方格星虫滩涂养殖对沉积物TOC和TN垂直分布的影响  

Effects of Sipunculus nudus Mudflat Aquaculture on the Vertical Distribution of TOC and TN in Sediments

作　　者：刘旭佳 黄国强 陆洁 彭银辉 潘绘竹 刘永宏 LIU Xujia;HUANG Guoqiang;LU Jie;PENG Yinhui;PAN Huizhu;LIU Yonghong(Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Marine Sciences(Guangxi Mangrove Center),Guangxi Academy of Sciences,Nanning,Guangxi,530007,China;Institute of Marine Drug,Guangxi University of Chinese Medicine,Nanning,Guangxi,530200,China;Guangxi Marine Environment Monitoring Center Station,Beihai,Guangxi,536000,China;Guangxi Key Laboratory of Marine Biodiversity Conservation,Oceanography Institute,Beibu Gulf University,Qinzhou,Guangxi,535011,China)

机构地区：[1]广西科学院,广西海洋科学院(广西红树林中心),广西近海海洋环境科学重点实验室,广西南宁530007 [2]广西中医药大学海洋药物研究院,广西南宁530200 [3]广西海洋环境监测中心站,广西北海536000 [4]北部湾大学海洋学院,广西海洋生物多样性养护重点实验室,广西钦州535011

出　　处：《广西科学》2023年第4期653-662,共10页Guangxi Sciences

基　　金：国家自然科学基金项目(31160532);广西自然科学基金项目(2015GXNSFBA139081);广西八桂学者专项经费(05019055)资助。

摘　　要：为探讨方格星虫(Sipunculus nudus)滩涂养殖对沉积物环境的影响,采用滩涂围隔法研究方格星虫不同养殖密度(0、5、10、15、20 ind./m^(2))条件下围隔中沉积物总有机碳(TOC)和总氮(TN)含量的季节变化。结果显示,10 ind./m^(2)养殖密度处理下的方格星虫成活率和规格最高,分别为(61.1±36.1)%和(5.21±0.69) g/ind.,但不同处理间差异不显著(P>0.05)。方格星虫不同密度养殖过程中,滩涂沉积物的TOC含量基本呈随着深度的增加而升高的趋势,且不同深度间TOC含量存在显著差异(P<0.05);而TN含量垂直分布比较均匀,说明方格星虫生物扰动会导致有机质向下层迁移。整体上来看,所有养殖密度处理围隔中滩涂沉积物TOC和TN平均含量分别呈现“V”型和“∧”型的季节变化规律。15 ind./m^(2)和20 ind./m^(2)养殖密度处理围隔中滩涂沉积物TOC的全年平均含量低于空白对照;所有养殖密度处理围隔中滩涂沉积物TN的全年平均含量均高于空白对照。研究结果表明方格星虫属于滩涂低碳养殖物种。In order to investigate the effects of Sipunculus nudus culture on sediment environment,the seasonal variation of Total Organic Carbon(TOC)and Total Nitrogen(TN)contents in the sediment of the enclosure under different culture densities(0,5,10,15,20 ind./m^(2))of S.nudus were studied by the tidal flat enclosure method.The results showed that the survival rate and size of S.nudus were the highest at 10 ind./m^(2),which were(61.1±36.1)%and(5.21±0.69)g/ind.,respectively,but there was no significant difference among different treatments(P>0.05).In the process of different density culture of S.nudus,the TOC content of tidal flat sediments increased with the increase of depth,and there was a significant difference in TOC content between different depths(P<0.05).The vertical distribution of TN content is relatively uniform,which indicates that the bioturbation of S.nudus will lead to the migration of organic matter to the lower layer.On the whole,the average contents of TOC and TN in the tidal flat sediments in the enclosures of all aquaculture density treatments showed a seasonal variation pattern of“V”and“∧”,respectively.The annual average content of TOC in the tidal flat sediments treated with 15 ind./m^(2) and 20 ind./m^(2) was lower than that of the blank control.The annual average content of TN in the tidal flat sediments of all aquaculture density treatments was higher than that of the blank control.The results showed that the S.nudus belonged to low-carbon culture species in the tidal flat.

关 键 词：方格星虫 围隔 沉积物 有机碳 总氮 

分 类 号：Q178.5[生物学—水生生物学]