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Een verdere algensoort zijn de zogenaamde blauwalgen. Ze vormen een blauw-groene smeer of bruinachtige smeer (samen met kiezelalgen) op de vijverwand, de bodemgrond, de stenen en ook op de planten. De blauwalgen zijn geen echte algen, maar bacteriën (cyanobakterien), die echter licht als energiebron gebruiken en zo een tussenvorm tussen dier en plant vormen.
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It is also important to know that algae can absorb huge quantities of nutrients and store them in their cells. Thus many algae species can absorb and store more than the 100,000-fold of the concentrations in the water, some algae species even up to the 3.8 million-fold of the measurable concentration. The algae use this nutrient buffer for their unimpeded further growth when there are nutritional deficiencies. This is why we can frequently observe algae continuing to grow vigorously, even though we cannot detect any nutrients in the garden pond.
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Otra «especie de algas» son las denominadas algas verdeazuladas. Ellas forman unas acumulaciones babosas verdeazuladas o pardas (junto con las diatomeas) sobre las paredes del estanque, el sustrato, las piedras y también las plantas. En realidad, las algas verdeazuladas no son algas, sino bacterias (cianobacterias) que utilizan la luz como fuente de energía, por lo que son algo intermedio entre los animales y las plantas. Las algas verdeazuladas aparecen cuando hay una contaminación excesiva del agua y, p. ej., la materia orgánica (hojas) se pudre y se degrada.
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Un’altra “specie di alghe” è la cosiddetta alga azzurra. Questa forma delle viscide placche verdi-azzurre e brunastre (assieme alle diatomee) sulle pareti del laghetto, sui substrati, sulle pietre e anche sulle piante. Le alghe azzurre non sono propriamente alghe, ma batteri (cianobatteri), che utilizzano la luce come fonte di energia. Sono un misto tra un animale e una pianta, e compaiono in caso di inquinamento dell’acqua o quando delle sostanze organiche (foglie) marciscono e si decompongono.
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It is also important to know that algae can absorb huge quantities of nutrients and store them in their cells. Thus many algae species can absorb and store more than the 100,000-fold of the concentrations in the water, some algae species even up to the 3.8 million-fold of the measurable concentration. The algae use this nutrient buffer for their unimpeded further growth when there are nutritional deficiencies. This is why we can frequently observe algae continuing to grow vigorously, even though we cannot detect any nutrients in the garden pond.
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Another „algae species“ is the so-called „blue-green algae“. They form a smeary blue- green or brownish algae coating (together with diatoms) on pond walls, substrates, stones and even plants. The blue-green algae are not really algae but bacteria (cyanobacteria), which use the light as an energy source. They are something between animals and plants. The blue-green algae occur with high water pollution and when organic matter (leaves) decays and gets broken down.
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