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All Journal Journal of Marine and Aquatic Sciences BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Segara INTERNATIONAL JOURNAL OF ENVIRONMENT AND GEOSCIENCES
Ni Luh Gede Rai Ayu Saraswati
Mahasiswa Program Studi Manajemen Sumberdaya Perairan, Fakultas Kelautan Dan Perikanan, Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Immunology & microbiology Materials Science & Nanotechnology Veterinary

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Analisis Kualitas Perairan Pada Wilayah Perairan Pulau Serangan Bagian Utara Berdasarkan Baku Mutu Air Laut Ni Luh Gede Rai Ayu Saraswati; I Wayan Arthana; I Gede Hendrawan
Journal of Marine and Aquatic Sciences Vol 3 No 2 (2017)
Publisher : Fakultas Kelautan dan Perikanan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (970.224 KB) | DOI: 10.24843/jmas.2017.v3.i02.163-170

Abstract

Water quality monitoring is one of important activity, especially in coastal water, which susceptive with pollution. Water area of Serangan Island is a tidal flat area, influenced by fresh water and sea water inputs. The existence activities, such as cage aquaculture and tourism, and input from river, are threatened to decrease the water quality in north of Serangan water. This research was conducted to the condition of water quality based on water quality standard for aquatic organisms and its spatial distribution. The parameters measured were temperature, salinity, pH, DO, turbidity, and BOD5, in 8 sample points. Some parameters measured directly on water surface (temperature, salinity, pH and DO) and the others were analyzed in laboratory (turbidity, and BOD5). BOD5 was analyzed by standard method of Delzer & McKenzie. Based on research, the result of temperature values ranged from 28,9°C-30,5°C; salinity 29,6 ppt-32,7 ppt; pH 7,7-7,9; DO 3 mg/L-4,4 mg/L; turbidity 1,9 ntu-7,6 ntu; and BOD5 2,8 mg/L-5,4 mg/L. The water quality in Serangan had a different spatial distribution in each parameters. Overall, based on research result, the water quality condition in the body water of Serangan island was good and suitable to support aquatic organisms living.
WATER POLLUTION LEVELS IN THE SUWUNG ESTUARY, BALI, BASED ON BIOLOGICAL OXYGEN DEMAND Ni Luh Gede Rai Ayu Saraswati; I Wayan Arthana; I Gede Surya Risuana; I Gede Hendrawan
BIOTROPIA - The Southeast Asian Journal of Tropical Biology Vol. 25 No. 3 (2018)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2018.25.3.1001

Abstract

Biological Oxygen Demand (BOD) is generally used for determining water pollution levels in bodies of water. Estuary is a semi-enclosed body of water that can be polluted via land areas or rivers. This study was conducted to determine the spatial distribution of water pollution levels in the Suwung Estuary in Bali based on BOD5 analyses conducted in January and February 2016. Samples were taken in 20 points (19 points in the Suwung Estuary and 1 outside the Suwung Estuary as control). BOD5 samples were then analysed in the laboratory. Our BOD5 analyses used the amperometric method based on the National Field Manual for the Collection of Data Water-Quality, Chapter A7. BOD5 samples were taken at all tide cycles, during low to high tide and high to low tide. BOD5 values ranged from 0.84 mg/L–9.47 mg/L during lowto high tide and 0.96 mg/L–8.75 mg/L during high to low tide. Results of the BOD5 analyses showed slight contamination in the Suwung Estuary during both tidal conditions. The BOD5 values’ spatial distribution showed higher values around cage aquacultures, rivers, the Suwung Landfill, and around the Benoa Harbour.
Kajian Kualitas Air Untuk Wisata Bahari Di Pesisir Kecamatan Moyo Hilir Dan Kecamatan Lape, Kabupaten Sumbawa Ni Luh Gede Rai Ayu Saraswati; Yulius -; Agustin Rustam; Hadiwijaya L. Salim; Aida Heriati; Eva Mustikasari
Jurnal Segara Vol 13, No 1 (2017): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1663.752 KB) | DOI: 10.15578/segara.v13i1.6421

Abstract

Perairan teluk Saleh memiliki keanekaragaman hayati laut yang berpotensi sebagai obyek wisata bahari. Keberadaan keanekaragaman hayati laut tersebut tidak terlepas dari kondisi kualitas perairan sebagai penunjang kehidupan organisme akuatik sebagai obyek dari wisata bahari. Oleh karena itu, penelitian terhadap analisis kualitas air untuk wisata bahari di teluk Saleh diperlukan. Penelitian ini dilakukan pada 8-10 Mei 2015 di teluk Saleh, Kabupaten Sumbawa dengan mengambil sebanyak 29 lokasi stasiun pengamatan. Pengambilan data kualitas perairan dilakukan secara purposive sampling dengan menggunakan alat multiparameter WQC-24. Parameter yang diukur diantaranya adalah kecepatan arus, kecerahan, kekeruhan, suhu, pH, salinitas dan DO. Analisis data dilakukan secara deskriptif dan menggunakan analisa PCA (Principal Component Analysis). Hasil pengukuran menunjukan bahwa nilai kekeruhan (pada stasiun 25 dan 50), fosfat dan nitrat melebihi baku mutu Kepmenneg LH no 51 tahun 2004 Lampiran II dengan nilai rata-rata berturut-turut 20,5 NTU; 0,074 mg/L; dan 8,4 mg/L. Secara keseluruhan perairan teluk Saleh tergolong baik dan cocok sebagai kawasan wisata bahari. Berdasarkan analisis PCA diperoleh parameter yang berperan kuat di lokasi adalah konduktivitas, salinitas, suhu, kecepatan arus dan kekeruhan.
Microplastics Abundance and Characteristics in Mytilus spp. from Southwest Western Australia Urban Estuaries Ni Luh Gede Rai Ayu Saraswati; Harriet Paterson; Renae Hovey
International Journal of Environment and Geosciences Vol 4 No 1 (2022)
Publisher : Graduate Study of Environmental Sciences, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

As global plastic production continuously increases, plastic waste is no doubt becoming an emerging threat to aquatic ecosystems. This condition has directly linked to the abundance of microplastics in the aquatic system, especially in the semi-enclosed system of estuary. This study aims to investigate the microplastics abundance and characteristics in sedentary filter feeder of Mytilus spp. inhabited urban estuaries of southwest Western Australia. Microplastics were detected in 69% of total individual sampled. The mean of microplastics was 1.31±1.26 items per invidual and 0.27±0.45 Items per mussels wet weight (gww). The most common microplastics types from all samples was films (51%), then followed by fibers (43%). Our results highlight that microplastics contamination is widespread across the Western Australia estuaries and has contaminated the sedentary organisms lived in the estuary, including Mytilus spp. This study was a pilot study and is considered to be the first study in Western Australia among similar studies on microplastics in mussels. A further study in developing standard methods and expanding the study area and sample size is important to be conducted. This will give more confirmation on using mussels (Mytilus spp.) for global microplastics biomonitoring. Keywords: Microplastics; Mussel; Mytilus spp.; Urban Estuary; Southwest Western Australia
Co-Authors Agustin Rustam Aida Heriati Eva Mustikasari Hadiwijaya L. Salim Harriet Paterson I Gede Hendrawan I Gede Surya Risuana I Wayan Arthana Renae Hovey Yulius -