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Comlurb removed 13.6 tonnes of dead fish from Lagoa Rodrigo de Freitas, southern Rio area on Thursday (20). This Friday (21), the work of withdrawal must continue.
On Thursday morning, a large amount of floating dead fish caught the attention of those pbading near the place. According to biologist Mario Moscatelli, fish mortality could be due to a number of factors.
"At the beginning you have a sewer discharge, there is the cbad of Alah 's garden which is silted and there is no exchange of water. water and this torch is connected.I have already entered here in the water and the water looks like a bath of water.The fish does not contain oxygen and the animal is dying, "said the biologist.
Biologist David Zee pointed out that the risk of death was imminent due to excessive heat. According to him, the polluted waters of the lagoon serve as food for the accelerated and abnormal growth of microalgae and the increase in hours of insolation further accelerates this process.
According to the biologist, the El Niño weather phenomenon favors high temperatures in southeastern Brazil and the blockade of cold-water entrances leaves the coastal waters of Rio de Janeiro stagnant. The biologist also said the weak renewal of the waters of Lagoa Rodrigo de Freitas further aggravates the situation.
Climatic conditions can hurt
Moscatelli states that the situation of Lagoa Rodrigo de Freitas has improved in recent years, but that we are in another climatic condition.
"We must refresh ourselves and avoid sewage, avoid siltation of the Garden of Alah channel and understand what is happening each year, warm up and act directly on the ecosystem." Lagoa is a naturally fragile ecosystem If we do not modernize, it will be a common practice every summer, "said Moscatelli.
The state of conservation of Lagoa is critical
According to the latest environmental management report of Lagoa, the state of conservation of aquatic life is critical, with oxygen levels close to 0.
According to the bulletin, the water of the lagoon is also close to the water. state of alert, causing floods such as those occurred near the helipad.The water is already reaching the bike path around the lagoon.
The Secretariat for Conservation and l 39; The environment noted in a note that environmental agencies involved in monitoring the Rodrigo de Freitas Lagoon have been on alert since the last hour, when oxygen levels began to fall. he maintained the valves of u Alah Garden channel open since last Friday.
Still according to the Secretariat, the death of fish is due to the proliferation of cyanobacteria and phytoplankton, present in the sensitive ecosystem of the lagoon, which have a rapid life cycle, proliferate at high temperatures and consume of oxygen.
Dead fish in Lagoa Rodrigo de Freitas – Photo: Marcos Serra Lima / G1
Dead fish in the lagoon Rodrigo de Freitas – Photo: Marcos Serra Lima / G1
Dead fish in Lagoa Rodrigo de Freitas – Photo: Marcos Serra Lima / G1
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