* when population are high and Natural Resources are comparably rare. * when natural resources are depleted as in a famine or drought.
Charles Darwin Theory of natural selection
Competition is different species' struggles to obtain some common necessity, whether it be habitat, prey, etc, within a population. Because environments can only support a certain amount of organisms, these organisms must compete for the resources. This is good for populations because it helps to control reproduction. If an animal is reproducing too fast, for example, another animal may compete with it for food and eventually kill enough to control the overabundance.
you
Animal Atlas - 2004 Animal Populations 8-7 was released on: USA: 24 October 2011
A lot.
Rats compete with us because rats eat our grain crops.
Trees
dogs, cats, and cows
Larry M. Hunt has written: 'Energy flow in animal populations' -- subject(s): Animal populations
Culling is used as a way to manage animal populations. If the populations in a confined area are left to their vices, they will have to fight and compete for lesser and lesser food and water resources. Letting nature take it's course doesn't work because the animals can't just move on and find greener pastures when things get crowded. They would literally drink and eat their populations to death.
what animal does a tarantula cmpete with
They effect animal populations because...... They do! if this ain't the answer you want, well then...... DEAL WITH IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!