Why is global warming causing more and more rats?

Experts say global warming.

As a result, there are more and more rats, and it may become a world of rats in the future.

Scientists warn that global warming and urbanization are also bringing about an unintended consequence of a surge in the global rat population. If there is a battle between humans and rats, humanity is losing ground and the situation is going to get worse. Rats can cause a variety of problems for humans, including spreading diseases and affecting food safety.

and pose a threat to human architecture, etc. The city of Chicago, USA, is civilized with ** and sports.

Now it has another title and has become the "rat capital" of the United States.

Indonesia.

Rice production has been reduced by 17 percent as a result of rat infestations, and in the United States alone, rat-inflicted damage to buildings is as high as $19 billion. The United Nations estimates that by 2050, nearly 70% of the world's population will live in cities, and if effective measures are not taken, the rodent problem will worsen. Increased urbanization means more food and habitat for rats, which have chosen to live next to humans for thousands of years in order to share their food waste.

What is quite worrying is that climate change, rising temperatures, will prolong the reproductive period of mice.

According to experts, a pair of rats can breed up to 1,250 mice in 12 months, and the rats are so fertile that it is impossible for humans to completely eradicate them. If some of the rats are exterminated, the remaining rats will recover quickly and grow stronger. In addition to strong reproductive ability, mice have a more developed and sensitive sense of smell, taste, and auditory system than humans, and the olfactory bulb of mice is very developed, genetic studies have shown that mice have about 1300 olfactory receptor genes, of which 1100 play a role, while humans have about 1000 olfactory receptor genes, but only 350 play a role.

The sense of taste of rats is also well developed, house mice.

Able to taste 1 in 4 million of the war-killing contained in food. As for hearing, rats can hear even 100 kilohertz and are able to emit ultrasound to communicate, while humans have a hearing range of between 2 and 20 kilohertz. In other words, compared to mice, the human sense of smell, taste and hearing has been completely abused for several streets.

Rats are numerous and cunning, and they have caused much more harm to humans than they imagined, and experts estimate that the death caused by rats in the past 1,000 years is far greater than all the wars combined.

For example, the Black Death in Europe in the 14th century.

Like the plague, it is caused by a species called Yersinia pestis.

caused by bacteria. Rats are no longer afraid of humans, and humans know very little about them, the University of Greenwich in London.

Ecology professor Beyman said: "In fact, the best way is often the most basic way, and if the waste storage and sanitation problems are solved, it will have a profound impact on rodent control. Parsons.

Indicates that if there is less food, the rats will kill each other, and if everyone takes the food waste away, it will be more effective not to throw it in the public trash can!

This is because a rising climate will make the rats have a longer reproductive period. Originally, the reproduction rate of mice is very fast, and the prolongation of the reproductive period makes the reproduction speed of mice faster.

Because after the weather gets warmer. Various bacteria also multiply. At this time, it is very suitable for the survival conditions of mice. So there will be more and more rats.

Rats are a kind of rodents that we are more common in life, and they belong to the existence of particularly strong reproductive ability and survival ability among mammals, whether it is indoor or outdoor, we can see their traces. And because the rats in the house will gnaw on our food, we are also very distressed and annoying about this pest.

More importantly, rats are infested in sewers, toilets and other places with bacteria all year round, so they are also easy to spread pathogenic bacteria, such as the "plague" that once occurred is a terrible virus, so it is also important to do a good job of rodent prevention. However, according to the June 5** road mentioned in "Sina Technology", it turns out that the rats with particularly strong adaptability also face some difficulties.

North American deer rats are getting smaller and smaller.

According to the foreign ** newspaper changed the road, a research report published in the journal "Scientific Reports", said the survival of North American deer rats in the past 70 years, from this report, we will see that over time, most of the deer and mice have become smaller, for the reasons, scientists are conducting in-depth analysis.

The <> deer rat is a small rodent found in a variety of environments, ranging from the southward regions of Alaska and northern Canada to the western part of Barnabas, with prominent eyes, large ears, a weight of 15-110 grams, and a body length of 8-17 centimeters.

For example, the basic coat color of the mountain forest is gray to light yellow or black, while the coat color of the deer and mice in the desert or grassland is light.

Why study their size?

Deer rats are a common mammal in the United States, and one of the most complete and detailed rodents in North American museums, and by studying their size, we can get some clues that we haven't noticed before, such as whether the size of mammals is affected by climate warming, after all, animals tend to react faster than humans in this regard.

According to Bergman's law, species will grow larger in cold climates and smaller in warmer climates.

Therefore, scientists are worried that as the global warming problem of the modern earth becomes more and more serious, will it make deer and mice appear smaller.

The smaller size of deer and rat is related to many aspects.

Studies have found that the smaller size of deer and mice may not be directly related to the climate, and the root cause may be because deer and mice living in urban areas have to withstand warmer environments, and at the same time, they need to avoid humans, so it is more advantageous to be smaller. In rural areas, although not as warm as urban areas, there is less food for humans, so the deer and rat pies that lack food cannot grow larger.

Although the researchers have not been able to find that the deer and rat body dust is related to the climate, they have found that the weight of the deer and mice has generally decreased, and the factors behind this are still being searched, so let's stay tuned.

There are two main reasons for the gradual reduction of the size of rats, namely global warming and urbanization caused by increasing population density.

1. Urbanization.

With the advancement of urbanization, the gaps in the city are getting smaller and smaller, and many rat populations have undergone a series of changes in the past few decades in order to adapt to this change, the biggest of which is the gradual reduction in size. In fact, this situation is very normal, according to Darwin's evolutionary reasoning, due to the gradual shrinking of the gaps in the city, the smaller rats can get more resources, so that the survival of the fittest produces natural selection.

2. Changes in climate and environment.

In contrast to the fact that species are getting larger in cold climates, not only rats, but also many wild animals are getting smaller every year as the world warms. Recently, foreign scientists have followed up on deer and mice, and studies have shown that with the warming of the climate caused by human activities, the size of deer and mice is really getting smaller year by year. The main reason for this is that larger animals release heat from a smaller area of the body surface, so they are more suitable for living in cold regions and adapting to the increasingly hot global warming climate.

For example, the most common deer rat is that deer rats that live in cold regions tend to be longer and have a larger surface area, and the climate temperature in cities is generally warmer than in the countryside, so in order to reduce body temperature, deer and mice in cities are also smaller than those in rural areas. There is more garbage in the city, and theoretically, the deer and mice in the city should have better access to food and use this advantage to grow larger, but on the contrary, the deer and mice in the city are getting smaller and smaller, which also confirms the above conjecture, the small size is better for heat dissipation, and as the population density increases, the smaller deer and rat can more easily avoid human pursuit.

Prima facie, the smaller size of rats is indeed directly related to climate change and global warming, but the evolution of species is generally affected by many aspects, and a lot of big data is needed to support a thorough analysis, and conclusions cannot be drawn rashly.

I think it has something to do with the current urbanization and climate change, because urbanization means that the bigger the rats, the easier it is to be found and killed, so they are getting smaller and smaller.

Yes, studies have shown that rats are getting smaller, and this phenomenon is related to climate change and the living environment of urban populations.

There is a certain relationship, because now that the urban environment is getting better, then the growth environment of the rats will become very poor, so food is more difficult for them.