Download Chapter 48: Populations and Communities

Chapter 48: Populations and Communities
Section 3: Interactions Within and Between Communities
Interactions Within and Between Communities

After populations, the next larger biological units are
___________________________
o A community consists of all the populations of organisms living in a
given area

Populations in communities interact with one another in many ways

Example:
o Plant species compete for ________________, _____________________,
and ________________________. At the same time, some plants have
evolved ____________________________________________________.
Herbivores compete with one another for _________________ and
__________________. These herbivores may have evolved
___________________________________ against the plant species.
While this is going on, carnivores are ____________________________
__________________________
Symbiosis

There are several relationships that play an important role in nature
o _____________________________

____________________________________

____________________________

____________________________

____________________________
Parasitism

One species _____________________ and the other is _____________________

Example:
o Tapeworm feeding off of nutrients in the digestive tract of an organism
Commensalism

One member _______________________ and the other is
__________________________

Example:
o ___________________ live within the stinging tentacles of sea
anemones.
o The shrimp are ____________________________ by the anemone’s
poison
o As a result, the shrimp ________________________________ from
predators that cannot tolerate the anemone’s stings
o Anemones are not harmed by shrimp living on them, but they are not
helped either
Mutualism

Two species live together in such a way that _____________________________
______________________

Example:
o Clownfish benefit from living within the stinging tentacles of the sea
anemone in the same way shrimp do
o However, clownfish also help the anemones by chasing away several
species of anemone-eating fish
Interactions Among Ecosystems

Not only do populations and communities interact, ecosystems also interact with
one another in many ways

Nearly every ecosystem is _____________________________, either directly or
indirectly, with other ecosystems