All living things interact with their environment, both biotic and abiotic Most living things produce more offspring than can survive
Most living things produce more offspring than can survive Populations cannot grow indefinitely The population can only be as big as the resources will allow The environment contains a finite amount of food, water, living space These factors are limiting factors because any one of these factors can limit the size of the population
The largest population that can be supported in a given environment When a population grows larger than its carrying capacity, limiting factors in the environment cause the population to decrease.
Four main ways that species interact with one another Competition Coevolution Predator/Prey Symbiosis
Can occur within populations and within communities Organisms try to use the same resources
Long-term change that takes place in two species because of their interactions with one another.
Prey - organism that gets eaten Predator – organism that eats the prey Both predators and prey evolve in response to one another in order to survive
Close long-term relationship between different species in which at least one species benefits 3 types mutualism – both species benefits – ex coral and algae commensalism – one species benefits, the other is unaffected – ex sharks and remoras Parasitism – one species benefits, the other is harmed Parasite – the organism that benefits Host – the organism that is harmed Ex- deer tick is parasite, deer is host