海洋胶态物质的生物地球化学循环研究  

Studies on biogeochemistry cycle of marine colloids

作　　者：张兵[1] 罗先香[1] 潘进芬[1] 马启敏[1] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《海洋环境科学》2008年第4期387-390,共4页Marine Environmental Science

基　　金：国家自然科学基金(40406024);国家"973"计划(2002CB412406);山东省自然科学基金(2006ZRA02063)

摘　　要：对近年海洋胶态物质生物地球化学循环研究的进展做了综述。总结了生物影响效应领域的新技术、新成果。切向超滤技术在海洋学上应用促进了海洋胶态物质进一步研究。研究表明,海洋胶态物质的存在对海洋生物影响有着重要的意义,尤其是近岸海域海洋胶态物质有机物含量的增加促进了藻类的繁殖和生长,甚至引发赤潮。胶态物质与金属及其他痕量元素的结合影响了其赋存形态及生物地球化学循环。近年来对胶态物质的生物可利用性的研究结果表明胶态物质对生物的金属可利用性有着重要的影响,使得人们重新考虑已发展建立的自由基活度模型(free ion activity model,FIAM);深入理解生物体内胶态物质的吸收和相关的生理过程将有助于海洋胶态物质的生态效应以及生物可利用性等方面的研究。Studles on the biogeochemistry cycle of the marine colloidal matters were reviewed in this paper. The application of advanced techniques, such as cross-flow ultrafiltration, in researches on the colloidal matters greatly promoted studies on the marine colloids. The marine colloids were bioavailable to microalgae, bivalves and other marine organisms. The binding of metals and other trace elements may control the forms of these elements and thus affects the marine biogeochemistry of them. The recent studies suggest that uptake may vary from a predominant uptake of free-ionic forms to direct ingestion of high molecular weight （HMW） or colloidal complex metals and different mechanisms may operate for different functional groups of aquatic organisms in the accumulation metals. One challenge is to understand the functional physiology in different groups in the aquatic organisms in controlling metal bioavailability from the colloidal phase.

关 键 词：海洋胶态物质 生物地球化学循环 生物可利用性 吸收 机理 

分 类 号：P734[天文地球—海洋化学]