大亚湾海洋牧场低碳渔业生产效果评价

Effect Evaluation of a Low-carbon Fisheries Production by Marine Ranching in Daya Bay

以基于人工鱼礁为构建主体的大亚湾海洋牧场为研究实例,以2007年4月和2009年5月调查数据为基础,研究了海洋牧场在资源养护和提高海域碳汇能力等方面的作用。结果表明,人工鱼礁型海洋牧场建设提高了海域浮游生物和底栖生物的栖息密度以及渔业资源的数量和质量,底栖生物和游泳生物的生物多样性指数增加,渔业资源优势种中的优质经济鱼类的数量增加。根据海域叶绿素浓度的提高进行计算,海洋牧场建设使海域碳汇增加了937.40kgC,相当于3.44tCO2。如果同时考虑通过渔业生物收获从海域中移出碳而增加的海域碳汇能力,则其起到的海域碳增汇能力将更高。本研究的结果表明,海洋牧场是一种环境友好型、可持续发展的低碳渔业生产模式,有利于水生生物资源养护和增殖,也是生物碳汇扩增的科学途径。

The effects of a low-carbon fisheries production by marine ranching on marine resources conservation and marine carbon sink were assessed in Daya Bay, according to the field investigation data of April 2007 and May 2009. The results showed that there was an ecological regulation effect of marine ranching on environment and fishery resources. The densities of phytoplankton, zooplankton and benthos were higher in the marine ranching areas than those in the adjacent waters. There was also an obvious increment of species and quantity of fishery resource. Moreover, the number and biomass of dominant commercial fish with high market value were increased markedly in the area of marine ranching. The carbon sink capability of marine ranching water was increased, approximate more than 937.40 kgC was fixed in the area of marine ranching, which equivalent to 3.44 metric tons of carbon dioxide. The results indicated that the marine ranching not only has positive effects on living aquatic resources, but also provided a new pattern for the development of low-carbon fisheries.