Transcript Ecology - science

Ecology
Thinking Questions
Compare and contrast a
population and a community.
Compare and contrast a population
and a community.
A community consists of all the populations
in an ecosystem and therefore has many
different species in it. A population
consists of all the members of one—and
only one—species that live in an
ecosystem
Compare and contrast a
community and an ecosystem
Compare and contrast a
community and an ecosystem
All the living organisms—the populations of
all the species that live in an area—make
up a community. An ecosystem includes
the nonliving factors as well as the living
organisms.
If corn is planted at one-foot
intervals, what is the population
density of a fully planted acre of
corn? Note: One acre equals
43,560 square feet.
If corn is planted at one-foot intervals,
what is the population density of a fully
planted acre of corn? Note: One acre
equals 43,560 square feet.
43,560 plants per acre
Raccoons live in an old, dead tree
in the Rosarios' backyard. Every
night, the raccoons rummage
through the garbage cans in the
neighborhood, knocking them
over in search of discarded
human food. Describe the habitat
and the niche of these raccoons.
Describe the habitat and the
niche of these raccoons.
The raccoons' habitat is the old, dead tree.
The niche involves knocking over garbage
cans and getting food that humans
consider garbage.
The clown fish lives among the
stinging tentacles of the sea
anemone but never gets stung.
The sea anemone protects the
clown fish from predators, and the
clown fish helps bring food to the
carnivorous sea anemone. What
kind of relationship is this?
What kind of relationship is this?
Mutualism – both organisms benefit
Explain why cooperation is a part
of an organism's niche rather
than its habitat.
Explain why cooperation is a part of
an organism's niche rather than its
habitat.
An organism's habitat is where it lives: its
niche is how it survives. Cooperation is
part of the way an organism survives and
so is part of its niche
Explain how competition can
limit population size.
Explain how competition can limit
population size.
Competition occurs when two or more
organisms seek the same resource at the
same time. If a resource is in short supply,
not every organism will be able to get all
that it needs for growth or survival. Some
organisms in the population may leave the
area; others may not survive.
Why must a producer be at
the base of every food chain?
Why must a producer be at the
base of every food chain?
Producers are the only organisms that can
make the energy-rich substances that are
used for food. The second step in a food
chain must be a consumer that eats the
producer. Consumer eat producers or
other consumers that have eaten
producers.
What kind of succession occurs
when lava covers the land?
What kind of succession occurs
when lava covers the land?
Primary succession because the land area
is newly created, without any soil
Compare a climax community
to a pioneer species.
Compare a climax community to a
pioneer species.
A climax community is complex and stable
over time. A pioneer community is a new
and changing environment.
What is the connection between
climate and climax communities?
What is the connection between
climate and climax communities?
Areas with similar climates produce similar
climax communities.
What changes are shown in
this diagram?
What type of succession is
demonstrated?
What changes are shown in this
diagram?
• The pond is beginning to fill in.
• There is very little water left
• No aquatic life is visible.
Secondary succession is shown.