NDLI: Influence of a flood event on salinity and nutrients in the Changshan Archipelago area (Northern Yellow Sea)

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Influence of a flood event on salinity and nutrients in the Changshan Archipelago area (Northern Yellow Sea)

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Influence of a flood event on salinity and nutrients in the Changshan Archipelago area (Northern Yellow Sea)

Content Provider	Springer Nature Link
Author	Zhang, Guangtao Zhao, Zengxia Liu, Changhua Liu, Qun Ren, Jianming
Copyright Year	2012
Abstract	River discharge can deliver nutrients to the coastal zone and change the hydrologic properties of the water column. Soon after a flash flood from the Yalu River (Northeast China) in August 2010, we investigated the salinity and nutrient concentrations, as well as other environmental conditions in the Changshan Archipelago area, located approximately 100 km west of the river mouth in the northern Yellow Sea. Diluted water was mainly observed in the upper layers shallower than 15 m, with surface salinity between 18.13 and 30.44 in the eastern study area and between 28.16 and 29.72 in the western area. Surface salinity showed a significant negative correlation with concentrations of dissolved nutrients (P < 0.05), but not with that of Chlorophyll-a (Chl-a), dissolved oxygen (DO), particulate materials or pH. The average concentrations of nitrite, nitrate, and silicic acid decreased from the surface layer to bottom layer and were significantly higher in the east area than in the west area (P < 0.05). In contrast, average ammonium and phosphate concentrations were highest in the bottom layer of both areas, with no significant spatial differences. DO varied between 6.06 and 8.25 mg L$^{−1}$ in the surface layer, and was significantly higher in the eastern area than in the western area in the surface and middle layers. Chl-a concentration was constantly below 4.09 μg L$^{−1}$. Our work demonstrated the strong influences of Yalu River on proportions of various nutrient components in the Changshan Archipelago area. Silicic acid and total inorganic nitrogen levels were significantly elevated comparing to phosphate in the eastern area. Such changes can potentially induce phosphate limit to phytoplankton growth.
Starting Page	419
Ending Page	426
Page Count	8
File Format	PDF
ISSN	16725182
Journal	Journal of Ocean University of China
Volume Number	11
Issue Number	3
e-ISSN	19935021
Language	English
Publisher	SP Science Press
Publisher Date	2012-07-02
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Yalu River flash flood diluted water salinity nutrients Changshan Archipelago Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography Ocean Engineering

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