长江口低氧区的成因及过程

The origin and process of hypoxia in the Yangtze River Estuary

长江口已成为世界低氧海域的一个代表性区域。近年来长江口低氧区的分布范围不断扩大,强度不断加剧。对该低氧区的表现特征、形成机制、生物地球化学过程以及生态环境影响做系统的分析和综述,并结合世界多处典型低氧区开展对比分析,认为长江口低氧区域在地理学、海洋学上均不同于波罗的海、黑海以及东京湾等区域的低氧区,是全球低氧生态学研究的一个新的案例。该区域的深入研究将有望丰富海洋生态学研究范畴。通过综合地球化学、生态学、物理海洋学等多学科方法和技术手段,发展低氧生态学,为研究海洋低氧现象的形成机制和生态效应,以及开展防治提供方法和理论支持。

The Yangtze Estuary is one of the most typical hypoxic regions in the world.The aggravation and expansion of the hypoxia are obvious in the past few years.This paper aims to synthetically analyze the origin of the hypoxia,its biogeochemical processes and its hazardous influence on the local ecological system.By comparing with other hypoxic areas in the world,the hypoxia of the Yangtze Estuary is found rather different geographically and oceanographically from those in the Gulf of Mexico,the Baltic Sea,the Black Sea and Tokyo Bay.The study of the case would greatly help the deeper research of marine ecology in this area.By briefly combining geochemistry,ecology,oceanography and other subjects,the necessity of developing hypoxia ecology is proposed by the authors to fill the blank in this field.