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All Journal Jurnal Teknologi Perikanan dan Kelautan BULETIN OSEANOGRAFI MARINA Journal of Marine Research IJOG : Indonesian Journal on Geoscience Jurnal Kelautan Tropis Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) BULLETIN OF THE MARINE GEOLOGY Teknologi Indonesia

Sri Yudawati Cahyarini

Geotechnology Research Centre, Indonesian Institute of Sciences Kompleks LIPI, Jl. Sangkuriang, Bandung 40135, Indonesia

Author-ID : 245486

Agriculture, Biological Sciences & Forestry Computer Science & IT Earth & Planetary Sciences Education Energy Engineering Environmental Science Library & Information Science

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Articles

Seasonal variation of Î´13C content in Porites coral from Simeulue Island waters for the period of 1993-2007 Cahyarini, Sri Yudawati
Indonesian Journal on Geoscience Vol 1, No 2 (2014)
Publisher : Geological Agency

DOI: 10.17014/ijog.v1i2.179Variation of Î´13C content in coral skeletons shows the influence of metabolic fractionation in aragonite coral. Understanding coral Î´13C variation can thus be useful to more understand e.g. past bleaching event which is further useful for coral health and conservation. In this study, Î´13C content in Porites coral from Labuhan Bajau, Simeulue Islands was analyzed. To know the correlation between variation of coral Î´13C and light intensity, the monthly variation of coral Î´13C is compared to solar radiation and cloud cover. The result shows that for the period of 2003 to 2008, coral Î´13C shows it is well correlated (r=0.42 p=0.153) with cloud cover variation in annual mean scale. Meanwhile, in seasonal mean variation, coral Î´13C is strongly influenced (r=0.85 p<0.0001) by cloud cover with 1 - 2 month time lag. Comparing to the solar radiation (cloud cover), SST influences dominantly the variation of coral Î´13C from southern Simeulue Island waters (LB sample) in an annual mean scale than in a seasonal scale.Â

Sea Surface Temperature Reconstruction Period 1993 - 2007 Based on Content Analysis of Coral Sr/Ca from the Region Labuan Bajo, Simeulue Island Cahyarini, Sri Yudawati
Indonesian Journal on Geoscience Vol 6, No 3 (2011)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v6i3.121Sea surface temperature (SST) is one of the important parameters for (paleo) climate studies. The long time series of SST data are required to understand more the climate change. Coral geochemical proxy such as Sr/Ca overcomes this problem. Coral can provide long time series of climate data continuously from present till hundreds years ago, even fossil (dead) coral can do it till thousand years ago. In this study, Sr/Ca content of Porites coral within 10 m deep from Labuan Bajo, Simeulue Island was analyzed to reconstruct SST. Coral Sr/Ca shows a strong correlation with local SST in seasonal scale as well as in the annual mean scale. Reconstructed SST data show that the monsoon between 1993 2007 strongly influence the SST variation in the Simeulue region. It supposed that the seasonal variation signal strongly influence local SST than the annual mean signal such as El Nino.

Seasonal Mean Variability of Coral-based Sea Surface Salinity from Simeulue, Mentawai, Bunaken, and Bali Cahyarini, Sri Yudawati
Indonesian Journal on Geoscience Vol 8, No 3 (2013)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v8i3.161Sea surface salinity is an important parameter in a climate study. Coral Î´18O records Î´18O seawater and sea surface temperature (SST). While, coral Sr/Ca records SST only commonly used in a paleoclimate study to reconstruct SST. Thus, paired coral Î´18O and Sr/Ca can be used to reconstruct Î´18O seawater. Î´18O seawater and SSS is linearly correlated, thus reconstructed Î´18O seawater further is used to reconstruct sea surface salinity (SSS). Instead of using coral Sr/Ca as SST recorder, paired model (grid) or measured SST data is used to reconstruct SSS. In this study, paired coral Î´18O and grid SST data are presented to reconstruct SSS from several different locations across Indonesian sea i.e Simeulue, Mentawai, Bunaken, and Bali. Coral-based SSS reconstructions from those locations are then compared to the grid SSS in the seasonal mean scale. The result shows that annual mean variation of salinity for period of 1958-2008 in Mentawai and Simeulue is 33.25 psu and 33.26 psu respectively, while in Bunaken and Bali is 34.03 psu and 33.47 psu respectively. Correlation coefficient between coral salinity and salinity from model data in the seasonal/monthly mean scale is high i.e R = 0.62 - 0.83. Based on the monthly mean data, corals in the studied area strongly record SSS variation in the monthly or seasonal mean scale. In Mentawai and Simeulue waters, SSS variation is influenced strongly by monsoon. While, in addition to the monsoon, ocean advection also affects seasonal variability of SSS in the Bunaken and Bali waters.

REKONSTRUKSI VARIASI BULANAN SALINITAS DI JALUR ARUS LINTAS INDONESIA SELAMA ~ 200 TAHUN: REKAMAN SALINITAS DARI δ18О KARANG BUNAKEN DAN BALI Hernawan, Indra; Cahyarini, Sri Yudawati; Putri, Mutiara
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 3 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (490.572 KB)

Salinity is one of important parameter in oceanographic studies. The long timeseries oceanographic data is required to more understand the variability of oceanographic condition. Coral geochemical proxies overcome the shortcoming of instrumental data availibility. δ18О contents in coral skeleton is influenced by sea surface temperature and δ18О seawater. δ18О seawater is influenced by salinity. In this study salinity is reconstructed using coral δ18О and SST from the data model. δ18О from Bunaken and Padang Bai (Bali) corals are used in this study. SST data from the ERSST, SODA and HAMSON are used to reconstruct salinity. This study result in that the Bunaken coral records the local salinity variation in monthly and annual mean resolution. Padang Bai coral records better salinity in annual mean variation than in monthly variation. In both region, salinity variation in decadal resolution does not show significantly different.Keywords: Salinity, Sea surface temperature, δ18О, coral, Bunaken and Bali.

VARIASI SUHU MUKA LAUT BULANAN BERDASARKAN KANDUNGAN KIMIA KORAL Cahyarini, Sri Yudawati; Pfeiffer, Miriam; Prayudi, Dudi
Teknologi Indonesia Vol 32, No 2 (2009)
Publisher : LIPI Press

Information on environmental changes which is available today is limited to only dozen years back. In order to make an assesment on environmental changes, information on longer time is required. Corals can provide environmental data till thousand years back. To have some information, it is required to analyze geochemical proxy. By analyzing geochemical elements such as Sr/Ca, ?18O, sea surface temperature and salinity can be reconstructed. Further, by analyzing and interpreting time series data of coral geochemical proxy can be used to understand intensity, process, and mechanism of the environmental damage. In this study, reconstruction of sea surface temperature using Sr/Ca and ?18O coral from Timor is used as a case. The result shows that Sr/Ca is influenced by sea surface temperature.

Analisis Konsentrasi Merkuri (Hg) Pada Sampel Sedimen Di Perairan Pulau Panjang Banten Ramadhan, Rizky Ahmad; Maharani, Ni Made Sri; Ling, Maria Goreti; Fauzan, Ahmad Al; Utami, Dwi Amanda; Sasongko, Agung Setyo; Cahyadi, Ferry Dwi; Cahyarini, Sri Yudawati
Journal of Marine Research Vol 13, No 1 (2024): Journal of Marine Research
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jmr.v13i1.40868

Pulau Panjang terletak di Teluk Banten, Provinsi Banten merupakan pulau kecil yang berdekatan dengan wilayah perkotaan dan industri, antara lain industri pangan, industri minyak dan gas, industri kapal dan industri pembuatan besi. Kehidupan masyarakat di Pulau Panjang sebagian besar memiliki pekerjaan dibidang perikanan. Kegiatan antropogenik berdampak pada kondisi perairan di Pulau Panjang salah satunya pencemaran logam berat yang dapat membahayakan kehidupan disekitar wilayah Pulau Panjang. Merkuri (Hg) merupakan salah satu pencemar yang berbahaya bagi lingkungan laut. Penelitian ini bertujuan untuk mengetahui konsentrasi Hg yang terkandung dalam sampel sedimen pesisir Pulau Panjang dan penyebarannya. Pengambilan sedimen permukaan perairan Pulau Panjang dilakukan bulan Februari 2023. Empat stasiun dan delapan titik penelitian pada setiap stasiun ditentukan menggunakan metode purposive sampling. Logam berat Hg dianalisis dari setiap sampel sedimen menggunakan metode Cold Vapour Atomic Absorption Spectrometry (CVAAS). Data angin bulan Februari 2023 didapatkan dari Instansi Badan Meteorologi Klimatologi dan Geofisika (BMKG) Stasiun Maritim Serang dan sekitarnya. Hasil yang diperoleh dari analisis merkuri memperlihatkan bahwa sedimen perairan Pulau Panjang memiliki konsentrasi Hg rata-rata 285,89 µg/kg, menurut mutu ANZECC & ARMCANZ (2000) nilai tersebut masuk dalam kategori lower. Sumber Hg pada sedimen diduga berasal dari aktivitas manusia yang berada di Pulau Panjang dan penyebarannya dipengaruhi oleh faktor angin dan arus pantai yang menyebabkan konsentrasi Hg berada menjauh dari tepi pantai.Panjang Island is located in Banten Bay, Banten Province, is a small island which is close to urban and industrial areas, including the food industry, oil and gas industry, ship industry and iron making industry. Most of Panjang Island’s people are fisherman. Antrophogenic activities impact on the conditition of the waters in Panjang Island, i.e. heavy metal pollution such as Mercury (Hg) which threathen marine life around the Panjang Island area. Mercury (Hg) is a pollutant that is harmful to marine environment. This study aims to determine the concentration of Hg contained in samples of coastal sediments from Panjang Island and its distribution. Surface sediment collection from the waters of Panjang Island will be carried out in February 2023. Four stations and eight sampling point in each station were determined using a purposive sampling method. Heavy metal Hg content in coastal sediment was analyzed using the Cold Vapor Atomic Absorption Spectrometry (CVAAS) method. Wind data for February 2023 was obtained from the Meteorology, Climatology and Geophysics Agency (BMKG) at Serang Maritime Station for the region surrounding Panjang Islands. The results show that the average Hg concentration in sediments of the Panjang Island Waters is 285. 89 µg/kg, according to the quality of ANZECC & ARMCANZ (2000) this value is included in the lower category. The source of Hg in the sediments is supposed originated from human activities surrounding Panjang Island and its distribution is influenced by wind and coastal currents which cause decreasing Hg concentrations from offshore.

Pengaruh ENSO Dan IOD Terhadap Suhu Permukaan Laut di Perairan Pulau Enggano Amalia, Isra; Lubis, Ashar Muda; Cahyarini, Sri Yudawati
Jurnal Kelautan Tropis Vol 28, No 1 (2025): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v28i1.25759

Enggano Island, located in the Indonesia Ocean, about 178 km away south-west from Bengkulu city, experiences Sea Surface Temperature (SST) variability that may be influenced by global climate phenomena such as the El Niño Southern Oscillation (ENSO) and the Indian Ocean Dipole (IOD). This study aims to analyze the influence of ENSO and IOD on SST surrounding Enggano Island using monthly and annual data during the period 1993-2023. The research was carried out descriptively-analytically including temporal patterns of SPL, seasonal anomalies, and correlations between SPL and the NINO 3.4 index and Dipole Mode Index (DMI). The results showed a significant relationship between ENSO and SPL, where El Niño causes an increasing in SST, while La Niña decreases it with a moderate positive correlation (r = 0.5, p = 0.0042). IOD also affects SST with a weaker positive correlation (r = 0.352, p = 0.0523), where positive phases of IOD could increase SST at the region. Seasonally, the highest SST yearly occurred in March-May and the lowest in June-August. In addition, an increasing SST of 0.5°C can be found over the past 31 years, which may contribute to sea level rise with trend of 4.6-4.7 mm/year, higher than the global average. This research emphasizes the importance of understanding the complex interactions between ENSO, IOD and SPL, which impact oceanographic dynamics and coastal ecosystem management. Pulau Enggano yang terletak di Samudera Indonesia, sekitar 178 km arah barat daya dari kota Bengkulu, mengalami variabilitas Suhu Permukaan Laut (SPL) yang dapat dipengaruhi oleh fenomena iklim global seperti El Nino Southern Oscillation (ENSO) dan Indian Ocean Dipole (IOD). Penelitian ini bertujuan untuk menganalisis pengaruh ENSO dan IOD terhadap SPL di sekitar Pulau Enggano dengan menggunakan data bulanan dan tahunan selama periode 1993-2023. Penelitian dilakukan secara deskriptif-analitik meliputi pola temporal SPL, anomali musiman, dan korelasi antara SPL dengan indeks NINO 3.4 dan Dipole Mode Index (DMI). Hasil penelitian menunjukkan adanya hubungan yang signifikan antara ENSO dan SPL, dimana El Nino menyebabkan peningkatan SST, sedangkan La Nina menurunkannya dengan korelasi positif sedang (r = 0.5, p = 0.0042). IOD juga mempengaruhi SST dengan korelasi positif yang lebih lemah (r = 0.352, p = 0.0523), di mana fase positif IOD dapat meningkatkan SST di wilayah tersebut. Secara musiman, SST tertinggi tahunan terjadi pada bulan Maret-Mei dan terendah pada bulan Juni-Agustus. Selain itu, peningkatan SST sebesar 0,5°C dapat ditemukan selama 31 tahun terakhir, yang dapat berkontribusi pada kenaikan permukaan laut dengan tren 4,6-4,7 mm/tahun, lebih tinggi dari rata-rata global. Penelitian ini menekankan pentingnya memahami interaksi yang kompleks antara ENSO, IOD dan SPL, yang berdampak pada dinamika oseanografi dan pengelolaan ekosistem pesisir.

Kandungan Logam Berat Besi (Fe) pada Sedimen Ekosistem Terumbu Karang di Perairan Pulau Kalih Selatan Banten Nurjanah, Siti; Nazwasyawinka, Keyla; Abrar, Camelia Batun; Nasution, Isra Amalia; Dida, Eki Naidania; Sasongko, Agung Setyo; Widiyanto, Kukuh; Cahyarini, Sri Yudawati
Buletin Oseanografi Marina Vol 14, No 2 (2025): Buletin Oseanografi Marina
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/buloma.v14i2.69313

Pulau Kalih Selatan terletak di sebelah barat laut Teluk Banten yang berdekatan dengan kawasan industri dan daerah penangkapan ikan menggunakan Keramba Jaring Apung (KJA). Pulau ini memiliki keanekaragaman hayati seperti ekosistem mangrove, terumbu karang, dan lamun. Kawasan Industri di sekitar pulau dapat berdampak pada ekosistem perairan salah satunya pencemaran logam berat besi. Penelitian ini bertujuan untuk mengidentifikasi kandungan logam berat besi (Fe) yang terakumulasi pada sedimen di Pulau Kalih Selatan. Sampel sedimen dikumpulkan dari lima stasiun menggunakan metode purposive random sampling. Logam Berat Fe dianalisis di Laboratorium Kimia BRIN KST Samaun Samadikun menggunakan metode Flame Atomic Absorption Spectrophotometer (FAAS). Hasil yang diperoleh dari analisis logam berat Fe menunjukan sedimen di Pulau Kalih Banten memiliki konsentrasi logam berat Fe antara 1.771 mg/kg hingga 41.455 mg/kg, dengan nilai rata-rata 11.144 mg/kg. Kandungan Fe dalam sedimen di hampir seluruh titik lokasi pengambilan sampel berada di bawah baku mutu dari Guidelines for the Protection and Management of Aquatic Sediment Quality in Ontario, hal ini diduga logam berat Fe yang terdapat pada perairan mengalami pengenceran dan sebagian terbawa menuju ke laut lepas yang dipengaruhi gelombang dan arus yang dapat menyebarkan kandungan Fe di semua stasiun nilainya lebih kecil dari baku mutu. South Kalih Island is located in the northwestern part of Banten Bay, adjacent to an industrial area and a fishing area using floating net cages (KJA). The island has biodiversity such as mangroves, coral reefs, and seagrasses. Industrial areas around the island can have an impact on aquatic ecosystems, one of which is heavy metal iron pollution. This study aims to identify the content of heavy metal iron (Fe) accumulated in sediments on South Kalih Island. Sediment samples were collected from five stations using purposive random sampling method. Fe heavy metals were analyzed at the BRIN KST Samaun Samadikun Chemistry Laboratory using the Flame Atomic Absorption Spectrophotometer (FAAS) method. The results obtained from the Fe heavy metal analysis showed that sediments in Kalih Island Banten had Fe heavy metal concentrations between 1,771 mg/kg to 41,455 mg/kg, with an average value of 11,144 mg/kg. The Fe content in sediments at almost all points of the sampling location is below the quality standards of the Guidelines for the Protection and Management of Aquatic Sediment Quality in Ontario, this is thought to be heavy metal Fe contained in the waters undergoes dilution and partially carried to the open sea which is influenced by waves and currents that can spread the Fe content at all stations the value is smaller than the quality standards.

UPWELLING INFLUENCE ON ENVIRONMENTAL CHANGE AND SEDIMENTATION DYNAMICS FROM TRACE FOSSILS IN THE MOLUCCA SEA: IMPLICATIONS FOR SEDIMENT DATING Wiguna, Taufan; Zuraida, Rina; Atmadipoera, Agus Saleh; Yuwono, Fareza Sasongko; Hernawan, Undang; Christanti, Vera; Tournier, Nicolas; Damanik, Adrianus; Vogel, Hendrik; Cahyarini, Sri Yudawati
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 1 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.1.2025.896

Bioturbation, the alteration of sediment layers by organism activities, plays a crucial role in shaping sedimentary environments. This process affects nutrient cycling, sediment stability, and habitat health, particularly in marine ecosystems like the Molucca Sea. Bioturbation can complicate age determination by disrupting the natural layering of sediments and potentially altering chronological records, which challenges the accuracy of dating methods. This study investigates bioturbation patterns and Zr/Rb ratios in sediment cores from the Molucca Sea to better understand past environmental conditions and assess the suitability of these sediments for age determination. Sediment samples were collected using a box corer from BUDEE22-29BC (within the upwelling region) and BUDEE22-57BC (outside the upwelling area). The cores were analyzed using CT scanning to identify bioturbation features, and the Bioturbation Index (BI) was applied to evaluate the intensity and impact of bioturbation on sediment dynamics. The Zr/Rb ratios were determined using an X-ray fluorescence (XRF) spectrometer, providing insights into grain size distribution. The results suggest the potential shifting of the upwelling center (BUDEE22-29BC) and variations in upwelling intensity (BUDEE22-57BC). Although Zr/Rb ratio shows that BUDEE22-29BC is a high-energy environment, as opposed to BUDEE22-57BC, both sites retain chronological integrity, making them suitable for paleoenvironmental and geochronological analysis.

ACCUMULATION OF LEAD AND COPPER IN THE SEDIMENTS IN SOUTH KALIH AND PANJANG ISLAND, BANTEN: AKUMULASI TIMBAL DAN TEMBAGA PADA SEDIMEN DI PERAIRAN PULAU KALIH SELATAN DAN PULAU PANJANG, BANTEN Nazwasyawinka, Keyla; Nurjanah, Siti; Abrar, Camelia Batun; Amalia Nasution, Isra; Dida, Eki Naidania; Sasongko, Agung Setyo; Cahyadi, Ferry Dwi; Cahyarini, Sri Yudawati
Jurnal Teknologi Perikanan dan Kelautan Vol 16 No 4 (2025): NOVEMBER 2025
Publisher : Fakultas Perikanan dan Ilmu Kelautan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24319/jtpk.16.395-405

South Kalih and Panjang Islands are located in Banten Bay, small island with environmental conditions adjacent to the center of industrial activities. Industrial activities near the waters can increase the risk of heavy metal pollution, thereby affecting the quality of the aquatic environment. This study aims to evaluate the condition of aquatic environmental quality based on heavy metal content in sediments. Sediment sampling was conducted at ten observation stations using a purposive random sampling method. Heavy metal analysis was performed using the Flame Atomic Absorption Spectrometry (FAAS). The results indicate that South Kalih Island accumulated more Pb heavy metals with an average of 2.7922 mg kg⁻¹, while the highest accumulation of Cu heavy metals was on Panjang Island with an average of 5.7188 mg kg⁻¹. The accumulation of heavy metals Pb and Cu in the sediments in South Kalih and Panjang Island was below the standard threshold, except at PPS5P1 of Panjang Island, where Cu concentrations exceeded the CCME (2002) quality guideline. Areas with dense anthropogenic activities are more likely to increase the accumulation of heavy metals in the waters.

Co-Authors Abrar, Camelia Batun Agung Setyo Sasongko Agus Atmadipoera Amalia Nasution, Isra Amalia, Isra Ashar Muda Lubis Christanti, Vera Damanik, Adrianus Dida, Eki Naidania Fauzan, Ahmad Al Ferry Dwi Cahyadi Indra Hernawan, Indra Kukuh Widiyanto Ling, Maria Goreti Maharani, Ni Made Sri Mutiara Putri, Mutiara Nasution, Isra Amalia Nazwasyawinka, Keyla Pfeiffer, Miriam Prayudi, Dudi Ramadhan, Rizky Ahmad Rina Zuraida Siti Nurjanah Taufan Wiguna, Taufan Tournier, Nicolas Undang Hernawan, Undang Utami, Dwi Amanda Vogel, Hendrik Yuwono, Fareza Sasongko

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