4.2 the niche

what is a niche

a range of physical and biological conditions in which a species live and the way the species obtains the resources it needs to survive and reproduce

interspecific

between members of a different species

mutualism

both species benefit

a barnacle living on a whales skin

commensalism

members of the same species tend to ___ resources instead of competing over them

divide

give an example of resources a squirrel might need

food, water, habitat

a keystone species is one that

helps stabilize the populations of other species in the community

a cow eating grass is an example of

herbivory

competition between members of the same species is know as ______ competition

intraspectic

what are the biological aspects of a niche

involve the biotic factors it requires for survival, such as when and how it reproduces, the food it eats, and the way in which it obtains that food.

symbiosis

living together

a bee eating a flowers nectar and picking up the flowers pollen

mutualism

these different warbler species live in the same area. one species feeds at the top of the trees, the second species feeds in the middle part of the tree, and the third species feeds at the bottom of the tree. Do all three species occupy the same niche? Explain.

no they divide up their habitat so that none of the species have the exact same niche

parasitism

one species benefits the other is harmed

commensalism

one species benefits the other is neither helped or harmed

if two species of bacteria are grown in the same culture, one species will always ______ the other

outcompete

a tapeworm living in a persons intestines

parasitism

a tick living on the body of a deer

parasitism

A lion eating a zebra is an example of

predation

competition occurs when organisms attempt to use the same

resources

the competitive exclusion principal states that no two ____ can occupy the same niche in the same culture, one species will always out compete the other

species

competitive exclusion principal

states that no two species can occupy exactly the same niche in exactly the same habitat at exactly the same time

what is tolerance

the ability to survive and reproduce under a certain range of environmental circumstances

habitat

the general place where organisms live

how do keystone species illustrate the interdependence of organisms living in a community?

they keep populations in check