Abstract
To analyze the reasons for the extinction of dinosaurs by applying the elimination methods, to exclude the factors that could not cause the worldwide extinction of the dinosaurs. At last obtain a conclusion that because the Ice Age had come on the Earth and caused the changing of climate that it had been becoming cold and arid from warmth and moist, and caused the phyto-group had been changing, which the Pteridophyte and gymnosperm groups fell off or died out, but the angiosperm groups had been developing and expanding. The characters of photosynthesis of producers of the biosphere had been becoming to the seasonal and regional from the perennial and global, the total of oxygen had reduced sharply in the atmosphere, the density of oxygen had declined, and finally affected the breath of dinosaurs, and led to the extinction of dinosaurs. And as the main producers of biosphere, the pteridophyte and gymnosperm groups had fallen off or died out were the mainly reasons for the creature’s extinction at the later of the Cretaceous period.
Highlights
The reasons for the extinction of the dinosaurs, a number of scholars proposed many opinions, such as the volcanic eruption, food poisoning, the striking of asteroids, and so on
3.1 Results In summary, because of the Ice Age had come on the Earth, and it had changed from warm and moist to cold and dry, which had affected the growth and reproduction of ferns and some thermophilic gymnosperms, and caused them to decline or extinction
During the decay or extinction of ferns and thermophilic gymnosperms, and the development and expanding of angiosperms, the characters of the photosynthesis of Producers in the biosphere had been becoming to the seasonal and regional from the perennial and global, the total of oxygen produced by producers had reduced sharply, the density of oxygen had declined, and affected the breath of dinosaur, and caused the global extinction of dinosaur
Summary
The reasons for the extinction of the dinosaurs, a number of scholars proposed many opinions, such as the volcanic eruption, food poisoning, the striking of asteroids, and so on. The argues had exceeded the scopes of biology and paleontology and extended the astrophysics, geology, marine science, etc. Almost nobody to analyze it on the angle of ecological basic knowledge, almost no one to consider the living state of the producers of biosphere. This article jumps off the thinking set of the forefathers, and thinks and speculates deeply the reasons for extinction of dinosaurs from another perspective, and leads the people’s view to a different realm
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