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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41510

Title: Phytoplankton Production during a Summer Coastal Upwelling in the East China Sea
Authors: Yuh-Ling Lee Chen;Houng-Yung Chen;Gwo-Ching Gong;Yen-Huei Lin;Sen Jan;Masayuki Takahashi
Contributors: 國立臺灣海洋大學:海洋環境化學與生態研究所
Keywords: Coastal upwelling;New production;Primary production;Phosphorus;East China Sea;Changjiang
Date: 2004-08
Issue Date: 2017-02-24T05:41:05Z
Publisher: Continental Shelf Research
Abstract: Abstract:Nitrate-based new production and primary production of phytoplankton communities in the continental shelf of the East China Sea (ECS) were studied in the summer (June–July) of 1998. Along the China coast, including the water mixed by the Changjiang (Yangtze) River discharge, upwelling caused diatom blooms. Primary production in the blooming water ranged between 1.47 and 4.50 g C m−2 d−1 and nitrate-based new production ranged between 0.86 and 1.38 g C m−2 d−1. In the adjacent non-blooming mid-shelf and shelf break where water was stratified and surface nitrate concentration was not detectable, primary production ranged between 0.62 and 1.10 g C m−2 d−1 and nitrate-based new production was between 0.06 and 0.46 g C m−2 d−1. Phytoplankton production generally aligns positively with surface phosphate and nitrate concentrations in the whole ECS. The southwest monsoon that prevails in summer acts together with the northward Taiwan Warm Current and China Coastal Current to cause the coastal upwelling. Phosphate from the upwelling partially eased the phosphorus deficiency that has been known to be a special feature of the ECS water mixed by the Changjiang discharge. Surface phosphate concentrations (0.03–0.70 μM) in the upwelling were higher than those of the non-upwelling water (0.02–0.07 μM). The excessive phosphorus from the upwelling stimulates phytoplankton growth and consequently consumes excessive nitrogen from the Changjiang discharge. These observations suggest that in summer phytoplankton production in the riverine coastal water is modulated not only by the nutrients from the upwelling but also by those from the Changjiang discharge; These enhanced productions are likely to fall away in the fall when ceasing of the upwelling stops phosphorus supply.
Relation: 24(12), pp.1321–1338
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41510
Appears in Collections:[海洋環境與生態研究所] 期刊論文

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