Transcript population density

Welcome to Ecology
Biojeopardy!!
Chapter 14 Fun! 
Instructions:
1.Click on a box under the category you
want.
2.Read the question and try to answer
to yourself.
3.Click one time for the answer to
appear.
4.After, click on the ‘Continue’ arrow to
bring you back to the main screen
Note: After clicking once to view the answer, try to
remember to click only on the ‘Continue’ arrow.
Clicking anywhere else will automatically bring you
to the next slide in order without choice.
Interact!
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How an
Organism
lives
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Population
Density
and Dispersal
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Population
Growth
patterns
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Succeeding
In
succession
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Type of symbiosis where one
individual benefits while the other
individual is harmed (slowly)
What is parasitism
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200
Occurs when one
organism captures and
eats another organism
What is predation
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This is when two organisms fight
for the same limited organisms
What is competition
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400
Type of symbiosis that occurs
where both individuals benefit
What is mutualism
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The type of symbiosis that
occurs when one organism
benefits and the other
organism is neither benefited
nor harmed
What is commensalism
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600
In the “Modeling Predation” lab,
we modeled predation after an
algal bloom and after a spawn. In
our model, a __________was hunting
for __________.
What is heron, fish
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700
Certain species of mites will live
on the bodies of flies (mostly for
transportation). The mite makes
flight more difficult for the fly and
also affects its aerial hunting
ability. This interaction is _________
What is parasitism
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800
Oxpeckers are birds that run over
the backs of hippopotami and
rhinoceroses. These birds rid their
partners of injurious and annoying
pests and in doing so obtain a ready
supply of food.
This is an example of _______________
What is mutualism
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900
Humans have Demodicids (eyelash
mites) that feast on oil secretions
and dead skin. We don’t know they
are there. This is an example of
___________.
What is commensalism
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1000
This is the difference between an
ectoparasite and an endoparasite.
What is endoparasites
live within and
ectoparasites live on the
outside
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All of the biotic and abiotic
factors that make up the
area where a species lives
What is habitat
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200
This is an example of both an
abiotic and biotic factor in “your”
environment:
What is “1 living” and “1
nonliving”…answers vary
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300
Species that occupy similar niches
but live in different geographical
regions
What are ecological equivalents
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400
When two species are competing for
the same resources, one species will
be better suited to the niche…and the
other will be pushed into another
niche or extinction
What is competitive exclusion
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500
This is what “niche partitioning”
means:
What dividing up natural resources, so that
two species can “share” the niche
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These are the three factors that make
up an organism’s “ecological niche”
What are 1)food, 2)abiotic conditions,
3)behavior
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700
This is one reason why it might hurt
biodiversity if you move an “exotic
species” into a habitat it doesn’t
currently occupy
What is “it could better adapt to the
niche or have no natural predators…it
could drive native species out or to
extinction [competitive exclusion]
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800
Frog A lives in Madagascar and has
the same nice as Frog B from South
America. “This” is the reason why
these frogs are NOT experiencing
competitive exclusion.
What is the frogs are not part of the
SAME community (competing for same
limited resources)
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900
One of the factors that makes up
an ecological niche; the time of day
a species is active as well as
where it reproduces.
What is behavior
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1000
An example of an outcome of
competitive exclusion is
_________evolution where selection
for a specific physical trait allows
one organism to be better adapted
to survive in a different “part” of
the niche.
What is divergent
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A measurement of the number of
individuals living in a defined space
What is population density
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200
Individuals may live in this kind of
“dispersion pattern” if they are
territorial or compete for the same
resources often.
What is uniform dispersion
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300
In order to gain protection or help each
other out more readily in accessing
food and other resources, individuals
within a population may have this type
of dispersion.
What is “clumped dispersion”
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400
The three-toed sloth is a
solitary animal, and it has no
competitors and few natural
predators. It would most likely live
in a __________ dispersion pattern
What is random
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500
Organisms like
birds, small
mammals and
reptiles show
survivorship
roughly equal at all
ages of an
organism’s life. This
is which “Type” of
survivorship curve
What is “Type 2”
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600
Organisms
like salmon
have this
type of
survivorship
What is Type III
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This is the type of information a
survivorship curve shows
What is the number of surviving
members in a population over time.
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800
This is how population density and
population dispersal are different
What is population density measures
the number of individuals in an area
(not how they are grouped/dispersed)
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900
This type of “intraspecific”
interaction might cause uniform
dispersion.
What is competition for limited
resources
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1000
Scientists might infer “this” about
a deer’s habitat if the density of
the deer population decreases over
a given time.
What is that resources may be depleted
or community may have changed due to
arrival of a new predator
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100
This is the type of growth that occurs
when a population size increases
dramatically over a period of time
(producing a J-shaped curve)
What is exponential growth
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The movement of individuals out of a
population into another population
What is emigration (with an “e”)
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The maximum number of individuals of
a particular species that an
environment can normally and
consistently support
What is carrying capacity
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A dramatic decline of a population over
a short period of time.
What is a population crash
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Parasitism and disease are examples of
density _________limiting factors
What is dependent
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The “kind of factor” that has the
greatest effect in keeping the
population numbers LOW for any given
species
What is a limiting factor
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Aspects of the environment that
limit a population’s growth
regardless of the density of the
population
What is a density independent limiting
factor
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800
An example of a density
independent limiting factor
What is unusual weather, natural
disasters, and human activity
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900
A population of algae in a pond is
limited by the amount of sunlight
that strikes the pond’s surface.
Sunlight is an example of a density
_____________factor.
What is independent (unless the algae
population becomes big enough to
block the sunlight)
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1000
A grasshopper feeds on meadow
grasses. If a fire burns its field,
resources are diminished, and
carrying capacity is altered. This
is one way carrying capacity
could be increased for this
population.
What is (e.g. high raingrasses
flourish!)
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100
This is the reason why shrubs and
grasses are able to take root so quickly
in secondary succession.
What is there is soil already present
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This type of succession occurs on a
newly formed volcanic island (when no
soil is present)
What is primary succession
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An example of a pioneer species.
What are lichen, mosses, etc.
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What a pioneer species’ job is…
What is break down solid rock into soil
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This is where succession is most
likely to occur in an ocean.
What is a coral reef.
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Fire is important for secondary
succession. This is fire’s role.
What is fire helps return nutrients to
the soil.
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This is an example of the kind of
tree that might first appear in
primary succession.
What is (LIST 1) cottonwoods,
alders, or shrubs
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800
These are two examples of types
of events that might result in
primary succession.
What are glaciers, volcanoes, landslide,
and strip mining.
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This is the reason why primary
succession will take much longer
in arctic areas than tropical areas.
What is soil takes longer to form
(because rock is covered with snow, the growing
season is shorter, and cold temperatures slow
growth and decomposition)
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1000
A lichen is an example of a pioneer
species. But “this” is what a lichen
has to do with “symbiosis”
What is a lichen is two different species
(algae conducts photosynthesis and
algae collects water)
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