Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

HELENP EE POPULATION ECOLOGY > EE Lecture 30: Predation 2 > Flashcards

EE Lecture 30: Predation 2 Flashcards

1
Q

what predator has high lethality but low intimacy

A

true predators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

describe parasitoids in terms of lethality and intimacy

A

high lethality high intimacy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

what predator has high intimacy, low lethality

A

parasites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

describe grazers in terms of lethality and intimacy

A

low intimacy

low lethality

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what predator has high intimacy high lethality

A

parasitoids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

describe true predators in terms of lethality and intimacy

A

high lethality

low intimacy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what predator has low intimacy low lethality

A

grazers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

describe parasites in terms of lethality and intimacy

A

low lethality high intimacy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what is partial refugia

A

when aggregation creates a safer space for the pop as it excludes interspec comp and keeps condns more constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what do mummy parasitoids do

A

eat hyperparasitoids

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is a hyperparasitoid

A

a parasite whose host is a parasite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the LV -prey eqtn

A

dN/dt = rN - aPN

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

in LV predator prey model, what is a and P

A 
a = search efficiency/attack rate
P = number predators
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what is the basic predator model, with no prey = decline through starvation

A

dP/dt = -qP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what is LV predator eqt

A

dP/dt = caPN - qP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

in LV predatpr eqtn what is q and c

A 
q = starvation rate
c= conversion rate
17
Q

what is the overall rate at which predators remove individuals from the prey pop

A

aNP

18
Q

what is the LV predator prey model

A 
dN/dt = rN - aPN
dP/dt = caNP - qP
19
Q

in LV predator prey model, what is osocline

A

aa line for which P is constant

20
Q

using the LV pred prey model, when does the prey pop decrease

A

the prey pop decreases if the number of predators P is greater than r/a

21
Q

using the LV pred prey model, when does the prey pop increase

A

the prey pop increases if the number of P predators is fewer than r/a

22
Q

what is eqtn for adding functional response to exponential pop growth rate

A

dN/dt = rN - aPN (a = attack rate)

23
Q

using LV pred-prey model, at zero isoclines when no change in prey, what is P

A

P = r/a

24
Q

at zero isoclines, when no change in predators

A

N = q / ca

25
Q

what suggests that predator prey cycles have an inherant tendency to cycleq

A

combining results of the isoclines suggesting that prey pops dont change when P = r/a and predator pops dont change when N = q / ca

26
Q

what is eqtn for dP/dt and dN/dt in LV pred-prey model

A 
dP/dt = caPN - qP
dN/dt = rN - aPN
a=attack rate
q=starvation rate
c = conversion rate
27
Q

how can you show graphically that predator prey relationships cycle

A

plot the abundance preds vs. abundance prey

AND plot abundance of both pred and prey vs. time

28
Q

what is the outcome of LV predator prey cycles

A

coupled oscillations which are neutrally stable and each disturbance initiates a new set of cycles

29
Q

in lynx hare cycle, how far behind is the predator

A

quarter of a cycle

30
Q

give some examples of apparently coupled oscillations

A

indian meal moth and the parasitoid

snowshoe hare and canadian lync

31
Q

give example of pops that cycle by themselves

A

the indian meal moth cycles by itself

32
Q

what does the amplitude of the pred prey LV cycle depend on

A

depend son the initial numbers of predators and prey = if the initial numbers shift even slightly, the amplitude of the cycle with change -this is UNREALISTIC

33
Q

what influences the popn cycling of snowshoe hares+canadian lynx

A

predation AND food

34
Q

which dynamics are most complicated - hare or lynx?

A

hare dynamics more complicated, theyre affected by lynx but also by available high quality food plants

35
Q

why are type 2 FRs theoretically destabilizing

A

due to the fact they are inversely density dependent

36
Q

what dampens LV oscillations - how?

A

competition/interference dampens oscillations due to non linear isoclines

37
Q

how can popn dynamics be stabilized

A

aggregation
spatial structure
metapopns
spatial strcture

HELENP EE POPULATION ECOLOGY (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions