Chapter 716 (1/2)

This incident has undoubtedly brought many changes.

Because of social isolation measures, many people stay at home and do not go out for activities. The use of various means of transportation such as cars, buses and railways has also been greatly reduced. Within two months, the atmospheric particulate matter in the air has decreased significantly, including the emission of other pollutants.

The air is cleaner and there are fewer respiratory diseases.

The noise also decreased significantly. The birds seized the opportunity and began to sing heartily.

Some people found that they had never noticed that there were many birds in the city and had never heard birds singing. Now they can hear the loud singing of birds and the sound of their wings flying all day.

Many people talk on social media. Is it the illusion that birds are singing loudly recently, or that they are bored at home and have nothing else to do?

In fact, some scientists specialize in this matter.

Fang Ye used to give the example of people shouting friends across the street in a TV interview. If cars come and go, the sound will naturally increase.

This phenomenon has a name, called Lombard effect.

The researchers thought that if the environmental noise in the city decreased, would the singing of birds also decrease?

The results of the research are very unexpected. The bird's voice not only becomes lower, but also the bass becomes lower, the range is wider, and more information is transmitted. Some bass has never been recorded.

In terms of anthropomorphic rhetoric, their chirping songs become better and more romantic.

For example, in a noisy party, people can only be heard by shouting. Naturally, they are not in the mood to sing, but in a quiet garden, it is possible to convey profound discussion or euphemism.

Even if the songs are gentle, because the environment becomes quiet, these songs can spread over a wider distance, twice as long as usual.

Many people think that the singing of birds has become louder. In fact, it is not that they sing louder, but because they hear more birds and can hear four times as many birds as usual.

This year may be the first time in their lives that these birds can communicate without hoarseness.

Become quiet, in addition to land and sea.

Marine ecologists said that after the cruise ships stopped, the global marine noise immediately decreased, which was unprecedented in the past few decades.

The noise generated by ships and other marine vehicles will increase the stress hormone level of marine organisms, which will affect their reproductive success rate. Whales and dolphins even learn to stop singing when cargo ships approach and continue after the ships leave.

This year is probably the quietest and most pleasant time for these whales and dolphins in their life. They don't have to worry about being disturbed by ship noise, being chased, being disturbed by sonar and losing their way.

In the words of researchers, nature breathes a sigh of relief when we hold our breath.

Nature is an endless book, and most people think they are right after reading only a few pages. This lack of natural knowledge, superior attitude and various prejudices are also the reasons why people don't know how to treat nature well.

After such a disaster, it is also the best time for people to straighten out their attitude and understand nature.

After the TV interview, Fang ye had some ideas.

He has always planned to build an urban animal exhibition area, but the idea is not very mature and is slowly brewing.

The theme of the local animal exhibition area is the animals living in the land near the sea. It pays more attention to grasp the changes in animal history, how they used to be, what changes they have experienced, and how they are now, which leads people to think about their future.

The theme of the urban animal exhibition area is the relationship between wild animals and people in the city.

In fact, there are many wild animals in the city, which are very close to people, but people don't pay attention to them at ordinary times.

Like the bats this time, people know little about bats and have never noticed the existence of bats in cities.