Forcasting the response of a coastal ecosystem to persistent forcing: Hypoxia in the Gulf of St. Lawrence

预测沿海生态系统对持续强迫的反应：圣劳伦斯湾缺氧

• 批准号: 365326-2008
• 负责人: Sundby, Bjorn
• 金额: $ 21.76万
• 依托单位: Université du Québec à Rimouski
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=434532
• 关键词: Forcasting; response; coastal; ecosystem; persistent

The state of health of the Gulf of St. Lawrence, a vast ecosystem on the east coast of Canada, has been declining for the last 70 years: there has been a steady decrease in availability of dissolved oxygen to the organisms that live in and use the sea floor and the deep bottom water. The bottom water originates in the slope region of the Western Atlantic Ocean. As this water journeys landward, respiration in water column and sediment consumes oxygen. The bottom water is isolated from the atmosphere, so the lost oxygen cannot be replaced except by slow diffusion from the overlying water. Today, the bottom water of the Lower St. Lawrence Estuary is severely hypoxic, a condition defined by oxygen levels lower than 20% of what is found in

圣劳伦斯湾是加拿大东海岸的一个巨大的生态系统，它的健康状况在过去70年里一直在下降：生活在海底和深海的生物所能获得的溶解氧一直在稳步减少。底水起源于西大西洋的斜坡区。当这些水向陆地移动时，水柱和沉积物中的呼吸作用消耗氧气。底部的水与大气隔绝，所以失去的氧气只能由上面的水缓慢扩散来补充。今天，下圣劳伦斯河口的底部水严重缺氧，这种情况的定义是氧气含量低于水中含量的20%