Coastal Acidification as Nutrients Over Enrichment Impact: A Case Study in Ambon Bay, Indonesia

Idha Yulia Ikhsani, Donna Marselia Siahaya, Frilla Renty Saputra, Sem Likumahua


Ambon Bay is a silled bay on Ambon Island consisting of two regions, Inner Ambon Bay (IAB) and Outer Ambon Bay (OAB) that are separated by shallow sill. Ambon bay and its surrounding have economically important ecosystem since the utilization for many activities. The bay is affected by anthropogenic impacts associated with urbanization, climate change, and nutrients over enrichment. The “deep water-rich nutrients†from Banda Sea that enter the bay during Southeast monsoon also contribute to this enrichment as well as the nutrients transport from the land. The high concentration of nutrients increases carbon dioxide level and promotes acidifications. There are literatures about nutrients over enrichment in Ambon Bay, however, little is known about coastal acidification as nutrients over enrichment impact. In order to study the effect of nutrients distribution on the acidity of Ambon Bay, the researchers measured pH and concentrations of nutrients {nitrate + nitrite (N+N) and Soluble Reactive Phosphate (SRP)} from water samples collected in 7 stations on both IAB and OAB during Southeast monsoon. The results showed that in surface water, nutrients concentrations is increased from May to June due to the “deep water flushing†occurrence on May and increased precipitations from May to June. From July to August, the nutrients concentrations on surface layer decreased, due to the decreased precipitations. In column and bottom water, the nutrients concentrations were increased from May to August. While the acidity have reverse pattern from the nutrients, when nutrient concentrations increased the acidity was decreased. From correlation test, pH was not significantly correlated with the concentrations of nutrients on surface water, but showed significantly correlated on column and bottom water. The results indicated that the distribution of nutrients on column and bottom water might be an important environmental factor affecting the acidification of the Ambon Bay in Southeast monsoon.

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Anderson, J.J & Devol, A.H. 1973. Deep water renewal in Saanich Inlet, an intermittently anoxic basin. Estuarine and Coastal Marine Science 1: 1–10.

Anderson, J.J & Sapulete, D. 1981. Deep water renewal in Ambon Bay, Ambon, Indonesia. Procedings of the Fourth International Coral Reef Symposium 1: 369-374.

Aparicio, F.I., Nieto-Cid, M., Borrull, E., Calvo, E., Palejero, C., Sala, M.M., Pinhassi, J. Gasol, J.M. Marassé, C. 2016. Eutrophication and acidification: Do they induce changes in dissolved organic matter dynamics in the coastal Mediterranean Sea. Science of the Total Environment 563: 179–189.

Basit, A., Putri, M.R., Tatipatta, W.M. 2012. Estimation of seasonal vertically integrated primary productivity in Ambon Bay using the depth-esolved, time-integrated production model. Marine Research in Indonesia 37: 47-56.

Cockharn, J.K. 2014. Chemical oceanogrphy. In Reference Module in Earth System and Environmental Sciences.USA.

de Jonge, V.N., Elliot, M., Orive, M. 2002. Causes, historical development, effect and future challenges of a common environmental problem: eutrophication. Hydrobiologia 475: 1–19.

Desbiolles, F., Blanke, B., Bentamy, A., Roy, C. 2016. Respon of the Southern Benguela upwelling system to fine-scale modifications of the coastal wind. Journal of Marine System 156: 46-55.

Feely, R.A., Sabine, C.L. Hernandez-Ayon, J.M., Ianson, D., Hales, B. 2008. Evidence for upwelling of corrosive “acidified†water onto the continental shelf. Science 320: 1490–1492.

Feely, R.A., Alin, S.R., Newton, J., Sabine, C.I., Warner, M., Devoll, A., Krembs, C., Maloy. C. 2010. The combined effect of ocean acidification, mixing, and respiration on pH and carbonate saturation in an urbanized estuary. Estuarine, Coastal and Shelf Science 88: 442-449.

Gargett, A.E., Stucchi, D., Whitney, F. 2003. Physical processes associated with high primary production in Saanich Inlet, British Columbia. Estuarine, Coastal and Shelf Science 56: 1141–1156.

Gilbert, D., Rabalais, N.N., Diaz, R.J. Zhang, J. 2010. Evidence for greater oxygen decline rates in the coastal ocean than in the open ocean. Biogeosciences 7: 2283-2296.

Gilbert, P.M., Burkholder, J.A.M., Granéli, E., Anderson, D.M. 2008. Advances and insight in the complex relationship between eutrophication and HABs: Preface to the special issue. Harmful Algae 8: 1 - 2

Heisler, J., Gilbert, P.M., Burkholder, J.M., Anderson, D.M., Cochlan, W., Dennison, W.C., Dortch, Q., Gobler, C.J., Heil, C.A., Humpries, E., Lewitus, A., Maginien, R., Marshal, H.G., Sellner, K., Stockwell, D.A., Stoecker, D.K., Suddelson. M. 2008. Eutrophication and harmful algal blooms: A scientific consensus. Harmful Algae 8: 3 – 13.

Holmer, M., Olsen, A.B. 2002. Role of decomposition of mangrove and seagrass detritus in sediment carbon and nitrogen cycling in a tropical mangrove forest. Aquatic Microbial Technology 230: 87-101.

Ikhsani, I.Y., Abdul, M.S, Lekalette, J. 2016. Phosphate and nitrate distribution in inner Ambon Bay during northwest and southeast monsoon. Widyariset 2: 86-95.

Kristensen, E., Andersen, F.Ø., Holmboe, N., Holmer, M., Thongtham, N. 2000. Carbon and nitrogen mineralization in sediment of the Bangrong mangrove area, Phuket, Thailad. Aquatic Microbial Technology 22: 199-213.

Loureiro, S., Reňè, A., Garcès, E., Camp, J., Vaquè, D. 2011. Harmful Algal blooms (HABs), dissolved organic matter (DOM), and planktonic microbial community dynamic at a near-shore and a harbor station influenced by upwelling (SW Iberian Peninsula). Journal of Sea Research 65: 401-413.

Pello, F.S., Adiwilaga, E.M., Huliselan, N.V., Damar, A. 2014. Seasonal variation of the composition and density of phytoplankton in inner Ambon Bay. Aquatic Science and Technology 2: 30–41.

Ray, R., Rixen, T., Baum, A., Malik, A., Gleixer, G., Jana, T.K. 2015. Distribution, sources and biogeochemistry of organic matter in a mangrove dominated estuarine system (Indian Sundarbans) during the pre-monsoon. Estuarine, Coastal and Shelf Science 167: 404-413.

Ruiz-Castillo, E., Gomez-Valdes, J. Sheinbaum, J., Rioja-Nieto, R. 2016. Wind-driven coastal upwelling and westward circulation in the Yucatan shelf. Continental Shelf Research 118: 63-76.

Sarmiento, J.L. Gruber, N. 2004. Ocean Biogeochemical in dynamics. Princeton University Press.

Seitzinger, S.P., Harrison, J.A., Dumont, E., Beusen, A.H., Bouwman, A.F. 2005. Sources and delivery of carbon, nitrogen, and phosphorus to the coastal zone: An overview of Global Nutrients Export from Watersheds (NEWS) models and their application. Global Biogeochemical Cycles 19 (4).

Sims, J.T., Simard, R.R., Joern, B.C. 1998. Phosphorus loss in agricultural drainage: Historical prespective and current research. Journal of Environmental Quality 27: 277-293.

Smith, V.H., Tilman, G.D., Nekola, J.C. 1999. Eutrophication: impact of excess nutrients input on freshwater, marine, and terrestrial ecosystem. Environmental Pollution 100: 179-196.

Strickland, J.D.H., Parsons, T.R. 1970. Inorganic micronutrients in sea water. In: A practical handbook of seawater analysis. Ottawa, Canada.

Wallace, R.B, Baumann, H., Grear, J.S., Aller, R.C., Gobler, C.J. 2014. Coastal ocean acidification: The other eutrophication problem. Estuaries, Coastal and Shelf Science 148: 1–13.

Wenno, L.F., Anderson, J.J. 1984. Evidence for tidal upwelling across the sill of Ambon Bay. Marine Research in Indonesia 23: 13–20.

Wetsteyn, F.J., Ilahude, A.G., Baars, M.A. 1990. Nutrients distribution in the upper 300 M of the eastern Banda Sea and northern Arafura Sea during and after the upwelling season. Netherlands Journal of Sea Research 25: 449–64.

Wyrtki, K. 1961. In Physical Oceanography of the Southeast Asean Waters. 29-36. The University of California. La Jolla, Caliofornia.

Zhai, W.D., Zhao, H.D., Zheng, N., Xu, Y. 2012. Coastal acidification in summer bottom oxygen-depleted waters in northwestern-northern Bohai Sea from June to August in 2011. Chinese Science Bulletin 57: 1062-1068.

Zhang, J., Gao, X. 2016. Nutrients distribution and structure affect the acidification of eutrophic ocean margins: A case study in southwestern coast of the Laizhou Bay, China. Marine Pollution Bulletin. In press

Zijlstra, J.J., Baars, M.A., Tijssen, S.B., Wetsteyn, F.J., Witte, J.I.J. 1990. Monsoonal effect on the hydrography of the upper waters (<300m) of the eastern Banda Sea and northern Arafura Sea, with special reference to vertical transpport processes. Netherland Journal of Sea Research 25: 431–447.


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