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利用激光粒度分析仪,对2005年夏季采集于海南岛洋浦湾的B1168柱状样品进行了粒度分析测试,并利用同位素比质谱仪,对其总有机碳(TOC)和总氮(TN)的含量进行了测定,同时,利用连续提取法提取了沉积物中的生物硅(BSi),并利用分光光度计进行了测量。通过对上述生源组分与粒度间相关性以及人类影响因子的分析,探讨了人类活动对沉积物中生源组分含量的影响及生源组分的粒度效应,结果表明:从B1168柱状样品的45 cm处起至表层,人类活动明显影响了生源组分的含量,除此之外,生源组分含量还较显著地受粒度控制,沉积物组分的粒度越小,生源组分的含量则越高,但是当沉积物粒径小于0.5μm的时候,TN和BSi含量与其粒级含量的相关性变弱。φ5粒级与各生源组分的含量均呈弱相关,这一结果与该海区表层沉积物粒度组分与TOC、TN含量相关性分析的结果相一致。
The grain size of B1168 column sample collected in Yangpu Bay of Hainan Island in summer 2005 was measured by laser particle size analyzer. The contents of total organic carbon (TOC) and total nitrogen (TN) were measured by isotope ratio mass spectrometry Meanwhile, bio-silica (BSi) in sediment was extracted by continuous extraction method and measured by spectrophotometer. Based on the correlation between the above-mentioned biomass components and grain size and human factors, the effects of human activities on the contents of biogenic components in sediments and the particle size effects of biogenic components were discussed. The results showed that from 45 cm From the surface to the surface, human activities significantly affect the content of biogenic components. In addition, the biogenic component content is also more significantly controlled by the particle size, the smaller the particle size of sediment components, the higher the content of biogenic components However, when the sediment particle size is less than 0.5μm, the correlation between TN and BSi content and its grain size content becomes weaker. φ5 grain size is weakly correlated with the content of each source component, which is consistent with the results of the correlation analysis of grain size fraction and TOC, TN content of surface sediment in the sea area.