【摘要】 <正> 海水中除了H、O、C、N、Na、Mg、P、S、Cl、K、Ca等11种大量元素外,还有种类繁多、但含量极微的微量元素。至今在海水中已经测出的微量元素有41种;由于测定方法所限,还未能将在陆地上所发现的全部金属元素都测出,但可以推断,海洋中含有陆地所有的一切金属元素。生长在这种均匀而特殊的介质中的动植物,其各种生理功能必然会受到这些金属离子的影响:有的组成细胞质、细胞壁的成分,有的则构成酶的成分,有更多还原

【Abstract】 7 samples (5 species) of Chlorophyceae, 13 samples (12 species) of Rhodophyceae and 30 samples of Phaeophyceae (14 sp. and 10 samples determined to the genus only), collected on the China coast, were spectrographically .analyzed by using 22 type Quartz Spectrograph.The results show that Na, Mg, Ca, Fe, Si, K, Al, Ba,B,Be, Ti, V, Sr, Ag, Ni, Zn, Co, Cr, Li, Mn and Cu were found in practically- all the samples analyzed and in few samples Sn, Pb, and Cd were also found. In all the samples, the trace elements Sr, Ti, V, Cu, Mn, Ni and Ag were quantitatively analyzed.It has been found that in Chlorophyceae Sr, Ti and Cu are generally more abundant, then Mn, and finally V; Ag and Ni occur in small amounts. It has attracted our attention that Halimeda macroloba,a common tropical seaweed in the South Sea region, contains a considerably high amount of Sr and Cu, reaching 8,200 and 5,500 mg/kg respectively. (Table 1).In Rhodophyceae, Gelidium divaricatum, Eucheuma sp., Caloglossa lepriurii and a common calcareous species, Corallina officinalis accumulated comparatively more Sr than the others, being 610-960 mg/kg. It is surprising to found in Caloglossa lepliurii large amounts of Ti and Cu, reaching 1,900 and 2,360 mg/kg respectively (Table 2). Seasonal variation studies of the trace elements in Gelidium amansii showed that all elements determined give high values in autumn i.e. in Sept. and Oct., and low values in winter i.e. in Dec. (Table 3 and Fig. 1).In Phaeophyceae, the Sargassums are generally rich in Sr and Cu (Table 4). Although the seasonal variation of trace elements in Sargassum pallidum was in general rather irregular, in the case of the Sr content, however, there was some tendency to be somewhat higher in winter, i.e. from Nov. to Jan., and lower in summer (Table 5 and Fig. 2).The ratios of the trace elements concentration in Sargassum pallidum (fresh weight) to those in sea water were also investigated, and it was found that Sr in the Sargassum was 20-70 times, Ti 900 times, V 2,000 times, Mn 700 times and Cu 400-3,000 times more than those in sea water (Table 6).更多还原