IMAR - CMA - Marine and Environmental Research Centre, Department of Zoology, University of Coimbra, 3004-517 Coimbra, Portugal.
Mar Pollut Bull. 2010 Apr;60(4):601-8. doi: 10.1016/j.marpolbul.2009.11.004. Epub 2009 Dec 5.
The Mondego estuary (Portugal) suffered major changes in environmental quality due to eutrophication, however, in the late 1990 s a restoration project was implemented in order to return the system to its original condition. The main goal of this paper is to evaluate the ecosystem response to the restoration measures applied at three different levels: water quality, primary producers and primary consumers. In post-restoration period a clear decline was observed in dissolved inorganic nitrogen which was reflected in the gradual recovery of Zostera noltii and a concomitant decline in green macroalgae. Macrobenthic assemblages responded variably to the recovery process. In the seagrass bed and intermediate area, there was a large increase in total biomass, but in the eutrophic area species diversity increased. Despite improvement in the ecological status of the system, full recovery has not been achieved yet, possible due to hysteresis in the dynamics of this system.
由于富营养化，蒙得哥河口（葡萄牙）的环境质量发生了重大变化，但在 20 世纪 90 年代末，实施了一项恢复项目，以使该系统恢复到原始状态。本文的主要目的是评估生态系统对在三个不同水平上实施的恢复措施的响应：水质、初级生产者和初级消费者。在恢复后时期，观察到溶解无机氮明显下降，这反映在 Zostera noltii 的逐渐恢复和绿藻的相应减少。底栖动物群落对恢复过程的反应各不相同。在海草床和中间区域，总生物量大量增加，但在富营养化区域，物种多样性增加。尽管系统的生态状况有所改善，但尚未完全恢复，这可能是由于该系统的动态存在滞后。
