Hapenlähteisiin

Hapenlähteisiin, a Finnish term that translates to "oxygen springs," refers to a natural phenomenon characterized by the appearance of bubbles on the surface of bodies of water, particularly lakes and slow-moving rivers. These bubbles are primarily composed of oxygen, a byproduct of photosynthesis carried out by aquatic plants and algae. During daylight hours, when sunlight is available, these organisms vigorously convert carbon dioxide and water into glucose and oxygen. This excess oxygen is then released into the surrounding water, forming the visible bubbles.

The presence of hapenlähteisiin is often an indicator of a healthy and biologically active aquatic ecosystem. It suggests a sufficient abundance of light, nutrients, and photosynthetic organisms. The intensity and frequency of these oxygen springs can vary depending on factors such as water temperature, sunlight intensity, season, and the specific types and density of aquatic vegetation. In some instances, particularly during periods of rapid algal growth or eutrophication, the release of oxygen can be quite pronounced. Conversely, during the night or in conditions with limited sunlight, the bubbling may cease as oxygen production stops. While generally a positive sign, extremely high levels of oxygen, while rare from this source alone, can theoretically contribute to fish stress.