More than 1 million species of insects on Earth but this is the reason they are

Although accounting for 70% of the surface of the Earth, but the insects living in the sea are extremely small, why?

According to the survey, more than 1 million species of insects exist on Earth discovered so far. This demonstrates the enormous biodiversity of this invertebrate industry.

More than 1 million insects exist on Earth.

However, there are only about . 100 species of insects living entirely in the water , accounting for a very small percentage of the whole industry. The difference between these two underwater and terrestrial habitats has made scientists quite a headache when they find the answer.

"Although there are a lot of insects that live in water, but to live completely in the sea, the numbers are too small," said Giffishs, an oceanographer at the University of Cape Town.

"According to the research, we have found two main reasons for answering this conundrum".

The sea - the environment is so volatile

Almost all insects live in the sea, they only live in this environment in the first phase of life.

"In the period from eggs to larvae, these invertebrates can freely live in the water environment. However, in adulthood, finding food and partners will be very difficult in the region. "The sea is vast when they are so small," said Picker, an entomologist at the University of Cape Town.

Parasitic wasps - rare insects that can live in the sea at an adult stage.

That's not to mention, living clinging to non-fixed plants such as algae and algae makes these little creatures become fat prey for larger creatures.

In addition, erratic tidal factors , as well as increasingly severe storms due to climate change, contribute to their survival.

Only the wasps survive in the marine environment, when they are completely parasitic in the spiders' eggs.

"In a safe environment like sea spider eggs, hornets have enough conditions to mature without any changes. This is completely different from the turbulent sea outside," Simon van Noort - An entomologist from Iziko Museum, South Africa emphasized.

Oxygen supply is not guaranteed

Unlike other aquatic species, insects do not have gills, nor are respiratory systems sufficient. Even their blood cannot transport oxygen to bring this essential component throughout the body's cells.

This invertebrate oxygen exchange occurs only in the direct opening of the skin (spiracles) to supply cells, but is extremely slow.

The spiracles have openings directly on the body, making it possible for insects to breathe.

Therefore, with a low-density environment such as the sea (accounting for only about 0.00015% in seawater), insects are really difficult to survive completely under water like other aquatic animals. .

In contrast, the land environment is much better able to provide (concentrations up to 20% in the air), in accordance with the respiratory system of this animal industry.

Of course, there will be many other factors that affect the "priority" of living on more land of insects.

And scientists are still actively searching for the remaining puzzle pieces to answer this much-mysterious question.