Mouse witnesses are rising in New York City
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As the planet warmed up, many pests have been predicted for a long time. And now, studying 16 major cities has shown that rats are growing the most rapidly in areas where the average temperature is fastest.
It is very difficult to estimate the number of rats in the city, so Jonathan Richardson Richmond University in Virginia and his colleagues did not try this. Instead, they looked at how the population was changing by looking at the number of complaints about rats recorded by the city.
In the United States, this information is often released, and the team could get some data from some outside the United States by contacting the city officials. Researchers included cities in their research only if the data for at least seven years was available and the method of collecting them had not been changed. As a result, they left 13 US cities as well as Tokyo, Amsterdam and Toronto.
Their analysis has decreased in New Orleans, Kentucky and Louisville in Tokyo, stable in Dallas and St. Louis, rising in other 11 cities, Washington DC, San Francisco, Toronto, It suggests that it is growing most rapidly in New York and New York. Amsterdam.
Richardson and his colleagues have seen several factors that may explain the trend. They discovered that the strongest link was a relationship with the average temperature rise in the past century. The next strongest link continued to be urbanized from satellite photos and followed by the density. The city GDP did not show a link to the rat tendency.
In cold cities, researchers say it makes sense that the rise in temperature leads to an increase in population, as the number of rats decreases during the winter and peaks in summer. 。 The fact that there are many rats means that people suffering from mouse intermediary diseases, such as leptus spirasia, which are also known as wild disease, are at a high risk.
The survey shows that the city needs to do more to control rats as the planet warms up, and blocking their food is the only most important scale. Richardson says there.
“Fixing food waste so that access to rats is not accessible is an approach that has the biggest impact on rat control,” he says. “The pilot in New York City is finally looking at a pilot in a specific area and has a dent that can be measured in the number of rats.”
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