First hour exam

http://life.uiuc.edu/animalbiology/105/ID: eee105Password: prAIRie

Friday Feb 8noon here

100 points (of 500 for semester)29 questions 57 bubbles

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by Wednesday’s lecture

Wed. Feb 6

Conflict Exam 5-7pm 100 Gregory

EEE 105

2 Question Formats:

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 choice

EEE 105(TF) Endosymbiosis is responsible for ________________ .

11. denitrification

12. nitrogen fi xation in plants13. nutrition of hydrothermal vent worms14. the origin of chloroplasts15. decomposition of dead organic matter

TF

F

TT

Multiple True-False

Population EcologyEE

E 1 0

5

http://life.uiuc.edu/animalbiology/105/ID: eee105Password: prAIRie

Chapter 6Chapter 6

limiting factors density-dependent

limiting factors density-dependent

Predation regulates prey populationsPredation regulates prey populationsPredation regulates prey populations

predation is “good” for the preypredation is “good” for the prey removes oldremoves old , diseased, diseased, young, young density-dependentdensity-dependent

Predation regulates prey populationsPredation regulates prey populationsPredation regulates prey populations

predation is “good” for the preypredation is “good” for the prey removes oldremoves old , diseased, diseased, young, young density-dependentdensity-dependentpredator/prey interactionpredator/prey interaction

limiting factors density-dependent

Disease regulates populations

disease is “good” for the preydisease is “good” for the prey removes oldremoves old , diseased, diseased, young, young density-dependentdensity-dependentpredator/prey interactionpredator/prey interaction

epidemic wavesepidemic waves

EnergyFood chain

E

producer primary secondaryconsumer consumer

Trophic levels

autotroph herbivore predator

respiration

decomposition

Photosynthetic food chain

parasites

parasites

parasites

each trophic level regulates population of its preyeach trophic level regulates population of its prey parasites (diseases) regulate population of hostsparasites (diseases) regulate population of hosts

Population density also changes behaviorRats in 1/4 acre pens

all the food & water they needN

t

K 5,000

150

social behavior destroyedsocial behavior destroyed

Predators can also regulate diversity

of their community

e.g. marine rocky coast intertidal zone

Predators can also regulate diversity

A tide poolA tide pool

dozens of speciesdozens of speciesa diverse communitya diverse community

dozens of speciesdozens of speciesa diverse communitya diverse community

Starfish prey on mollusksStarfish prey on mollusks

when starfish removedwhen starfish removed

Starfish prey on mollusksStarfish prey on mollusks

when starfish removedwhen starfish removed mussels overgrow everythingmussels overgrow everything

Starfish are keystone predatorsStarfish are keystone predators

many species wiped outmany species wiped out

They promote species diversityThey promote species diversity

biotic potential

rmax = intrinsic rate of increase

dN/dt = N rmax

logistics curve

dN/dt = N rmax(K - N/K)

K = the carrying capacity

N

t

K

r-strategy

rapid reproduction

N

t

K

“boom and bust”

pests are r-strategists

K-strategy

N

t

K

large size, deliberate reproduction

r-strategist K-strategist

r- and K-strategies contrasted

population growth small

slow fast large body size

many

offspring survival

low high

high low parental care

few offspring #

r strategyr strategy K strategyK strategy

EnergyFood chain

E

producer primary secondaryconsumer consumer

Trophic levels

autotroph herbivore predator

respiration

decomposition

Photosynthetic food chain

parasites

parasites

parasites

EnergyFood chain

E

producer primary secondaryconsumer consumer

Trophic levels

autotroph herbivore predator

respiration

decomposition

Photosynthetic food chain

parasites

parasites

parasites

parasites are r-strategists

Secondary succession

r strategyr strategy K strategyK strategy

End of Materialfor First Hour Exam