The earth heats up, making the organisms smaller

As the temperature on the earth rises, many species will shrink in size, a new study says.

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Two scientists, Jennifer Sheridan and David Bickford of the National University of Singapore, have published research results on the relationship between global warming and the size of living organisms.

According to the researchers, if everything is small in the same scale, no problem will happen. For example, smaller plants will eat smaller fish. However, in reality, organisms do not react to the same warming, so they can change ecosystems and some species are in danger of extinction.

The size of polar bears is shrinking due to global warming.

This is not a new phenomenon. According to the fossil record, over the decades, during the earth's warming 56 million years ago, the sizes of bees, spiders, and beetles were all 50 to 75% smaller.

According to Livescience , the current miniaturization is expected to happen indirectly. For example, the concentration of acid in sea water increases, causing an increase in CO _{2 content} in the air. This makes it difficult for some organisms to develop calcium content in their shells or bones and shrunk in size.

Most animals on earth are cold-blooded animals and are directly affected by changes in temperature. These species need food to maintain their body size, otherwise they will be shrunk. For humans, this size change has a direct impact on the daily food source.

However, the two scientists also point out some exceptions in the study. In places of high latitude, climate change increases in the growing season of the organism and makes them larger. In addition, large animals may also be able to compensate for shrinking body size by expanding their diets. Except for the polar bear that is shrinking in the narrow sea ice.

"Global warming has a greater impact on small organisms. The size of the organism will continue to decline this century," wrote Sheridan and Bickford.