Growth and loss of mariculture kelp Saccharina japonica in Sungo Bay, China
文献类型: 外文期刊
第一作者: Zhang, Jihong
作者: Zhang, Jihong;Fang, Jianguang;Wang, Wei;Du, Meirong;Gao, Yaping;Zhang, Mingliang;Zhang, Jihong;Fang, Jianguang;Wang, Wei;Du, Meirong;Gao, Yaping;Zhang, Mingliang
作者机构:
关键词: Kelp Saccharina japonica;Growth;Distal erosion;Falloff;Breakoff;Sungo Bay;Laminariales
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: The aim of this study was to understand the growth dynamics of Saccharina japonica (previously known as Laminaria japonica), particularly the portion lost during its growth cycle and the key factors that control loss rate in Sungo Bay, China. Growth and loss of S. japonica were investigated between January and July 2010 in Sungo Bay. Losses of the seaweed are typically the result of three factors: removal of the entire individual from mariculture ropes (falloff), breakage in sections of the thalli (breakoff), and erosion of distal tissue. Results showed that individual growth rates in wet weight ranged between 2.4 and 32.7 g day-1. The total falloff rate was approximately 16% and took place during January and February. Breakoff rate showed a significant positive correlation with kelp length and took place during June and July. The erosion rate increased significantly from January to the end of April, reaching a maximum value of 20.4 g day-1 on 25 April, and maintained a relatively higher value following the peak value (approximately 10-15 g day-1). Erosion rates were positively correlated with temperature (r=0.787, n=23, p<0.01) before May; however, they were not significantly correlated with temperature from May to July (p=>0.05). There was no significant relationship between erosion and transparency. At the end of this experiment, the ratio of total loss of carbon and nitrogen to gross production was 61% and 54%, respectively. Loss from distal erosion, falloff, and breakoff in carbon was 91.5, 4.2, and 4.3%, respectively. In Sungo Bay, the annual gross production and total loss in carbon and nitrogen were estimated to be 58,652 t C and 3,506 t N, and 36,150 t C and 1,920 t N. This is expected to have a significant impact on the detritus available in the food chain.
分类号: Q94
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