Limiting Population Size

0.0(0)
studied byStudied by 0 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/17

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

18 Terms

1
New cards

What happens the bigger a population grows?

The more resources are taken from the environment

2
New cards

What is the carrying capacity of an environment?

The maximum size of a population that an environment can support.

<p>The maximum size of a population that an environment can support.</p>
3
New cards

What does K represent in population ecology?

K represents carrying capacity.

4
New cards

Name the factors that can affect carrying capacity.

  • Light availability

  • Temperature

  • Soil mineral availability

  • Competition for resources

  • Predation

  • Disease

5
New cards

Factors that animals would compete for:

  • Space

  • Mating partner

  • Water

  • Food

  • Shelter

  • Territory

6
New cards

Factors than plants would compete for:

  • Space

  • Fertile soil

  • Sunlight

  • Carbon Dioxide

  • Temperature

  • Water

7
New cards

What are density-dependent factors?

Factors that depend on population size.

8
New cards

What are the three main groups of density dependent factors?

  • Competition

  • Predation

  • Disease/parasitism/infestation

9
New cards

Competition

For limited resources

10
New cards

Predation

More intense if a population of prey becomes denser and less intense if the prey become more scarce

11
New cards

Disease/Parasitism/Infestation

Increase in population density because it is easier for pathogens, parasites and pests to spread

12
New cards

What are density-independent factors?

Factors that affect all population in a similar way

13
New cards

What are the four main groups of density independent factors?

  • Environmental change

  • Build up of toxins

  • Injury

  • Senescence (death from age related illness)

14
New cards

What is a negative feedback loop in population dynamics?

A self-regulating system where any deviation from steady-state is counteracted to promote stability.

<p>A self-regulating system where any deviation from steady-state is counteracted to promote stability.</p>
15
New cards

Why does population size vary over time?

Due to density-independent or density-dependent factors

16
New cards

How do density-dependent factors regulate population size?

They cause fluctuations in population size, promoting stability over time.

17
New cards

More breeding/fewer deaths (population increases)

Density dependent factors cause more deaths/less breading (population decreases)

18
New cards

More deaths/less breading (population decreases)

Density-dependent factors cause more breeding/fewer deaths (population increases)