The dynamics of micro-propagules before the Green tide outbreak in the Southern Huanghai Sea and Changjiang(Yangtze) River Estuary area

FANG Song; WANG Zongling; LI Yan; FU Mingzhu; FAN Shiliang; WANG Xiao; ZHANG Xiaohong

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Article Navigation > Haiyang Xuebao > 2012 > 34(4): 147-154

FANG Song, WANG Zongling, LI Yan, FU Mingzhu, FAN Shiliang, WANG Xiao, ZHANG Xiaohong. The dynamics of micro-propagules before the Green tide outbreak in the Southern Huanghai Sea and Changjiang(Yangtze) River Estuary area[J]. Haiyang Xuebao, 2012, 34(4): 147-154.

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The dynamics of micro-propagules before the Green tide outbreak in the Southern Huanghai Sea and Changjiang(Yangtze) River Estuary area

First Institute of Oceanography State Oceanic Administration, Qingdao 266061, China;Marine Ecological Environmental Science and Engineering Laboratory of the State Oceanic Administration, Qingdao 266061, China

Received Date: 2011-11-16
Rev Recd Date: 2012-02-09

Abstract

Abstract

Based on the monthly surveys conducted in the Southern Huanghai Sea and Changjiang(Yangtze) River Estuary during March to May 2011,the temporal and spatial distribution features of green algae micro-propagules in water and sediment were studied.The results showed:the spatial distribution of micro-propagules in the waters increased gradually from inshore to offshore areas in the Southern Huanghai Sea.The high values were presented mainly in the adjacent Porphyra farming area,and no micro-propagules were detected to the east of 122°30' E. The average densities of micro-propagules in March,April and May were 144,164 and 140 inds/dm³ respectively,and the corresponding maximum densities were 278,426 and 537 inds/dm³ respectively.The content of micro-propagules in sediments ranged from 19 to 127 inds per layer,and this decreased with depth.Low density of micro-propagules (1-10 inds/dm³) were detected to the north of the Changjiang(Yangtze) River Estuary along the Jiangsu coast,while no micro-propagules were observed in the stations to the south of 31°N.Therefore,we could exclude the possibility that the green tide algae were carried into the sea by the Changjiang River or by the waters from south of the Changjiang(Yangtz) River Estuary.The research carried out, just before the breakout of green tide,was expected to predict the potential biomass of the green-tide Ulva species in seawater and provide technical support to green-tide control.
- Southern Huanghai Sea,
- green-tide algae,
- micro-propagules,
- temporal and spatial distribution

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References(24)

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