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http://dx.doi.org/10.4217/OPR.2010.32.4.351

Occurrence of Green Macroalgae (Ulva prolifera) Blooms in the Northern East China Sea in Summer 2008  

Choi, Dong-Lim (South Sea Research Institute, KORDI)
Noh, Jae-Hoon (Marine Living Resources Research Department, KORDI)
Ryu, Joo-Hyung (Korea Ocean Satellite Center, KORDI)
Lee, Jae-Hak (Climate Change & Coastal Disaster Research Department, KORDI)
Jang, Poong-Kuk (South Sea Research Institute, KORDI)
Lee, Tae-Hee (South Sea Research Institute, KORDI)
Choi, Dong-Han (Marine Living Resources Research Department, KORDI)
Publication Information
Ocean and Polar Research / v.32, no.4, 2010 , pp. 351-359 More about this Journal
Abstract
This study examined extensive patches of floating green macroalgal (Ulva prolifera) mats in the northern East China Sea (ECS) using satellite images from mid May through July 2008 and field observation made during early August 2008 cruise. It was previously reported that the massive macroalgal blooms occurred in the coastal areas of Qingdao in China. During our field survey, researchers noticed widely distributed floating patches of macroalgal mats ranging in size from tens of centimeters to a few hundred meters in diameter. Meteorological data in the northern ECS showed high irradiance, high air-temperature, and predominant southerly winds in summer. In the study area during the survey period, surface waters were characterized by the Changjiang Diluted Water (CDW) mass, which contained high concentrations of nitrate and phosphate. The internal transcribed spacer (ITS) sequence of U. prolifera found in the northern ECS was the same as those of U. prolifera sampled from Qingdao blooms, suggesting a possibility that U. prolifera found in two regions would be derived from the same origin. We suggest that U. prolifera in the nearshore Jiangsu Province drifted into the northern ECS and proliferated under favorable meteorological and oceanographic conditions during the summer of 2008.
Keywords
green macroalgae; Ulva prolifera; northern East China Sea; Changjiang Diluted Water (CDW);
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