Environmental Chapter 1 Section 3

All living things interact with their environment, both biotic and abiotic

Most living things produce more offspring than can survive

 

Interactions

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

Limiting Factors

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.

Carrying Capacity

Four main ways that species interact with one another

Competition Coevolution Predator/Prey Symbiosis

Interactions Among Organisms

Can occur within populations and within communities

Organisms try to use the same resources

Competition

Long-term change that takes place in two species because of their interactions with one another.

Coevolution

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

Predator/Prey

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 

Symbiosis