Bioremediation efficiencies of Gracilaria verrucosa cultivated in an enclosed sea area of Hangzhou Bay, China

文献类型： 外文期刊

第一作者： Huo, Yuan Zi

作者： Huo, Yuan Zi;Xu, Shan Nan;Wang, Yang Yang;Zhang, Jian Heng;Zhang, Yin Jiang;Wu, Wei Ning;He, Pei Min;Chen, Ya Qu

作者机构：

关键词： nitrate-nitrogen: pollutant;water pollutant;ammonium-nitrogen: pollutant;water pollutant;dissolved inorganic nitrogen: pollutant;water pollutant;nitrite-nitrogen: pollutant;water pollutant;phosphate-phosphorus: pollutant;water pollutantChina Sea: North Pacific;Pacific Ocean;Hangzhou Bay: China;Asia;Palearctic region;eutrophication;species richness;species diversity;red tide;sea water quality;annual growth rate;seaweed cultivation;bioremediation efficiency;Fengxian enclosed sea area;Jinshan enclosed sea area

期刊名称：JOURNAL OF APPLIED PHYCOLOGY （ 影响因子：3.215； 五年影响因子：3.612 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Due to the discharge of nutrients into the East China Sea, severe eutrophication has appeared in Hangzhou Bay. Therefore, we cultivated Gracilaria verrucosa on a large scale in the Jinshan enclosed sea with an area of 1.72 km(2) in the northern part of Hangzhou Bay to perform bioremediation. The Fengxian enclosed sea with an area of 2.3 km(2) and 50 km far from Jinshan was used as the control. The results showed that the Hangzhou Bay was severely eutrophicated before G. verrucosa cultivation. During the period of cultivation between August 2006 and July 2007, the annual growth rate of G. verrucosa was 9.42% day(-1), and the sea water quality was improved from worse than grade IV to grades II-III, with the concentration of dissolved inorganic nitrogen (DIN) and PO4-P significantly lower than that in the Fengxian enclosed sea (p < 0.01). The concentration of NH4-N, NO3-N, NO2-N, and PO4-P after G. verrucosa cultivation was decreased by 54.12%, 75.54%, 49.81%, and 49.00%, respectively. The density of phytoplankton in the Jinshan enclosed sea with cultivation of G. verrucosa was 6.90 -126.53 x 10(4) cells m(-3), which was significantly lower than that in the Fengxian enclosed sea. In addition, species diversity, richness, and evenness was significantly increased after cultivation of G. verrucosa in the Jinshan enclosed sea compared with that in the Fengxian enclosed sea. The density of Skeletonema costatum, Prorocentrum micans, and Prorocentrum donghaiense, which were the usual species of red tides at the coastal sea of China, in the Jinshan enclosed sea with cultivation of G. verrucosa was significantly lower. Based on these results, if the water quality in the Jinshan enclosed sea were to be maintained at grade I (DIN a parts per thousand currency sign0.20 mg L-1) or II (DIN a parts per thousand currency sign0.30 mg L-1), 21.8 t or 18.0 t fresh weight of G. verrucosa need to be cultivated, respectively. These results indicated that large-scale cultivation of G. verrucosa could play a significant role in the bioremediation of Hangzhou Bay.

分类号： Q94

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