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All Journal HUMANITIS : Jurnal Humaniora, Sosial dan Bisnis Metamorfosa: Journal of Biological Science Open Access DRIVERset
Ni Luh Gede Rai Ayu Saraswati
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Religion Humanities Biochemistry, Genetics & Molecular Biology Education Public Health Social Sciences

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KEANEKARAGAMAN JENIS DAN KONDISI EKOSISTEM PADANG LAMUN PANTAI GEGER, NUSA DUA, BALI Windy Naibaho; I Wayan Arthana; Ni Luh Gede Rai Ayu Saraswati
HUMANITIS: Jurnal Homaniora, Sosial dan Bisnis Vol. 3 No. 2 (2025): AGUSTUS
Publisher : ADISAM PUBLISHER

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Abstract

This study aims to analyze the species diversity, density, coverage, and environmental conditions of seagrass beds at Geger Beach, Nusa Dua, Bali. The method used is quantitative descriptive, with field data collection through line transects and quadrats, as well as analysis of physical, chemical, and biological parameters. The results show the presence of six dominant seagrass species, namely Cymodocea rotundata, Thalassia hemprichii, Syringodium isoetifolium, Halophila ovalis, Halodule uninervis, and Halodule pinifolia. The highest density values were found in Cymodocea rotundata and Syringodium isoetifolium, with a total density reaching 1,119 stands/m². The average seagrass coverage was 39.83%, classified as moderate but still considered to be in an unhealthy condition. The diversity index was in the moderate category (1.37–1.45), evenness was high (0.76–0.81), and dominance ranged from low to moderate (0.25–0.31). Water quality parameters such as temperature, pH, dissolved oxygen, salinity, and turbidity were still within the range that supports seagrass growth. In addition, five types of associated fauna (megabenthos) were found coexisting with the seagrass. This study emphasizes the importance of conserving seagrass beds as productive habitats and living spaces for various marine species.
Profil Pencemaran Mikroplastik Pada Sedimen Ekosistem Mangrove di Pulau Serangan, Bali Made Bayu Khrisna Pramana; Nyoman Dati Pertami; Ni Luh Gede Rai Ayu Saraswati
Metamorfosa: Journal of Biological Sciences Vol. 12 No. 1 (2025)
Publisher : Program Magister Ilmu Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2025.v12.i01.p1

Abstract

Microplastics are defined as small particles plastic with less than 5 mm in size. These small plastic particles were polluted all environments compartments, including mangrove ecosystem. This study aims to investigate microplastics pollution in mangrove sediment in Serangan waters, Bali. Moreover, sediment sample were collected in different sediment depth (0-10 cm, 10-20 cm and 20-30 cm) to understand the vertical abundance and morphology of microplastics in mangrove sediment. Sampling points were also distributed across mangrove ecosystem of Serangan Island with different characteristics, including near road and landfill station (St 1), residential area and small bussineses (St 2 and 3), and near bay area with less anthropogenic influence (St 4). A total of 182 suspected microplastic particles were identified from all sediment sample. The average of microplastics abundance vertically was ranging from 0.025±0.015 to 0.026±0.014 particle/g, while the average abundance horizontally was from 0.021±0.010 to 0.036±0.015 particle/g. Fragment was the most common microplastics types identified (76.37%), followed by fiber (15.38%) and film (8.24%). Our result highlight that microplastics has polluted the sediment layers of mangrove ecosystem in Serangan oWaters. The source of suspected microplastics particle in the sampling area was suggested from both land (through river pathway) and ocean (due to oceanographic factors, such as tides, wind and current). A further study on determining the polymer of suspected microplastics particle is needed. This is important to confirm the validity of visual identification in this study. Keyword: Microplastics, Mangrove ecosystem, Mangrove sediment, Serangan Island
Profil Pencemaran Mikroplastik Pada Sedimen Ekosistem Mangrove di Pulau Serangan, Bali Made Bayu Khrisna Pramana; Nyoman Dati Pertami; Ni Luh Gede Rai Ayu Saraswati
Metamorfosa: Journal of Biological Sciences Vol. 12 No. 1 (2025)
Publisher : Program Magister Ilmu Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2025.v12.i01.p1

Abstract

Microplastics are defined as small particles plastic with less than 5 mm in size. These small plastic particles were polluted all environments compartments, including mangrove ecosystem. This study aims to investigate microplastics pollution in mangrove sediment in Serangan waters, Bali. Moreover, sediment sample were collected in different sediment depth (0-10 cm, 10-20 cm and 20-30 cm) to understand the vertical abundance and morphology of microplastics in mangrove sediment. Sampling points were also distributed across mangrove ecosystem of Serangan Island with different characteristics, including near road and landfill station (St 1), residential area and small bussineses (St 2 and 3), and near bay area with less anthropogenic influence (St 4). A total of 182 suspected microplastic particles were identified from all sediment sample. The average of microplastics abundance vertically was ranging from 0.025±0.015 to 0.026±0.014 particle/g, while the average abundance horizontally was from 0.021±0.010 to 0.036±0.015 particle/g. Fragment was the most common microplastics types identified (76.37%), followed by fiber (15.38%) and film (8.24%). Our result highlight that microplastics has polluted the sediment layers of mangrove ecosystem in Serangan oWaters. The source of suspected microplastics particle in the sampling area was suggested from both land (through river pathway) and ocean (due to oceanographic factors, such as tides, wind and current). A further study on determining the polymer of suspected microplastics particle is needed. This is important to confirm the validity of visual identification in this study. Keyword: Microplastics, Mangrove ecosystem, Mangrove sediment, Serangan Island
Co-Authors I Wayan Arthana Made Bayu Khrisna Pramana Nyoman Dati Pertami Windy Naibaho