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First hour exam
Friday Feb 8
noon here
100 points (of 500 for semester)
29 questions 57 bubbles
TEST REVIEW Wed. Feb 6
5-7pm 100 Gregory
Conflict Exam
If University-approved conflict
http://life.uiuc.edu/animalbiology/105/
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up eee105
with Karin Nelson
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Wednesday’s
lecture
prAIRie
EEE 105
2 Question Formats:
Multiple choice
Multiple True-False
Multiple choice
EEE 105
7. (MC) Plants and animals are
absolutely identical in the way they
____________ .
A. obtain energy
B. respire
C. apportion energy between
their necessary life activities
D. reproduce
E. obtain nutrients
Multiple True-False
EEE 105
(TF) Endosy mbiosis is responsible for __________
F 11. denitri fication
T
T
T
F
12.
13.
14.
15.
nitrogen fixation in plants
nutrition of hyd rothermal ven t worms
the origin of chloroplasts
decomposit ion of dead organ ic matter
Population Ecology
Chapter 6
http://life.uiuc.edu/animalbiology/105/
ID: eee105
Password: prAIRie
density-dependent
limiting factors
density-dependent
limiting factors
Predation regulates prey populations
predation is “good” for the prey
removes old , diseased, young
density-dependent
Predation regulates prey populations
predation is “good” for the prey
removes old , diseased, young
density-dependent
predator/prey interaction
density-dependent
limiting factors
Disease regulates populations
disease is “good” for the prey
removes old , diseased, young
density-dependent
predator/prey interaction
epidemic waves
Energy
Food
chain
Photosynthetic
food chain
Trophic levels
producer
E
primary
consumer
secondary
consumer
parasites respiration
parasites
parasites decomposition
autotroph
herbivore
predator
each trophic level regulates population of its prey
parasites (diseases) regulate population of hosts
Population density also changes behavior
Rats in 1/4 acre pens
all the food & water they need
N
K
5,000
150
social behavior destroyed
t
Predators can also regulate diversity
of their community
e.g. marine rocky coast
intertidal zone
Predators can also regulate diversity
A tide pool
dozens of species
a diverse community
Starfish prey on mollusks
when starfish removed
dozens of species
a diverse community
Starfish prey on mollusks
when starfish removed
mussels overgrow everything
many species wiped out
Starfish are keystone predators
They promote species diversity
dN/dt = N rmax
N
K
biotic potential
logistics curve
dN/dt = N rmax (K - N/K)
t
rmax = intrinsic rate of increase
K = the carrying capacity
r-strategy
rapid reproduction
N
K
“boom and bust”
pests are r-strategists
t
K-strategy
large size, deliberate reproduction
N
K
t
r- and K-strategies contrasted
r-strategist
population
growth
body size
K-strategist
fast
small
slow
offspring #
many
few
offspring
survival
parental
care
low
low
large
high
high
r strategy
K strategy
Energy
Food
chain
Photosynthetic
food chain
Trophic levels
producer
E
primary
consumer
secondary
consumer
parasites respiration
parasites
parasites decomposition
autotroph
herbivore
predator
Energy
Food
chain
Photosynthetic
food chain
Trophic levels
producer
E
primary
consumer
secondary
consumer
parasites respiration
parasites
parasites decomposition
autotroph
herbivore
predator
parasites are r-strategists
Secondary succession
r strategy
K strategy
End of Material
for First Hour Exam