A total of 106 surface water samples were collected in the South China Sea during two transects in June and December 1998. The samples were collected with strictly contamination free proce- dure and trace metals were ...A total of 106 surface water samples were collected in the South China Sea during two transects in June and December 1998. The samples were collected with strictly contamination free proce- dure and trace metals were measured by clean laboratory methods and GFAAS. The mean concentrations for the disolved fractions are: Cu 0.100 μg/dm3, Pb 0.060 μg/dm3, Zn 0.086 μg/dm3, Cd 0.007 μg/dm3, which is close to the world open ocean'slevel. The spatial distribution of the trace heavy met- als shows higher concentrations in offshore area and lower concentrations in the central in the South Chi- na Sea, and the concentrations decrease with the distance from the offshore, which suggests the exis- tence of significant continental shelf input of the trace heavy metals. The correlationship among the ele- ments is better in surnmer than that in winter. Cu is positively correlated with Cd in both seasons and it is also found for the first time that they are positively correlated with nutrients in the South China Sea surface waters which further indicate the biogeochemical cycle of these elements in the marine environ- ment. The baseline value of Cu, Pb, Zn, Cd in the South China Sea surface waters is obtained through statistical analysis.展开更多
基金This work was supported by the Director founds of Third Institute of Oceanography of State Oceanic Administration un-der contr
文摘A total of 106 surface water samples were collected in the South China Sea during two transects in June and December 1998. The samples were collected with strictly contamination free proce- dure and trace metals were measured by clean laboratory methods and GFAAS. The mean concentrations for the disolved fractions are: Cu 0.100 μg/dm3, Pb 0.060 μg/dm3, Zn 0.086 μg/dm3, Cd 0.007 μg/dm3, which is close to the world open ocean'slevel. The spatial distribution of the trace heavy met- als shows higher concentrations in offshore area and lower concentrations in the central in the South Chi- na Sea, and the concentrations decrease with the distance from the offshore, which suggests the exis- tence of significant continental shelf input of the trace heavy metals. The correlationship among the ele- ments is better in surnmer than that in winter. Cu is positively correlated with Cd in both seasons and it is also found for the first time that they are positively correlated with nutrients in the South China Sea surface waters which further indicate the biogeochemical cycle of these elements in the marine environ- ment. The baseline value of Cu, Pb, Zn, Cd in the South China Sea surface waters is obtained through statistical analysis.
基金国家自然科学基金(NSFC41276156)国家发改委产业化专项(2159999)+4 种基金国家863计划(2012AA092303)上海市科技创新行动计划(12231203900)农业部大洋渔业资源环境科学观测实验站(Scientific Observing and Experimental Station of Oceanic Fishery ResourcesMinistry of AgricultureP.R.China)的资助
文摘茎柔鱼(Dosidicus gigas)是东太平洋海域重要的经济头足类,分布很广,群体结构和生活史过程复杂。头足类耳石生态信息丰富,多被用于生活史重建、群体划分等领域的研究。本研究根据我国鱿钓船2007和2008年在智利外海采集的茎柔鱼样本,利用激光剥蚀电感等离子质谱法(Laser ablation inductively coupled plasma mass spectrometry,LA-ICP-MS)分析了18枚茎柔鱼耳石的微量元素组成及其分布特性。分析表明,茎柔鱼耳石主要由48种元素组成,含量最多的前10位元素分别为钙(Ca)、锶(Sr)、钠(Na)、硅(Si)、钾(K)、镁(Mg)、钡(Ba)、锌(Zn)、锰(Mn)和锂(Li)。方差分析表明,不同性别间茎柔鱼耳石的Ca、Sr、K、Mg、Ba、Zn、Mn和Li含量不存在显著性差异,而Na和Si差异性明显;不同孵化群体间,除Zn和Mn不存在显著性差异外,其余元素的含量均存在显著性差异;茎柔鱼耳石的不同部位间,Sr、Na、K、Mg、Ba、Zn、Mn和Li的含量都存在显著性差异,而Ca和Si不存在显著性差异。研究表明,Sr、Ba、Mg、K和Li比较适合用于研究茎柔鱼群体的划分、洄游分布等方面的研究。
