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
