Effects of Extinction. natural cause of extinction A mass extinction is defined when Earth loses more than three quarters of its total estimated species in a geologically short timeframe. Each part depends directly or indirectly on the other parts. Fishing. Extinction of Animals: 6 Causes | Biosphere | Geography Climatic Heating and Cooling. Catastrophism and Natural Selection. Climate change is impacting the … We don’t know how many species there are, as evidenced by current estimates, which range from 3.6 million to over 100 million . Ecosystem A community of plants, animals, and other organisms that interact with each other and their physical environment, including things like rocks and weather. Environmental pollution (Death of marine bird due to oil pollution). They were caused by natural events such as comets and volcanic eruptions. Indigenous plants and animals are fully acclimated to their surroundings. The extinction of species (and larger groups) is closely tied to the process of natural selection and is thus a major component of progressive evolution. 3 It would be wrong to assume that species going extinct is out-of-line with what we would expect. Jurassic. Climate Change is caused by a number of things. Species extinction can cause an increase in the population of prey, which means in an ecosystem, the number of animals that were prey to another species increases drastically causing an imbalance in the ecosystem and vice versa. Extinction | National Geographic Society Learn vocabulary, terms, and more with flashcards, games, and other study tools. Natural Causes of Extinctions 1.