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All Journal Eduvest - Journal of Universal Studies Jurnal Inovasi Global
Korwa, Feldy Febrian
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Aerospace Engineering Astronomy Computer Science & IT Education Engineering Health Professions Languange, Linguistic, Communication & Media Mathematics Neuroscience Public Health Social Sciences

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Analysis of Substrate Characteristics of Seagrass Habitat in Doreri Bay Manokwari District Korwa, Feldy Febrian; Y.S Purba, Gandi
Eduvest - Journal of Universal Studies Vol. 5 No. 5 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i5.50188

Abstract

This study investigates the characteristics of substrates in seagrass habitats within Doreri Bay, Manokwari District, and their relationship with seagrass species composition. The research aims to assess the type, density, and percentage of seagrass cover, alongside the substrate characteristics in the region. Data were collected between March and May 2020 using the line transect method, while water quality data were gathered in situ. The study found seven seagrass species in Doreri Bay, with densities ranging from 1058 ind/m² to 1457 ind/m² and a cover percentage between 17% and 30%. Substrate types included calcareous, gravel, sands, and silt, each influencing the distribution of seagrass species. Principal Component Analysis (PCA) revealed correlations between specific seagrass species and substrate types: Cymodocea rotundata and Halodule pinifolia correlated with silt, while Thalassia hemprichii was associated with fine sand substrates. The results indicate that substrate characteristics play a significant role in seagrass distribution and biodiversity in Doreri Bay. The study's findings have important implications for the region's management and conservation of seagrass ecosystems, suggesting that targeted efforts to protect specific substrate types can support seagrass health.
Pemetaan Sebaran Stok Karbon pada Padang Lamun di Teluk Doreri Kabupaten Manokwari Wakum, Margaretha M. Yohana; Korwa, Feldy Febrian
Jurnal Inovasi Global Vol. 3 No. 6 (2025): Jurnal Inovasi Global
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jig.v3i6.362

Abstract

Penelitian ini bertujuan untuk memetakan sebaran stok karbon pada padang lamun di tiga lokasi berbeda di Teluk Doreri, Kabupaten Manokwari, yaitu Pantai BLK, Pulau Lemon, dan Tanjung Manggewa. Ekosistem lamun berperan penting sebagai penyerap karbon biru (blue carbon), yang menyimpan karbon baik di atas maupun di bawah substrat. Metode yang digunakan dalam penelitian ini meliputi survei langsung, analisis biomassa lamun menggunakan metode Loss on Ignition, serta pemetaan spasial dengan perangkat lunak ArcGIS. Hasil penelitian menunjukkan terdapat tujuh jenis lamun, dengan Cymodocea rotundata dan Thalassia hemprichii sebagai spesies dominan. Stok karbon tertinggi tercatat di Pulau Lemon sebesar 0,61 metrik ton, sementara terendah di Tanjung Manggewa sebesar 0,14 metrik ton. Temuan ini menunjukkan bahwa aktivitas antropogenik yang rendah berdampak positif terhadap kapasitas penyimpanan karbon pada ekosistem lamun. Data ini diharapkan menjadi acuan dalam pengelolaan ekosistem pesisir berbasis konservasi dan mitigasi perubahan iklim.
Co-Authors Purba, Gandi YS Wakum, Margaretha M. Yohana