Water is a very special liquid. For example, the energy retention of water is very good, while it takes a lot of energy to heat water. These photos from a thermal camera day and night show the comparatively cold water (dark blue) in the biological pool (during the day) and the high temperatures, at [...]

Silent lakes give off an air of tranquility and peace. It is not by coincidence that many biological pools for tourist use offer contemplative spaces close to water. Many of the facilities have, like the one in the photo, playing or meditation platforms, outdoor activities that use the contemplative scenery offered by the water [...]

Welcome to Portugal could be said to this new species of dragonfly who is entering Portuguese territory from Spain. It is not an introduction because the insects come by their own. Scientists call it Trithemis kirbyi. About two decades ago, the dragonfly began to occupy the neighboring country Spain from North Africa where it [...]

There are few rare species of aquatic plants. Many of them have a large distribution from North to South in Europe and even some are found naturally on both sides of the Atlantic Ocean or from Portugal to Siberia. This is explained by the adaptation of aquatic plants to live in or at the [...]

Plant growth is essential for the ecosystem in a biological pool. Well growing plants incorporate nutrients diluted in water and are thus the natural competitors of algae. Well-developed aquatic vegetation is the basis for bathing  water quality. Like terrestrial plants, aquatic plants also release a lot of oxygen during the day. In well-oxygenated water, [...]