une algue marine toxique menace la faune californienne.
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SAN FRANCISCO – 2 juin 2024 –
En Californie, la présence de la Pseudo-nitzschia australis, une algue marine toxique, inquiète les scientifiques. Qui est responsable de ce phénomène,qu’est-ce qui se passe,où cela se passe-t-il,quand et pourquoi ? Cette micro-algue libère une toxine qui affecte les animaux marins,notamment les lions de mer,et pourrait avoir des conséquences plus larges. Découvrez les détails de cette menace, et ses potentielles répercutions sur l’écosystème.
An invisible but very powerful algae is altering the balance of the sea, leaving disturbing signs along the coast.
The oceans are like a huge gear, full of tiny wheels that must turn perfectly. A detail is enough out of place, even a small variation, and everything He risks going by tilt and change inexorably.
Yes, because marine nature has its ancient rhythms, and when something changes too quickly … well, they happen Things you don’t expect. Sometimes strange signs come from the sea. Hottest currents than usual, animals that behave in a bizarre way, sudden blooms of microscopic organisms.
Usually, they are passenger phenomena, but other times – more rarely – they trigger a chain reaction that leaves their mark. It is in those moments that the sea reminds us how much it can be unpredictable. In recent times, something has started not to return.
Nothing visible at first sight, no obvious alarms. However, those who work closely with the sea – biologists, fishermen, enthusiasts – began to notice behaviors out of the ordinary. These are not invasions of alien species or sharks under the coast, no … it is something more strange. Quiet, but also more disturbing.
Many possible risks
What is happening starts from such a tiny creature as to be invisible, but its effects are gigantic. We are talking about a natural phenomenon yes, but also rather rare, which is changing the way certain animals live, react, move. In some cases, it is making them unrecognizable.
And the question does not stop at animals. If molluscs and seafood are contaminated by the toxic alga, we too could be careful. THE’amnesic poisoning from molluscs – Yes, it’s called just like that – it can cause even serious neurological disorders, such as loss of memory, mental confusion, and in some cases … permanent damage.
What is going on on the beaches
Along the California coast, a toxic alga with a very complicated name has sprung out – Pseudo-nitzschia australis – who is making himself talk about himself, as reported by free technology. This microalga thrives in the hottest waters (thanks climate changes …) and releases a very dangerous substance: thehomeic acid. It is a powerful neurotoxin that accumulates in fish and molluscs, and from there it ends … well, in the marine lions, which are ghiles.
The problem is that, once ingested, this toxin begins to do serious damage to the brain of animals. Marine lions begin to behave strange, aggressively, totally out of their usual. Someone saw them attack also swimmers. Yes, just like that: rare episodes, fortunately, but disturbing enough to trigger alarm bells between experts and local authorities. So far no recent human cases, fortunately, but the controls in California have become much more tight.
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