【摘要】 依据中国科学院南海海洋研究所大亚湾海洋生物综合实验站20a来获得的大量现场观测数据和资料,对大亚湾生态环境和变化趋势进行了分析。其变化主要表现在:由贫营养状态发展到中营养状态,局部海域已出现富营养化的趋势,N/P比的平均值由20世纪80年代的1/1.5上升到近年的大于50,大亚湾营养盐限制因子由80年代的N限制过渡到目前的P限制;生物群落组成明显小型化,生物多样性降低,生物资源衰退。大亚湾具有珊瑚礁、红树林、岩礁等多种海岸类型,但近年出现了石珊瑚白化现象,珊瑚礁群落的优势种发生了改变,在大亚湾的澳头港附近水域多次发生赤潮。这些研究结果表明大亚湾生态系统正经历着快速的退化过程。更多还原

【Abstract】 The Daya Bay, located in the northern South China Sea and covering an area of 600 km~2, is one of the important bays along the southern coast of China. Based on a great deal of observed data and information obtained from the Daya Bay since 1984 when the Daya Bay station was just set up, the environment change in the Daya Bay is studied and its trend is analyzed. The results show that the nutrition status has changed from poor to middle and even eutrophicated level in some parts of the bay. The average N/P ratio has increased from 1/1.5 in 1980s to over 50 at present, and the limiting nutrient factor has changed from N to P. The biological communities have been miniaturized, their biodiversities simplified and the biological resources declined. The phenomenon of stony coral bleaching has appeared, and the dominant species of coral communities have changed. Red tide events have occurred many times in the waters near the Aotou harbor. All of these indicate that the ecosystem of the Daya Bay is undergoing a rapidl deterioration.更多还原