Why are there so many jellyfish? And why is it bad that there are so many?

Human intervention in all Earth's ecosystems does not always entail the extinction of species, sometimes it has the opposite effect, the multiplication and expansion of a particular species, generally at the expense of others.

This would be the case of jellyfish, also known as aguamalas , aguavivas and sea tears , and that have become a Annoyance for tourists who come to all spas.

Anemones are one of the oldest animals that still move on the face of the Earth , where they have been present for about 700 million years, and with representation in all the seas, from the Arctic to the equatorial regions.In recent years it began to be noticed that their number was increasing, and in even more recent times it began or to be considered a real problem.

Causes

There are several causes that have led to this "mega outcrop" of jellyfish throughout the world, although all have the usual suspect in common : the human being.The increase in jellyfish would be linked to the following factors.

Pollution of the seas with fertilizers and hydrocarbons. Fertilizers that reach the sea through rivers and rivers.Frequent oil spills would favor the massive growth of bacteria from which jellyfish feed.This effect could be seen in Alaska after the historic Exxon Valdez disaster.By eliminating their natural predators, such as tuna or sharks, jellyfish have proliferated and their consumption of plankton has also increased, decreasing this food for other species. Climate change. The warming of the seas has favored the reproduction of several species of jellyfish Y greater presence on the beaches of the world.

Effects

The proliferation of jellyfish has begun to create several kinds of problems beyond the increase in bites and “burns” of banistas.For desalination plants of Japan, Africa and the Middle East have become a headache and, as we mentioned before, by increasing their plankton consumption, they could be altering the marine food chain by decreasing the food of small fish.

Why are there so many jellyfish? And why is it bad that there are so many?

But the most harmful effect to which jellyfish overpopulation could be associated has been detected in recent research, and would have to do with the acidification of the seas and global warming .

Apparently the marine bacteria that are responsible for processing the remains of living things that descend to the seabed would not be able to process the increasing jellyfish biomass, and this carbon accumulation would be in turn contributing to the acidification of the sea.

On the other hand, as these bacteria increased to deal with the surplus of “aguamalas”, would increase also the carbon dioxide emissions of these animals , thus contributing to the greenhouse effect, and warming of the seas.With which the jellyfish would act as the cause and effect of climate change.

Why are there so many jellyfish? And why is it bad that there are so many?

Therefore, the next time you see numerous" sea tears "on a beach, you may be witnessing the crying caused by the global imbalance.

Discover also 5 places in the world that you can't believe exist!

Images: Matteo Tarenghi , Hubert Figuiere , Nearly-Normal , Jason Pratt

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