Vihersuotoa

Vihersuotoa is a Finnish term that translates to "green water" and refers to a phenomenon where bodies of water, such as lakes, ponds, or even slow-moving rivers, develop a noticeable green coloration. This discoloration is typically caused by an overabundance of microscopic algae, a process known as eutrophication or algal bloom.

The green hue is a result of the pigments within the algae, primarily chlorophyll, which they use for photosynthesis. When conditions are favorable, such as warm temperatures, ample sunlight, and an excess of nutrients like phosphorus and nitrogen, algae populations can multiply rapidly. These nutrients often originate from agricultural runoff, sewage discharge, or industrial waste.

While green water is a natural occurrence, excessive algal blooms can have negative ecological consequences. Large blooms can deplete oxygen levels in the water when the algae die and decompose, harming fish and other aquatic life. Some algal species can also produce toxins that are harmful to humans and animals. Monitoring and managing nutrient pollution are key strategies to prevent severe cases of vihersuotoa. The appearance of vihersuotoa can vary in intensity and may be accompanied by a noticeable odor.