海岸带营养盐生物地球化学研究评述

A Review of Nutrient Biogeochemistry Research of the Coastal Zone

海岸带营养盐生物地球化学是研究海岸带营养盐的地球化学过程及其对海洋生物影响的一门新兴学科,近年来取得了长足的发展。本文从海岸带营养盐来源、营养盐主要过程和营养盐通量变化对海岸带生态环境造成的影响等三方面综述了近年来国外部分河口与海岸带营养盐生物地球化学研究进展。尽管目前还不是十分清楚营养盐通量变化对海岸带生态系统影响的范围和幅度究竟有多大,但营养盐输入的增加趋势意味着海岸带营养盐通量可能持续地升高,同时、值也将不断升高,这种趋势将极有可能改 N/SiP/Si 变海岸带浮游植物种群和数量,并诱发底层水缺氧现象,对海洋生态环境造成严重破坏。

Biogeochemisty of the coastal zone is a new type of disciplines, which mainly researches the nutrient geochemistry processes and their impacts on the halobios, and in recent years, has made great progress. This paper summarizes the development in nutrient biogeochemisty research in some estuaries and coastal zones. Although there is some uncertainty about impacts of changing nutrient inputs, the increasing trends in inputs of nutrients mean that the fluxes of nutrients are likely to continue to rise and the P:Si and N:Si ratios will also rise. This trend may alter phytoplankton communities and the amount of phytoplankton and cause hypoxia in bottom water to a great degree.