environmental science chapter 1 section 3
TRANSCRIPT
Environmental Science
Chapter 1 Section 3
Interactions
All living things interact with their environment both biotic and abiotic
Most living things produce more offspring than can survive
Limiting Factors
Most living things produce more offspring than can survivePopulations cannot grow indefinitelyThe population can only be as big as the resources will allowThe environment contains a finite amount of food, water, living spaceThese factors are limiting factors because any one of these factors can limit the size of the population
Carrying Capacity
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.
Interactions Among Organisms
Four main ways that species interact with one another Competition Predator/prey Symbiosis coevolution
Competition
Can occur within populations and within communities
Organisms try to use the same resources
Coevolution
Long-term change that takes place in two species because of their interactions with one another.
Predator/Prey
Prey - organism that gets eaten
Predator – organism that eats the prey
Both predators and prey adapt in response to one another in order to survive
Symbiosis
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