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波罗的海所发生的赤潮,主要是由Nodudaria spupmigena和Aphanizomenon sp.这两种蓝藻形成的。有关这些赤潮的长期变化记录可以从过去(1887～1938年)和现代(1974～1998年)出版的浮游植物数据记录中找到。通过各种不同的收集、分析方法已经得到了大量的数据,为了提高这些数据的可比性,人们正在不断地尝试老的、新的采样方式与固定方法。100多年前,浮游生物就做为鱼类的食物来源而引起了人们的兴趣;富营养化问题主要出现在南部的礁湖(haffs)以及大城市附近的海边水域。二战前,很少有关于开阔海域赤潮的报道。在过去的营养环境中,Nodudaria spupmigena和Aphanizomenon sp.的数量还很少,从1887～1938年的137个夏季采样中表明它们的丰度还没有达到过最高峰。在现在的营养环境中,高丰度是非常普遍的,这两个物种的数目范围相对于过去的营养环境来说有了明显的增长。自20世纪60年代以来,蓝藻赤潮在波罗的海本体与芬兰湾的开阔海域是非常常见的,这表明了营养物已经高度丰富。
The red tides occurring in the Baltic Sea are mainly formed by the two cyanobacteria, Nodudaria spupmigena and Aphanizomenon sp. Long-term changes in these red tides can be found in phytoplankton data records published in the past (1887-1938) and modern (1974-1998). A great deal of data has been obtained through various methods of collection and analysis. In order to improve the comparability of these data, people are constantly trying out old and new sampling methods and methods. More than 100 years ago, plankton became a source of food for fish; eutrophication was mainly found in the southern lakes and seaside waters near major cities. Before World War II, there were few reports of red tides in the open sea. Nodudaria spupmigena and Aphanizomenon sp. Are still rare in past nutritional settings. Their 137 summer samples from 1887 to 1938 show that their abundances have not yet reached their peak. In today’s nutritional environment, high abundance is very common, and the number of these two species has been significantly increased relative to the past nutritional environment. Since the 1960s, the bloom of cyanobacteria has been very common in the Baltic Sea itself and in the open waters of the Gulf of Finland, suggesting that nutrients are already highly abundant.