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.

    I don''t know why they grow like this and what to do when they see bats.

    Under special circumstances, the wrong response may be made.

    So that citizens can understand them objectively and rationally and carry out relevant popular science disenchantment, which is something that zoos should stand up and take the initiative to undertake.

    Most animals like bats have never received due attention, but their role in the ecosystem can not be replaced.

    In the future, an urban animal exhibition area can be built, and a bat museum can be built.

    But we have to wait until the epidemic is over. Now the environment is too sensitive.

    There are also bird bumps, stray cats and stray dogs, which are also common problems in cities.

    At present, these aspects are considered in the urban animal exhibition area. After visiting, tourists can think about how to get along with these animals, how to build a better ecological city and make their living environment better.

    ……

    The zoo is deserted!

    Originally, there were not many tourists. After receiving the notice from the superior, the park was closed in January.

    On official account and micro-blog, a notice has been issued. Tickets that have been purchased online can be refunded.

    Zoo fans also expressed understanding and support.

    "The tickets you have bought will not be refunded. Don''t starve the animals!"

    "When the garden opens, I''ll go to see the lovely little animals. It will get better."

    "Come on, get through the difficulties together! If you are short of money, remember to call us to donate."

    All kinds of messages are still very warm.

    The fund of Linhai zoo is still abundant. It has no problem for more than half a year. It is far from embarrassed to the extent that it needs donation support.

    However, the animals in the zoo are so lonely that they can''t see tourists!

    Like the project animals that often contact with tourists, kazilan, as the most beautiful Alpaca in the zoo, is very popular with tourists because of its white fur, big eyes and long eyelashes.

    Usually every day, a group of tourists gathered around it to take photos and feed it.

    Kazilan gives people the impression of being elegant and a lady. She seldom asks for other people''s food, because she is the first to be fed every day.

    Now he looks depressed. He doesn''t eat well. He has no appetite. He always looks in the direction of the zoo square.

    Why don''t tourists come now? Don''t they all like me very much?

    Because of the alpaca walking activities, other alpacas can go out for a walk from time to time, chew two mouthfuls of grass on the roadside grass, see the fresh scenery, and say hello to other animals. Now they can only be stuffy in the enclosure, which is also uncomfortable.

    More or less unhappy.

    Of course, some are completely unaffected. Brother Aotian still stares at the distance with a cool attitude every day and disdains his companions'' performance.

    If you don''t have a network, you can stand the Lord''s loneliness!