Transcript Ecology PowerPoint


Ecology: The study of
the _____ of
organisms with one
another and with
their _____.

Intro to Ecology (3:07)
Ecosystems are
very complex.
 They could contain
hundreds or
thousands of
interacting _____.
 Understanding
their _____ can be
beneficial for all
organisms within
that _____.

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Understanding
ecosystems by asking
two questions:

Where does the _____ for
organisms come from?

Where do _____ and
inorganic substances
come from for organisms?
Species – an individual
(harlequin poison dart frog)
Population – group of same
_____ living in the same _____
Community – groups of
different _____ living in an
area (pond community)
Ecosystem – communities
plus the _____ parts; first
level to study nonliving parts
Biome – groups of _____ put
ogether in a large geographic
area; same _____ and similar
dominant _____
Biosphere – the _____ and
upper _____ where life can
be found

Autotrophs/Producers
The organisms that
take in _____ from
their surroundings
(light, inorganic
chemicals) and store it
in complex _____.
 P_____
 A_____
 B_____
Heterotrophs/Consumers
Organisms that obtain
their _____ by consuming
other _____
A_____
P_____
F_____
B_____
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Decomposers
Organisms that obtain
_____ by consuming
organic _____ (feces,
urine, dead plants and
animals)
 F_____
 B_____
Herbivores: _____
eaters
 Usually found at the
_____ trophic level.

Carnivores: _____ eaters
Usually found at the
_____ trophic level or
above.

Omnivores:
organisms that
eat both _____
and _____
Detritovores:
organisms that eat
dead and decaying
_____ _____
Energy pyramid
_____ of energy is
passed on
through each
_____ _____;
remaining _____
released as _____
or used by
organism
Biomass pyramid:
total amount of _____
_____ within a _____
_____; in this
example, 10,000 g/m2
of _____ are required
to support only 10
g/m2 of _____ _____
Pyramid of
numbers: displays
the _____ of
organisms located at
each _____ _____;
can be _____
Food chains show
the _____ flow of
_____ within an
ecosystem; also
show _____-_____
relationships (who
eats whom)
Food web shows the
movement of _____
through an _____ in
a _____ _____ of
feeding _____; more
complex and
descriptive than a
_____ _____
 Food Chains/Webs
(2:40)
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Symbiosis = A close long-term _____
between two or more species.
Marine Symbiosis (6:00)
Parasitism = A
relationship
between at least two
organisms where
one derives _____
from the other (the
host).
 Parasite _____; host
is _____

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Mutualism = A symbiotic relationship in
which all participating species _____

Commensalism = is an ecological
relationship in which one species _____ and
the other is neither _____ nor _____.

Crash Course - Ecology (10:00)

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78% of the _____ is composed of nitrogen.
The nitrogen cycle is the flow of atmospheric
_____ through an ecosystem.
It is helped by _____-_____ bacteria on the
_____ of some plants.
Animals then take up the _____ from the
plants and return it to the soil in _____ and
_____ as well as death (_____).

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The water cycle is
very dependent upon
_____.
If plants are removed
from the cycle many
other nutrient cycles
will be _____.

CO2 in atmosphere from:
 _____ activity
 _____ activity
 _____ (breathing)
 CO2 from _____
 Natural _____ of organic material

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Plants remove CO2 from both the _____ and
_____.
Carbon Cycle (2:55)
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Phosphorus exists mainly in _____ and _____
minerals and in ocean sediments as _____.
Phosphorus found in the nucleic acids _____
and _____
Aquatic: Phosphates dissolved by _____
phosphorus goes into bodies of _____
organisms consume the _____.
Terrestrial: Phosphorus is taken up by _____;
animals then eat plants and obtain _____


Biodiversity = The number of _____ living in an _____ and how
common each species is; very important within an ecosystem
Importance of Biodiversity (6:50)