SEASONAL VARIATIONS OF NUTRIENT BUDGETS IN JAKARTA BAY, INDONESIA

Autor:	Rahmania A. Darmawan, Seno Aji, Iwan G. Tejakusuma, Tetsuo Yanagi, Mochamad Saleh Nugrahadi
Rok vydání:	2014
Předmět:	Wet season Hydrology geography Biogeochemical cycle Denitrification geography.geographical_feature_category Nutrient Dry season Environmental science Biogeochemistry Estuary Bay
Zdroj:	Marine Research in Indonesia. 35:9-17
ISSN:	2443-2008 0216-2873
DOI:	10.14203/mri.v35i1.7
Popis:	This study aims to quantify the fluxes of carbon, nitrogen, phosphorus, and silicate in Jakarta Bay and use these flux data to gain an initial understanding of the biogeochemical processes occurring in the system. We investigated water, suspended matter and sediments fluxes from estuarine, coastal water and outside of the bay. Water samples were analyzed for dissolved nutrients, chlorophyll-phytoplankton abundance, and their composition. Suspended matter and sediment were analyzed for carbon and nitrogen. Nutrient concentrations were high in the rivers or estuaries and then decreased rapidly seaward. Calculation budget results showed that Jakarta Bay is a sink for DIP, DIN and DSi during dry season and rainy season. In the dry season, the system is in the slightly fixation condition ([nfix-denit] = 0.03 mmol N m-2 d-1). In contrast, denitrification exceed nitrogen fixation ([nfix-denit] = -9.74 mmol N m-2 d-1) in the rainy season. Moreover, the bay produced net carbon about 2.6-32 mmol C m-2 d-1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a5c544b7bf71367b4b43b059eed35d48 https://doi.org/10.14203/mri.v35i1.7 Zobrazit plný text záznamu