Blue-green algal situation in inland waters
|Updated: 1.11.2012 - Next update: 31.10.2013|
Blue-green algal situation was average in lakes in the summer 2011
In the summer of 2011, blue-green algal situation in lakes was average. In the main, long-term intense blue-green algal blooms were not present in the lakes observed. The most abundant blue-green algal blooms were detected in lakes at the turn of July-August and in the third week of August. Fewer such blooms than usual were found in mid-July and mid-August. Blue-green algal blooms appeared in lakes to a varying extent, largely dictated by weather conditions. In September, fewer than average blue-green algal blooms were found. Extremely abundant and abundant blooms were only reported at individual observation sites.
The Finnish Environment Institute SYKE
Description of indicator
The algae barometer describes the development of blue-green algal blooms on a weekly basis. The columns indicate the relative number of blue-green algae findings, weighted with the abundance of algae. The background indicates the average for the relative amount of blue-green algae calculated for 1998-2010. If the column is higher than the background, this means that, during the week in question, algae in excess of the long-term average was found. Long-term averages for the autumn, from week 36 onwards, are indicative only, being based on limited observation material.