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DU Guoying, ZHAO Ezi, LIU Chunrong, TANG Xianghai. Estimating areal carbon fixation of intertidal macroalgal community based on composition dynamics and laboratory measurements[J]. HaiyangYuHuZhao, 2019, 37(1): 93-101

Estimating areal carbon fixation of intertidal macroalgal community based on composition dynamics and laboratory measurements

DU Guoying, ZHAO Ezi, LIU Chunrong, TANG Xianghai
Key Laboratory of Marine Genetics and Breeding, Chinese Ministry of Education, College of Marine Life Sciences, Ocean University of China, Qingdao 266003, China
The community dynamics and potential carbon fixation of intertidal macroalgae were investigated monthly from April 2014 to April 2015 in the northwest coast of Yellow Sea. Seasonal variations in biomass and carbon fixation were presented and showed close relationship with community structure. The carbon fixation rate ranged from 0.48±0.13 mg C/(gFW·d) to 4.35±0.12 mg C/(gFW·d). Sargassum thunbergii, Chondrus ocellatus and Ulva intestinalis were three most influential species which contributed 27%, 21.9% and 18.5% variation of carbon fixation rate, respectively. Standing carbon stocks ranged from 7.52 g C/m2 to 41.31 g C/m2, and estimated carbon stocks varied from 11.77 g C/m2 to 96.49 g C/m2. The larger difference between estimated and standing carbon stocks implied that more fixed carbon was exported from the community in summer and autumn than in winter. This study suggested that intertidal macroalgal community could provide a potential function in carbon fixation of coastal ecosystem.
Key words:    carbon fixation|carbon stock|community composition|intertidal macroalgae|Yellow Sea   
Received: 2017-10-18   Revised: 2017-12-28
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