Blue-green algal situation in inland waters
| Updated: 1.11.2012 - Next update: 31.10.2013 |
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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.
Source:
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.
