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Fluxes and Retention of Nutrients and Organic Carbon in Manko Estuary, Okinawa, Japan: Influence of River Discharge Variations

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dc.creator Shilla, Daniel
dc.date 2016-07-08T12:31:47Z
dc.date 2016-07-08T12:31:47Z
dc.date 2014
dc.date.accessioned 2018-03-27T08:23:34Z
dc.date.available 2018-03-27T08:23:34Z
dc.identifier Shilla, D., 2014. Fluxes and retention of nutrients and organic carbon in Manko estuary, Okinawa, Japan: influence of river discharge variations. Advances in Oceanography and Limnology, 5(2), pp.141-163.
dc.identifier http://hdl.handle.net/20.500.11810/2952
dc.identifier 10.1080/19475721.2014.928369
dc.identifier.uri http://hdl.handle.net/20.500.11810/2952
dc.description Full text can be accessed at http://www.tandfonline.com/doi/abs/10.1080/19475721.2014.928369
dc.description Estuaries are often considered important filters for inorganic and organic nutrients, as they are located between the land and sea. This study reports on the fluvial fluxes and estuarine transformations and retention of dissolved nutrients (total oxidized nitrogen [TON = NO2− and NO3−]), NH4+, PO43−, and dissolved organic carbon (DOC) in Manko estuary, Okinawa, Japan. The transport and transformation of dissolved nutrients and DOC varied widely among the eight conducted surveys due to variations in freshwater discharge and subsequent flushing times. Under high fluvial discharge, particularly during the May–June rainy season, the transport of nutrients and DOC accounted for up to 70%, 88%, 93%, and 53% of the annual transport of TON, NH4+, PO43−, and DOC, respectively. The flushing times of river water into the estuary, which varied from 0.5 to 46 days, were important in determining the degree to which fluvial nutrients were transformed and retained within the estuary. The effect of long flushing times was evident during the dry months (December–March), when biological and geochemical processes within the estuary removed most of the fluvial nutrients and DOC.
dc.language en
dc.subject Manko estuary
dc.subject Nutrients
dc.subject Fatty acids
dc.subject Fluxes
dc.subject Organic matter
dc.title Fluxes and Retention of Nutrients and Organic Carbon in Manko Estuary, Okinawa, Japan: Influence of River Discharge Variations
dc.type Journal Article


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