Why are so many species competitive on earth?
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Because there is only so much food and space available. Even trees compete for space and light in the forest. Not everthing born or sprouted can be sustained with the available resources and it's a matter or pure survival. Nature is very wasteful in this way. In some species, only 1 in 100,000 survive to maturity and produce offspring. 99,999 are food for something else. In other species, competition between it's own members decides who gets to produce progeny. Otherwise, the species would weaken, and eventually become extinct on its own, instead of progressing and being stronger than previous generations.
As much as I wish conflict was not part of the nature of life, the rules weren't written to please me.
Free as a bird, it's the next best thing to be. Free as a bird.
I agree with the previous answer. The survival of the fittest is and always will be the law of the land, no matter what species you are dealing with.
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Read up on Charles Darwin and his Book, Origin of the species. It's all in there.
Has to do with food shelter safty and sex. Maybe not in this order.
It's called "the food chain". Everything has to exist somewhere and eat something! (Even plants require water and nourishment)
actually, if you look at nature, you can see that the competion between species helps to keep the ecosystem in balance. If animals didn't compete for terriory, then there would be too many in areas where there shouldn't be and not enough where there should. Without outside interferance and healthy populations of native animals within it, an ecosystem can keep itself balanced indefinatelly. Survival of the fittest is simplifying very complex and intricate relationships between species and individual life forms, and in actuallity recent observations and genetic testing is showing that it isn't always the fittest or "alpha" memebers of a species that breed, and that if that was always the case, gene pools would suffer. So yes, while the weak get eaten, the idea of "fittest" is changing and subjective.
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