Brainscape's Knowledge GenomeTM

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


See full index

Ecology - Populations to Ecosystems > Population Dynamics of Predation > Flashcards

Population Dynamics of Predation Flashcards

1
Q

Two components of LV model…

A

N being numbers of prey
P being predator population

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

LV Model

A

Prey are removed depending on prey/predator encountering then removal by searching/attacking efficiency of predator

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

LV Equations…

A

dN/dt=rN-aPN
dP-dt=-qP
dP/dt=faPN-qP

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

Derive LV model…

A

a is efficiency of searching/killing
q is predator mortality rate

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

Derive dP/dt-faPN-qP

A

aPN describes rate at which food is consumed
f is predator efficiency

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

What does faPN-qP describe?

A

Predator mortality depends on consumption rate and effiency of turning food into offspring

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

Zero Isoclines

A

Describes equilibrium of population growth and decline of predator/prey population

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

What can zero isocliens be used for?

A

Look at properties of this model, graphically with prey density against predatory density

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

What do lines is ZI show?

A

Combinatiosn of predator/prey density leading to unchanging prey or predatory population, an isocline of each plotted on same figure
One side of isocline means population decrease whilst other increase

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

Examples of abundance patterns generated by prey/predator populations…

A

Stable-point Equilibra, multigeneration cycle, one-generation cycles, caos

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

Primary driver of abundance patterns…

A

Density dependence

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

Examples of patterns of consumption…

A

Higher consumption means quicker growth, develoment and birth, influencing migration/density dependence

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

Functional Response

A

Is the dependence of consumption rate on prey abundance, as a function of prey density

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Type 1 FR

A

Linear increase in consumption rate with prey density

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

Type 2 FR

A

Limitation in consumption rate with prey density, that being a plateau proceeding icnreasing

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

Type 3 FR

A

Sigmoidal curve with beginning of curve experiencing acceleration, predator interest in prey when density at certain amount, similar plateau with handling time

17
Q

Mast Years

A

Large amounts of reproduction in specific years with low amounts of reproduction in between

18
Q

Importance of mast years in plants…

A

Bypass excessive predation, due to satiation, low-densities, slow expansion unable to exploit

19
Q

Cicadas in mast years…

A

Prime numbers of 13 or 17 years, with rapid abundance, hatch in oviposit in cnaopies, predators cannot track

20
Q

How is predation influenced by intra/inter comp?

A

Mutual interference limit consumption rate of predators, even if prey not limited

21
Q

Exampels of comp altering LV dynamics…

A

THe more competitors the more one defens resource, or prey intimidated by predators

22
Q

Examples of zero isocline density in interference…

A

Low densities assume no intra comp, thus horizontal isocline, where intra comp increases with prey density

23
Q

Mutual Interference

A

This is when access to resources is negatively affected by presence of other individuals

24
Q

What creates a carrying capacity?

A

High densities and resource competition

25
Q

Population dynamics of Type 3 FR

A

Prey at low densities increase in abundance regardless of predator density, which can be stable if predator acn maintain themselves at low densities
Contradict idea of type 3 response, ignoring prey at low densities

26
Q

Population dynamics of Type 2 FR…

A

Zero isocline rise as prey density increases if predator plateaus at low prey density, due to prey insufficiency with following fall with prey competition

27
Q

Why might patchiness influence foraging…

A

Differ in prey densities or description of a patch dependent on size of predator

28
Q

Marginal Value Theorem

A

Model descriing behaviour of an optimally foraging indivdual in systems where resources are located in discrete patches between areas with no resoruces

29
Q

Examples of PD heterogeneraity…

A

Snails within cracks, away from predator birds, thus vertical zero isocline at low prey abudnance

30
Q
A

Ecology - Populations to Ecosystems (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions