Significant and conservative long-range transport of dissolved organic nutrients in the Changjiang diluted water
Kwon, H.K.; Kim, G.; Hwang, J.; Lim, W.A.; Park, J.W.; Kim, T.-H. (2018). Significant and conservative long-range transport of dissolved organic nutrients in the Changjiang diluted water. NPG Scientific Reports 8(1): 7 pp. https://dx.doi.org/10.1038/s41598-018-31105-1
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322, more
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| Authors | | Top |
- Kwon, H.K.
- Kim, G.
- Hwang, J.
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- Lim, W.A.
- Park, J.W.
- Kim, T.-H.
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| Abstract |
The Changjiang River is one of the main nutrient sources in the northwestern Pacific marginal seas. However, most of the previous studies have neglected the long-range transport (>200 km) of riverine nutrients since they are rapidly consumed. In this study, we examined the long-range transport (200–800 km) of nutrients in the surface layer during the summer of 2017. The plots of nutrients against salinity display that dissolved organic nitrogen (DON) was conservative over ~800 km, while more than 99% of the dissolved inorganic nitrogen (DIN) was removed within 200 km. As a result, in the study region, DON concentrations (avg. 7.0 ± 1.3 µM), which are minor in the river water, were much higher than DIN concentrations (avg. 0.28 ± 0.26 µM). Both nutrients, N and P, showed a similar pattern. Our results suggest that dissolved organic nutrients play a critical role on the long-range transport of riverine nutrients in surface waters and subsequent ecosystem changes. |
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