Karakteristik Fisika dan Kimia Perairan di Laut Jawa – Ambang Dewakang

Hanny Meirinawati, Mochamad Riza Iskandar

Abstract


The Java Sea is a region of important pelagic fish production in Indonesia. The distribution of abundance of fish is affected by changes in water physical and chemical properties. The important chemical property that can affect the abundance of the fish is the availability of nutrients. Nutrients are the basic compounds of marine biogeochemical cycles that play important role in increasing aquatic productivity through growth of the phytoplankton. The purposes of this study are to know recent condition of chemical and physical characteristics of the sea water within the region Java Sea ‒ Ambang Dewakang and to investigate relationships among these parameters. This research was conducted in November 2014 at 7 stations in the region. The observed parameters were physical (temperature, salinity, turbidity, density) and chemical such as nutrients (DIN, PO4-P, SiO3-Si), pH, and DO. CTD (Conductivity-Temperature-Depth) SBE (Sea Bird Electronics) 911 Plus was used to measure water physical properties. Water sample was collected using Rosette sampler, while analysis of nutrients concentration employed methods from Strickland and Parsons 1972. The result showed that temperatures in the Java Sea ranged from 13.06 – 30.33 °C with an average of 25.29 °C, whereas salinity ranged between 33.07 – 34.74 psu with an average of 34.41 psu. Variations within temperature and salinity showed a homogeneous condition due to the influence of mixing processes. Concentration range of DIN (NO3-N+NO2-N+NH4-N), PO4-P, SiO3-Si were from 0.070 to 0.180 mg/L, from 0.004 to 0.022 mg/L and from 0.082 to 0.361 mg/L, with an average of 0.096 mg/L, 0.010 mg/L, and 0.159 mg/L respectively. The ratio DIN/DIP of 13.24 showed that the waters quality of Java Sea was in the moderate category



Keywords


Java sea, nutrient, salinity, pH, and temperature

References


Best, M. A. 2007. Dissolved oxygen as a physico-chemical supporting element in the Water Framework Directive. Marine Pollution Bulletin 55:53–64.

Cardona, Y., A. Bracco, T. A. Villareal, A. Subramaniam, S. C. Weber, and J. P. Montoya. 2016. Highly variable nutrient concentrations in the Northern Gulf of Mexico. Deep Sea Research II 129:20–30.

Chen, C.-T. & A. 2011. Nutrient Cycling in the Oceans. Encyclopedia of Life Support System (EOLSS) 1:13 pp.

Hutagalung, H.P., A. Rozak dan I. Lutan. 1985. Beberapa Catatan Tentang Penentuan Kadar Oksigen dalam Air Laut Menggunakan Metode Winkler. Oseana X (4): 138-149.

Kementerian Lingkungan Hidup Republik Indonesia. 2004. Baku Mutu Air Laut untuk biota laut. Dalam: Keputusan Menteri Negara Lingkungan Hidup No.51 Tahun 2004 Tentang Baku Mutu Air Laut. KLH. Jakarta:32 hal

Koch-Larrouy, A., G. Madec, B. Blanke, and R. Molcard. 2008. Water mass transformation along the Indonesian throughflow in an OGCM. Ocean Dynamics 58 (3): 289-309.

Li, H. M., C. S. Zhang, X. R. Han, and X. Y. Shi. 2015. Changes in concentrations of oxygen, dissolved nitrogen, phosphate, and silicate in the southern Yellow Sea, 1980-2012: Sources and seaward gradients. Estuarine, Coastal and Shelf Science 163:44–55.

Liu, S. M., R. H. Li, G. L. Zhang, D. R. Wang, J. Z. Du, L. S. Herbeck, J. Zhang, and J. L. Ren. 2011. The impact of anthropogenic activities on nutrient dynamics in the tropical Wenchanghe and Wenjiaohe Estuary and Lagoon system in East Hainan, China. Marine Chemistry 125:49–68.

Liu, S. M., J. Zhang, H. T. Chen, and G. S. Zhang. 2005. Factors influencing nutrient dynamics in the eutrophic. Progress in Oceanography 66:66–85.

Merta, I. G. S., B. Iskandar, and S. Bahar. 2004. Musim Penangkapan Ikan di Indonesia, 2nd edition. Balai Riset Perikanan laut, BRKP DKP, Jakarta.

Millero, F. J., and M. L. Sohn. 1992. Chemical oceanography. p. CRC Press Inc. Boca Ruton. Ann Arbor. USA.

Najid, A., J. I. Pariwono, D. G. Bengen, S. Nurhakim, and A. S. Atmadipoera. 2012. Pola Musiman dan Antar Tahunan Salinitas Permukaan Laut di Perairan Utara Jawa-Madura. Maspari Journal 4(2):168–177.

Pasaribu, B. P., D. Manurung, and D. Nugroho. 2004. Fish Stock Assessment using Marine Acoustics Detection and Oceanographical Characteristic in Java Sea. Gayana 68(2):1–5.

Pasqueron de Fommervault, O., C. Migon, F. D’Ortenzio, M. Ribera d’Alcalà, and L. Coppola. 2015. Temporal variability of nutrient concentrations in the northwestern Mediterranean sea (DYFAMED time-series station). Deep-Sea Research I 100:1–12.

Pramuwardani, I., Hartono, Sunarto, and A. Sopaheluwakan. 2018. Indonesian rainfall variability during Western North Pacific and Australian monsoon phase related to convectively coupled equatorial waves. Arabian Journal of Geosciences 11 (21): 673.

Risko, A S Atmadipoera, I Jaya and E H Sudjono. 2016. Analysis of turbulent mixing in Dewakang Sill, Southern Makassar Strait. IOP conf Publishing.

Sachoemar, S. I., and T. Yanagi. 2001. Seasonal variation of water characteristics in the northern coastal area of Java. La mer 39:77–85.

Susilo, E., F. Islamy, A. J. Saputra, J. J. Hidayat, A. R. Zaky, and K. I. Suniada. 2015. Pengaruh Dinamika Oseanografi Terhadap Hasil Tangkapan Ikan Pelagis PPN Kejawanan dari Data Satelit Oseanografi. Seminar Nasional Perikanan dan Kelautan V. Universitas Brawijaya.

Suthers, I., L. Bowling, T. Kobayashi, and D. Rissik. 2009. Sampling methods for plankton. In: Suthers, I. M. and D. Rissik (eds). Plankton: A Guide to Their Ecology and Monitoring for Water Quality. CSIRO Publishing. Australia.

UNEP. 2007. Approaches to the Assessment of Eutrophication in Mediteranian Coastal Waters.

USEPA. 2001. Technical Guidance Manual Estuarine and Coastal. Washington.

Wei, Q. S., Z. G. Yu, B. D. Wang, M. Z. Fu, C. S. Xia, L. Liu, R. F. Ge, H. W. Wang, and R. Zhan. 2016. Coupling of the spatial-temporal distributions of nutrients and physical conditions in the southern Yellow Sea. Journal of Marine Systems 156:30–45.

Wei, Q., Q. Yao, B. Wang, H. Wang, and Z. Yu. 2015. Long-term variation of nutrients in the southern Yellow Sea. Continental Shelf Research 111:184–196.

Wyrtki, K. 1961. Physical oceanography of Southeast Asian waters. Naga Report 2. Scripps Institution of Oceanography, La Jolla, CA.

Zang, C., S. Huang, M. Wu, S. Du, M. Scholz, F. Gao, C. Lin, Y. Guo, and Y. Dong. 2011. Comparison of Relationships Between pH, Dissolved Oxygen and Chlorophyll a for Aquaculture and Non-aquaculture Waters. Water Air Soil Pollut 219:157–174.

Zhang, J., and X. Gao. 2016. Nutrient distribution and structure affect the acidification of eutrophic ocean margins: A case study in southwestern coast of the Laizhou Bay, China. Marine Pollution Bulletin 111:295–304.


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