Ulva lactuca as bioindicator of metal contamination in intertidal waters in Hong Kong
Ulva lactuca as bioindicator of metal contamination in intertidal waters in Hong Kong
复制标题
石莼作为香港潮间带水域金属污染的生物指示剂
作者：
Y. Ho
石决明的用途。作为金属污染的指标，通过分析在香港岛周围24个潮间带站点收集的沉积物中Mn、Fe、Ni、Cu、Zn、Cd和Pb的水平来评估。其中12个地点位于该岛南部农村地区，那里的沿海沃茨相对干净。其余12个地点位于北面及维多利亚港内。维多利亚港除接收工业污水外，亦接收来自约350万人口的未经处理住宅污水。城市点石莼中Mn、Fe、Ni、Cu、Zn和Pb的平均含量分别是农村点的4.0、4.6、1.8、2.3、2.4和4.6倍。然而，类似的水平的镉被发现在所有网站之间的土壤中。已查明金属污染程度高的地点，特别是海港东端。初步结果表明，石莼是Mn、Fe、Cu、Zn和Pb污染的良好指示剂。
The use ofUlva lactucaL. as an indicator of metal contamination was assessed by analysing the levels of Mn, Fe, Ni, Cu, Zn, Cd and Pb in the alga collected from 24 intertidal sites around the Island of Hong Kong. Twelve of the sites are in the rural southern parts of the Island where the coastal waters are relatively clean. The remaining 12 sites are located in the north and within Victoria Harbour which receives, apart from industrial effluents, untreated domestic sewage from a population of some 3.5 million. The mean levels of Mn, Fe, Ni, Cu, Zn and Pb inUlvafrom the urban sites were respectively 4.0, 4.6, 1.8, 2.3, 2.4 and 4.6 folds those from the rural sites. However, similar levels of Cd were found in the alga amongst all the sites. Locations of high levels of metal contamination, particularly to the eastern end of the Harbour, have been identified. Preliminary results indicate thatUlvais a good indicator of Mn, Fe, Cu, Zn and Pb contaminations.