The main phosphorous sources in the Changjiang estuary

Dongfang Yang; Fan Wang; Zhenqing Miao; Yongli Chen; Yuanzheng Tong

doi:10.1007/s00343-008-0486-5

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The main phosphorous sources in the Changjiang estuary

Updated：2023-05-16

- The main phosphorous sources in the Changjiang estuary
- Journal of Oceanology and Limnology Vol. 26, Issue 4, Pages: 486-497(2008)
- Affiliations：
  
  1. Marine Science College Zhejiang Ocean University
  2. Institute of Oceanology Chinese Academy of Sciences
  3. State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Science
- Author bio：
- Funds：
- DOI：10.1007/s00343-008-0486-5
  CLC：
- Online First：23 January 2009，
  
  Published：2008
- Accepted：
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Yang, D., Wang, F., Miao, Z. et al. The main phosphorous sources in the Changjiang estuary., Chin. J. Ocean. Limnol. 26, 486–497 (2008). https://doi.org/10.1007/s00343-008-0486-5
DOI：

Yang, D., Wang, F., Miao, Z. et al. The main phosphorous sources in the Changjiang estuary., Chin. J. Ocean. Limnol. 26, 486–497 (2008). https://doi.org/10.1007/s00343-008-0486-5 DOI：

摘要

Abstract

Analysis using historical data on the phosphate sources in Changjiang (Yangtze River) estuary show that phosphate was supplied equally from the east

south

west and north of the estuary. These sources include the Changjiang River

the Taiwan Warm Current (TWC)

a cyclone-type eddy

and the 32°N Upwelling

supplying different phosphates in different times

ways and intensities. The magnitude of their supplying phosphate concentration was related with the size in the order of the Changjiang River < the TWC < the 32°N Upwelling < the cyclone-type eddy

and the duration of the supplying was: the Changjiang River > the TWC > the cyclone-type eddy > the 32°N Upwelling. The four sources supplied a great deal of phosphate so that the phosphate concentration in the estuary was kept above 0.2 μmol/L in previous years

satisfying the phytoplankton growth. The horizontal and vertical distribution of the phosphate concentration showed that near shallow marine areas at 122°E/31°N

the TWC in low nutrient concentration became an upwelling through sea bottom and brought up nutrients from sea bottom to marine surface. In addition

horizontal distribution of phosphate concentration was consistent with that of algae: Rhizosolenia robusta

Rhizosolenia calcaravis and Skeletonema

which showed that no matter during high water or low water of Changjiang River

these species brought by the TWC became predominant species. Therefore

the authors believe that the TWC flowed from south to north along the coast and played a role in deflecting the Changjiang River flow from the southern side.

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Keywords

references

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