What is the most fundamental cause of biological extinction?

Upheaval in the environment.

For example, the extinction of the dinosaurs 64 million years ago was caused by an asteroid with a diameter of 10 kilometers hitting the earth, causing drastic changes in the earth's environment. Of course, this impact wiped out 80% of all life on Earth, including dinosaurs.

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Not all places are full of spring flowers, and the four seasons are distinct.

Hundreds of millions of years ago, at the end of the Permian, one of the worst extinctions ever recorded, led to the disappearance of almost 70 percent of the world's terrestrial vertebrates and 96 percent of marine life.

Warming global temperatures, rapid population growth, and environmental degradation are causing the planet to experience its sixth mass extinction in history. At the Fourth International Cambrian Congress, well-known paleontologists from many countries expressed the above views. They believe that the current disappearance of species is strikingly similar to the extinction event in the history of the earth, and unlike in the past, humans played the role of "chief director" in this extinction event.

According to the 2005 Global Species Survey published by the International Union for the Conservation of Natural Resources, more species are on the verge of extinction than ever before.

According to scientists, the main cause of species extinction today is the widespread loss of habitat and environmental destruction caused by human activities. Humanity is in an absolute "hegemon" position on the current planet, and the consideration of any event is self-centered, which will inevitably affect the development of other organisms, and the monotony of biodiversity is inevitable.

Experts from the Food and Agriculture Organization of the United Nations (FAO) said in a recent report that more than 1,000 domestic animal breeds have gone extinct worldwide in the past 100 years. If measures are not taken, humanity will lose another 2,000 livestock and poultry breeds within 20 years.

Experts point out that biodiversity is irreplaceable and that reduced diversity of domesticated animals will make them more vulnerable to environmental and climate change, as well as new disease epidemics. The extinction of species destroys the biological chain and will inevitably affect human beings.

The jury is still out.

Mass extinction refers to large-scale mass extinction, and biological extinction is also called extinction. Entire families, orders, and even entire classes of organisms have completely disappeared in a very short period of time, or only a very small number remain. In the process of cluster extinction, it is often the case that all species in the entire taxa, regardless of their position in the ecosystem, are not spared, and often many different groups of organisms go extinct together, but there are always other groups that survive, and some groups are born or begin to flourish.

Large-scale mass extinctions have a certain periodicity, occurring once every 62 million years, but cluster extinctions have the greatest impact on animals, while mass extinctions of terrestrial plants are not as significant as those of animals.

According to a recent study published in the journal Science, an international team of scientists warns that the extinction and decline of animals is the prelude to the sixth mass extinction on Earth. Since 1500, more than 320 terrestrial vertebrate species have become extinct. The remaining species also showed an average decline of 25 percent, a situation that is very similar in invertebrates.

While previous mass extinctions were caused by natural changes in the Earth or catastrophic asteroid impacts, the extinction of life today is very much related to human behavior. This state of affairs was named by the study's lead author, Rodolfo Dirzo, a professor of biology at Stanford University, as the era of "human loss of symhabitat."

Cyclical causes of mass extinctions on Earth**.

The growth of human beings leads to changes in the environment. Of course, environmental changes are not necessarily caused by human activities, but may be caused by changes in the Earth's interior. Millions of years ago, there was no human activity, which would also cause climate change and extinction.