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A probable outbreak of cyanobacteria is killing hundreds of birds in several lagoons around Doñana (ZEPA-Doñana).
Although the data from the necropsies of the birds are being investigated, because cyanobacteria are a type of microscopic algae that also tend to proliferate in environments contaminated by wastewater and with excess fertilizers , which produces the so-called eutrophication process.
For the moment, dead birds have appeared in the Dehesa de Abajo (ZEPA-Doñana) but the search for remains of winged species has been extended to the areas of Veta la Palma and the wide network of peridunal lagoons to Matalascañas, Almonte and El Dew .
It is a recurring phenomenon in the Biosphere Reserve and its natural environment and which is being repeated at the moment fueled by high temperatures , the zero renewal of the waters and the little wind that contributes to the movement of stagnant waters and helps slow the growth of cyanobacteria.
These cyanobacteria have been growing during this summer in this area of Doñana and generating an environment of toxicity (anoxia) that is killing birds, many of them protected species. Found copies of teals pardillas, Malvasia, coots and storks , among others.
However, the Environment authorities are investigating and analyzing the remains of the dead birds to document the exact cause of the outbreak.
The fact that cyanobacteria are a type of microscopic algae that tend to proliferate in environments contaminated by sewage and excess fertilizers , which produces the so-called eutrophication process, makes it necessary to rule out other causes of origin.
Courtesy of diariodehuelva.es
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