geniculated Coralline Algae) dan alga koralin tidak bersegmen (non-articulated/nongeniculated Coralline Algae). Tujuan penelitian ini dilakukan untuk mengidentifikasi jenis alga koralin dan mendeskripsikan morfologi alga koralin. Pengambilan sampel dilakukan di Pulau Salawati, Waigeo Barat Kepulauan Raja Ampat dan Pantai Malalayang Kota Manado. Pengambilan sampel dilakukan dengan bantuan peralatan SCUBA dan diambil pada kedalaman 1-5 meter dengan menggunakan metode survey jelajah. Setiap alga koralin yang di ambil dimasukan ke dalam plastik sampel. Sampel alga koralin di bawah ke Laboratorium Biologi Kelautan FPIK UNSRAT. Selanjutnya, setiap alga diidentifikasi, dicatat dan didokumentasi menggunakan kamera. Penelitian ini berhasil mengidentifikasi berjumlah 4 spesies alga koralin. Keempat spesies tersebut yaitu 1 Mastophora rosea dari Waigeo Barat, 2 dari Pulau Salawati Amphiroa rigida dan Galaxaura rugosa, dan 1 dari Pantai Malalayang Peyssonnelia caulifera.
Morfologi Sargassum sp dI kepulauan RAJA AMPAT, PAPUA BARAT Pansing, Jenita; Gerung, Grevo; Sondak, Calvyn; Wagey, Billy; Ompi, Medy; Kondoy, Khristin
JURNAL PESISIR DAN LAUT TROPIS Vol 5, No 1 (2017): JURNAL PESISIR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.5.1.2017.14990

Abstract

Sargassum sp. merupakan salah satu sumberdaya alam pesisir yang memiliki fungsi ekologis dan ekonomis bagi masyarakat pesisir. Di Kepulauan Raja Ampat ini belum banyak alga Sargassum yang di eksplorasi. Alga Sargassum memiliki berbagai macam bentuk morfologi tallus, misalnya ada yang berbentuk seperti benang yang halus, bercabang banyak, berbentuk gelembung, daun yang lebar, bergerigi pada bagian daun dan bertalus lebar.Penelitian ini bertujuan untuk mengetahui jenis dan mendeskripsikan morfologi Sargassum yang ditemukan di Kepulauan Raja Ampat, Papua Barat. Dari hasil penelitian ditemukan ada 4 spesies di Pulau Yeftip Yefnawam (S. paniculatum, S. grevillei, S. cristaefolium), dan yang ditemukan di Pulau Salawati (S. polycystum).
Seagrass Community At Kampung Ambong’s Water East Likupang Subdistrict, North Minahasa Regency Surabi, Astevi; Kondoy, Khristin I. F.; Manu, Gaspar D.
Jurnal Ilmiah PLATAX Vol 6, No 1 (2018): ISSUE JANUARY-JUNE 2018
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.6.1.2018.17861

Abstract

This Research is done at Kampung Ambong’s Water East Likupang Subdistrict, North Minahasa Regency. The aim of this research is to know the type composition of seagrass and to analyzed soliding, dominatting index, various index, index of spreadness. The data taken with the line transect method. The transect placement divided become 3 transect line that  located it uphold straight of beach line  each of them 95 meter long. Meanwhile the space between one transect to another (second and third) each 100 m.Meanwhile the space between one transect to another (second and third) each 100 m. All of them identified as : Cymodocea rotundata, Syringodium isoetifolium, Halophila decipiens, Halodule pinifolia, Cymodocea serrulata, Enhalus acoroides, Halphila minor,  Thalassia hempricii, Halodule uninervis, Halophila spinulosa. From the soliding each species show the highest score which is Cymodocea rotundata 2608 individu/m2, Syringodium isoetifolium 816 individu/m2, Halophila decipiens 420 individu/m2, Halodule pinifolia 292 individu/m2, Cymodocea serrulata 268 individu/m2, Enhalus acoroides 260 individu/m2, Halophila minor 224 individu/m2, Thalassia hempricii 160 individu/m2, Halodule uninervis 124 individu/m2, Halophila spinulosa 20 individu/m2.Whereas dominatting index be obtained 0.3 be in low category. its mean there is no species that to dominate in that water. Various index be obtained 1.65 be in mid category. it show that species community almost in spread condition, because it has the same opportunity.Index of spreadness be obtained 0.72 be in   high category, because it has a mixing seagrass field.Keywords:  community, composition, seagrass soliding. ABSTRAKPenelitian ini dilakukan di Perairan Kampung Ambong Kecamatan Likupang Timur Kabupaten Minahasa Utara.Tujuan dari penelitian ini mengetahui komposisi jenis lamun dan menganalisis kepadatan, indeks dominasi, indeks keanekaragaman, indeks kemerataan.  Pengambilan data dilakukan dengan metode garis transek.  Penempatan transek di bagi menjadi 3 garis transek yang di letakkan tegak lurus garis pantai dengan panjang masing-masing garis transek 95 meter.  Sedangkan jarak antara transek 1 dengan transek yang lain (2 dan 3) masing-masing 100 m. Dari hasil penelitian komposisi jumlah spesies lamun (seagrass) adalah 10. Kesepuluh spesies yang teridentifikasi yaitu: Cymodocea rotundata, Syringodium isoetifolium, Halophila decipiens, Halodule pinifolia, Cymodocea serrulata, Enhalus acoroides, Halphila minor,  Thalassia hempricii, Halodule uninervis, Halophila spinulosa.Kepadatan masing-masing spesies  diperoleh menunjukkan nilai tertinggi yaitu Cymodocea rotundata 2608 individu/m2, Syringodium isoetifolium 816 individu/m2, Halophila decipiens 420 individu/m2, Halodule pinifolia 292 individu/m2, Cymodocea serrulata 268 individu/m2, Enhalus acoroides 260 individu/m2, Halophila minor 224 individu/m2, Thalassia hempricii 160individu/m2, Halodule uninervis 124individu/m2, Halophila spinulosa 20 individu/m2.  Sedangkan indeks dominasi diperoleh 0.3 berada dalam kategori rendah, artinya tidak ada spesies yang mendominasi di perairan tersebut. Indeks keanekaragaman diperoleh 1.65 berada dalam kategori  sedang.  Hal ini menunjukkan bahwa komunitas spesies dalam kondisihampir merata, karena memiliki peluang yang sama. Indeks kemerataan diperoleh 0.72 berada dalam kategori tinggi, karena memiliki padang lamun campuran.Kata kunci : komunitas, komposisi, kepadatan lamun.
Seagrass Thalassia hemprichii Biomass in Waleo Waters, Kema District, Minahasa Utara Regency Alelo, Meske Leny; Kondoy, Khristin I. F.; Moningkey, Ruddy D.
Jurnal Ilmiah PLATAX Vol 6, No 1 (2018): ISSUE JANUARY-JUNE 2018
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.6.1.2018.19544

Abstract

This study was aimed at knowing the aquati environmental condition, the fresh weight and ry weight of root, rhizome, and leaf of  Thalassia hemprichii, and the ratio of seagrass biomass of Thalassia hemprichii with sampling sites.It was done in Waleo waters, Kema district, Minahasa Utara regency. Data collection used 50×50 cm quadrat, and each T. hemprichii in the quadrat was removed.  Water temperature and salinity were measured. Each study site was photographed.This study was done at the lowest tide in 3 locations, near mangrove forest, in the seagrass bed, and coral reefs. Seagrass samples were put in separated plastic bags with location, placed in the cool box, ans brought to the laboratory for further analysis. The samples were cleansed and put in the alcohol-containing plastic bag. Then, the samples were dried and weighed. Results showed that the highest biomass occurred in root, then leaf, and rhizome for all study sites. Keywords: seagrass, biomass, Thalassia hemprichii. ABSTRAKTujuan Penelitian adapun tujuan penelitian ini yaitu untuk mengetahui kondisi lingkungan perairan di lokasi penelitian, untuk mengetahui berapa besar berat basah dan berat kering dari bagian-bagian (akar, rhizoma, dan daun) dari lamun Thalassia hemprichii, untuk mengetahui perbandingan biomassa dari lamun Thalassia hemprichii berdasarkan masing-masing stasiun pengambilan sampel. Penelitian ini dilaksanakan di Perairan Waleo Kecamatan Kema Minahasa Utara. Pengambilan data menggunakan kuadaran 50×50 cm, dan  setiap lamun Thalassia hemprichii di  dalam kuadran dicabut. Suhu dan salnitas air juga diukur. Lokasi penelitian diambil gambar bawah air. Pengambilan sampel dilakukan pada saat surut terrendah dekat hutan mangrove, di hamparan lamunn dan daerah terumbu karang. Sampel lamun dimasukan ke dalam plastik di pisahkan sesuai sub lokasi, sampel di masukan kedalam cool box dan di bawah ke laboratorium untuk di teliti. Lamun dicuci bersih menggunakan air bersih dan diisi dalam plastik sampel dengan memakai alkohol. Lamun di bawah ke laboratorium akan di keringkan dan ditimbang. Hasil biomassa lamun Thalassia hemprichii di lokasi penelitian menunjukkan bahwa biomassa tertinggi terdapat pada akar, kemudian daun, dan batang.Kata Kunci : Lamun, Biomassa, Thalassia hemprichii.  
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
Morphometric study of seagrass Thalassia hemprichii in the coastal area of the Bahoi Village, West Likupang Sub-distritct, North Minahasa District Yuneke Kansil; Khristin I.F. Kondoy; Joudy R.R. Sangari; Alex D. Kambey; Adnan S. Wantasen; Hermanto Manengkey
JURNAL PERIKANAN DAN KELAUTAN TROPIS Vol. 10 No. 3 (2021)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.204 KB) | DOI: 10.35800/jpkt.10.3.2019.27490

Abstract

The purposes of the morphometrics of seagrass Thalassia hemprichii study (based on samples taken from the coast of Bahoi Village, Likupang Barat Sub-district, North MInahasa District) were as follow: (1) to know the environmental conditions (temperature, salinity, pH, substrate) on the coastal area of Bahoi Village, (2) to describe the morphometrics of seagrass T. hemprichii,  and (3) to compare the morphometric of seagrass Thalassia hemprichii based on sampling stations. Data were collected using a survey method, to sample the seagrass T. hemprichii in three locations. As many as 30 individuals at each study location, were then measured using a digital caliper. The results of the measurement analyzed statistically show that the value was not significantly different. There is no significant difference in the size of the seagrass growth due to environmental conditions or environmental parameters that exist at these 3 stations and supposedly are still within the safe limits for seagrass growth. This evidence was gained based on the results of the ANOVA test (one way ANOVA) which was not significantly different.Keyword : Morphometrics; Thalassia hemprichii; Seagrass; Bahoi Village; Coast ABSTRAKTujuan Penelitian ini adalah mengetahui morfometrik Lamun Thalassia hemprichii berdasarkan sampel yang diambil di Pesisir Pantai Desa Bahoi Kecamatan Likupang Barat. yaitu : (1) Mengetahui kondisi lingkungan perairan lamun (suhu, salinitas, pH, substrat) di Pesisir Pantai Desa Bahoi, (2) Mendeskripsikan morfometrik dari lamun Thalassia hemprichii, (3) Membandingkan morfometrik lamun Thalassia hemprichii berdasarkan stasiun pengambilan sampel. Pengambilan data dilakukan dengan menggunakaan metode survei jelajah, dengan menggunakan Global Positioning System (GPS) dan dilanjutkan dengan pengambilan sampel Lamun Thalassia hemprichii sebanyak 30 individu pada setiap lokasi penelitian,   kemudian  diukur dengan menggunakan caliper digital. Hasil yang analisis diperoleh berdasarkan nilai statistik Thalassia hemprichii di Pesisr Pantai Desa Bahoi adalah tidak berbeda nyata. Tidak adanya perbedaan yang nyata dari ukuran pertumbuhan  lamun tersebut  disebabkan oleh kondisi lingkungan atau parameter lingkungan yang ada  pada ke 3 stasiun ini masih dalam batas yang aman bagi pertumbuhan Lamun. Dibuktikan dengan Hasil uji ANOVA satu jalur (one way ANOVA) diperoleh tidak berbeda nyata.Kata kunci : Morfometrik; Thalassia hemprichii; Lamun; Desa Bahoi; Pesisir
STATUS DAN KONDISI PADANG LAMUN DI PERAIRAN PULAU PANIKI DESA KULU KECAMATAN WORI KABUPATEN MINAHASA UTARA Arsida N.A. Kamaludin; Billy Th. Wagey; Calvyn F.A. Sondak; Esther D. Angkouw; Nickson J. Kawung; Khristin I.F. Kondoy
JURNAL PESISIR DAN LAUT TROPIS Vol. 10 No. 3 (2022): JURNAL PESISiR DAN LAUT TROPIS
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jplt.10.3.2022.55014

Abstract

Seagrass beds are a very important coastal aquatic ecosystem because they provide great benefits both ecologically in their environment and economically for human life. This study aims to determine the species of seagrass and find out the condition of seagrass beds in the waters of Paniki Island. The method used in this study is the quadratic transect method (perpendicular to the coastline) which is modified from the COREMAP-CTI Seagrass Field Monitoring. The results of the study found 5 species of seagrasses that were identified, namely Thalassia hemprichii, Cymodocea rotundata, Enhalus acoroides, Halodule pinifolia and Halophila ovalis. Thalassia hemprichii has the highest average seagrass closure per species of 23.70% and the lowest average seagrass closure per species which is Halophila ovalis 0.91%. The condition of seagrass beds in the waters of Paniki Island is classified as a category of less rich / unhealthy conditions with a seagrass closing value of 56.24% and is included in the category of dense seagrass cover with a closing value of 51-75%. Keyword: Seagrass Conditions, Cover, Seagrass bed, Paniki Island ABSTRAK Padang lamun merupakan suatu ekosistem perairan wilayah pesisir yang sangat penting karena memberikan manfaat besar baik secara ekologi di lingkungannya dan secara ekonomis bagi kehidupan manusia. Penelitian ini bertujuan untuk mengetahui jenis-jenis lamun dan mengetahui kondisi padang lamun di Perairan Pulau Paniki. Metode yang digunakan dalam penelitian ini adalah metode transek kuadrat (tegak lurus garis pantai) yang dimodifikasi dari Monitoring Padang Lamun COREMAP-CTI. Hasil penelitian ditemukan 5 jenis lamun yang teridentifikasi yaitu Thalassia hemprichii, Cymodocea rotundata, Enhalus acoroides, Halodule pinifolia dan Halophila ovalis. Thalassia hemprichii memiliki rata-rata penutupan lamun per jenis tertinggi yaitu 23,70% dan rata-rata penutupan lamun per jenis terendah yaitu Halophila ovalis 0,91%. Kondisi padang lamun yang terdapat di perairan Pulau Paniki tergolong dalam kategori kondisi kurang kaya/kurang sehat dengan nilai penutupan lamun 56,24% dan termasuk dalam kategori tutupan lamun yang padat dengan nilai penutupan 51-75%. Kata Kunci : Kondisi lamun, Penutupan, Padang lamun, Pulau Paniki
Structure of the Seagrass Community in Meras Beach, Bunaken District, Manado City, North Sulawesi Manurung, Nia Dopa; Kondoy, Khristin; Rondonuwu, Ari B.; Wantasen, Adnan; Mantiri, Rose O. S. E.; Manengkey, Hermanto
Jurnal Ilmiah Platax Vol. 10 No. 1 (2022): ISSUE JANUARY-JUNE 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i1.37826

Abstract

Seagrass is a flowering plant (Angiospermae) that grows and breeds on the bottom of shallow sea waters, from tidal areas (intertidal zone) to sublittoral areas. The role of seagrass in shallow marine waters is as a primary producer, as a habitat for biota, catching sediments, and a nutrient recycler. The existence of seagrass is influenced by several factors, namely: temperature, salinity, depth, brightness, nutrients, and salinity. The purpose of this study was to determine the Relative Density, Relative Abundance, Relative Dominance, Frequency, Relative Frequency, Important Value Index, Diversity Index, and Dominance Index, to determine the types of seagrass and to determine the condition of the aquatic environment. This research uses the quadratic methods and line transect. This research was conducted on May 28, 2021, at Meras Beach, Bunaken District, Manado City, North Sulawesi. The number of stands of seagrass species in the study area ranged from 23-320 individuals, species density (8.36-116.36 individuals/m2), relative density (3.62-50.47%), frequency of presence (0.037- 0.50 ), relative frequency (3.62- 50.47%), dominance index (0.072-1.009), the diversity index (1.236), index of the importance of seagrass in Meras Coastal Waters showed that Cymodocea rotundata had the highest important value index among the 5 seagrass species, namely 151.41%. There are 5 species of seagrass found in Meras Coastal Waters, namely, Enhalus acoroides, Syringodium isoetifolium, Halophila ovalis, Cymodocea rotundata, Thalassia hemprichii. The environmental conditions in Meras Beach are temperature 29°C, salinity 35‰, the brightness is quite clear and has a substrate of sand, muddy, sand mixed with mud, muddy mixed with sand, and coral fragments.Keywords: Meras Beach; Seagrass; Community Structure.AbstrakLamun (seagrass) adalah tumbuhan berbunga (Angiospermae) yang tumbuh dan berkembang biak pada dasar perairan laut dangkal, mulai daerah pasang surut (zona intertidal) sampai dengan daerah sublitoral. Peranan lamun di lingkungan perairan laut dangkal sebagai produsen primer, sebagai habitat biota, penangkapan sedimen dan sebagai pendaur zat hara. Keberadaan lamun dipengaruhi oleh beberapa faktor yaitu: suhu, salinitas, kedalaman, kecerahan, nutrient dan salinitas. Tujuan penelitian ini adalah untuk mengetahui Kepadatan Relatif, Kelimpahan Relatif, Dominasi Relatif, frekuensi, Frekuensi Relatif, Indeks Nilai Penting, Indeks Keanekaragaman, dan Indeks Dominasi, untuk mengetahui jenis-jenis lamun dan untuk mengetahui bagaimana kondisi lingkungan perairan. Adapun penelitian ini menggunakan metode kuadrat dan line transek. Penelitian ini dilaksanakan pada tanggal 28 Mei 2021, dilakukan di Pantai Meras, Kecamatan Bunaken, Kota Manado, Sulawesi Utara. Jumlah tegakan spesies lamun di lokasi penelitian berkisar dari 23-320 individu, kepadatan spesies (8,36-116,36 individu/m2), kepadatan relatif (3,62- 50,47%), frekuensi kehadiran (0,037- 0,50) , frekuensi relatif (3,62- 50,47%), indeks dominasi (0,072-1,009), indeks keanekaragaman (1,236), indeks nilai penting lamun di Perairan Pantai Meras menunjukkan bahwa Cymodocea rotundata memiliki indeks nilai penting paling tinggi diantara ke 5 spesies lamun yakni 151, 41 %). Spesies lamun yang ditemukan di Perairan Pantai Meras berjumlah 5 yaitu, Enhalus acoroides, Syringodium isoetifolium, Halophila ovalis, Cymodocea rotundata, Thalassia hemprichii. Kondisi lingkungan di Perairan Pantai Meras yakni suhu 29°C, salinitas 35‰, kecerahan cukup jernih dan memiliki substrat pasir, berlumpur, pasir bercampur lumpur, berlumpur campur pasir dan pecahan karang. Kata kunci: Pantai Meras; Lamun; Struktur Komunitas.
Benefit Value of Mangrove Forest in Sarawet Village, Likupang Timur, Minahasa Utara Tamsir, Chika Litawaty; Lasabuda, Ridwan; Wantasen, Adnan S.; Kondoy, Khristin I. F.; Kambey, Alex D.; Sondak, Calvyn
Jurnal Ilmiah Platax Vol. 10 No. 2 (2022): ISSUE JULY-DECEMBER 2022
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v10i2.41499

Abstract

The purpose of this study is to: 1) identify various types of direct and indirect benefits of mangrove forests, and 2) estimate the total economic value of the mangrove forest in Sarawet Village. This type of research is descriptive and quantitative using survey methods. Data analysis in this study uses descriptive and quantitative analysis. Descriptive analysis is used to explain the activities of utilizing natural resources of mangrove ecosystems, while quantitative analysis is used to calculate the total economic value of mangrove ecosystems. The selection of respondents used the purposive sampling method, with a total of 76 respondents. Analysis of the total economic value for the value of direct benefits using market prices, and the value of indirect benefits using replacement costs. The results showed that the people of Sarawet Village use the mangrove forest ecosystem directly in the form of mangrove wood used as firewood and fence stakes, leaves Nipah are made with roofs, and the community carries out fishing and crab activities around mangrove waters.Analysis of the total economic value of the mangrove forest in Sarawet Village amounted to Rp. 6.884.344.178,-/year. The total economic value is obtained from the value of direct benefits including utilization as firewood Rp. 4,160,000,- /year; fence pegs Rp. 87.500,-/year; roof of the house Rp. 330.000,-/year; fishing Rp. 769.174.000,-/year; crab fishing is Rp. 190.320.000,-/year, and the value of indirect benefits is as a barrier to abrasion and seawater waves Rp. 5.920.272.678,-/year. The large economic value of the total mangrove forest ecosystem in Sarawet Village shows that the mangrove ecosystem provides great benefits to the community.Keywords: direct benefit value, indirect benefit value, total economic value, MangroveAbstrakThe purpose of this study is to: 1) identify various types of direct and indirect benefits of mangrove forests, and 2) estimate the total economic value of the mangrove forest in Sarawet Village. This type of research is descriptive and quantitative using survey methods. Data analysis in this study uses descriptive and quantitative analysis. Descriptive analysis is used to explain the activities of utilizing natural resources of mangrove ecosystems, while quantitative analysis is used to calculate the total economic value of mangrove ecosystems. The selection of respondents used the purposive sampling method, with a total of 76 respondents. Analysis of the total economic value for the value of direct benefits using market prices, and the value of indirect benefits using replacement costs. The results showed that the people of Sarawet Village use the mangrove forest ecosystem directly in the form of mangrove wood used as firewood and fence stakes, leaves Nipah are made with roofs, and the community carries out fishing and crab activities around mangrove waters.Analysis of the total economic value of the mangrove forest in Sarawet Village amounted to Rp. 6.884.344.178,-/year. The total economic value is obtained from the value of direct benefits including utilization as firewood Rp. 4,160,000,- /year; fence pegs Rp. 87.500,-/year; roof of the house Rp. 330.000,-/year; fishing Rp. 769.174.000,-/year; crab fishing is Rp. 190.320.000,-/year, and the value of indirect benefits is as a barrier to abrasion and seawater waves Rp. 5.920.272.678,-/year. The large economic value of the total mangrove forest ecosystem in Sarawet Village shows that the mangrove ecosystem provides great benefits to the community.Keywords: direct benefit value, indirect benefit value, total economic value, Mangrove.
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
Co-Authors Adnan S. Wantasen Adnan Wantasen Alelo, Meske Leny Alex D. Kambey Ari B. Rondonuwu Arsida N.A. Kamaludin Billy Th. Wagey Billy Theodorus Wagey Calvyn F. A. Sondak, Calvyn F. A. Deiske Adeliene Sumilat, Deiske Adeliene Esther D. Angkouw Frans Lumoindong, Frans Gaspar D. Manu, Gaspar D. Grevo S Gerung Hermanto Manengkey Indri Manembu Joudy R.R. Sangari Kepel, Rene Ch. Lawrence J.L. Lumingas, Lawrence J.L. Lumingas, Lawrens .J. L . Mandagi, Stephanus V. Manengkey, Hermanto Mantiri, Rose. O.S.E Manurung, Nia Dopa Medy Ompi Menajang, Febry S. I. Moningkey, Ruddy D. Namoua, Dilivia J. Nego E. Bataragoa, Nego E. Nickson J. Kawung Pansing, Jenita Patra, Frian Pelle, Wilmy Rangan, Jety Rangan, Jety K. Ridwan Lasabuda Rose O. S. E. Mantiri, Rose O. S. E. Sangari, Joudy R. R. Surabi, Astevi Suzanne L Undap Tampanguma, Biondi Tamsir, Chika Litawaty Tualangi, Jehezkiel Timotius Umasangadji, Muhammad Hasril Wakkary, Paramitha G. Yuneke Kansil