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General Ecology > Population Ecology > Flashcards

Population Ecology Flashcards

1
Q

It uses stones to pry shellfish and break them open on their bellies while swimming on their backs.

A

Sea Otter

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2
Q

The branch of ecology that studies the structure and dynamics of populations.

A

Population Ecology

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3
Q

A group of similar individuals of the same species living in the same place at the same time.

A

Population

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4
Q

What are the four (4) major characteristics of a population?

A

Population size
Population Density
Population Dispersion
Age structure

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5
Q

What are the three characteristics of Population Dispersion?

A

Random Distribution
Uniform Distribution
Clumped Distribution

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6
Q

Number of individuals in a population at a given time

A

Population Size

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7
Q

It leads to extinction, therefore there is low chance of finding (suitable) mates, genetic consequences, environmental effects.

A

Very Small Populations

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8
Q

It leads to starvation, predation, disease which therefore there is competition in resources and etc.

A

Very Large populations

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9
Q

How many is the population in the philippines as of October 11, 2016?

A

102, 691, 858 Filipinos

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10
Q

Number of individuals of a population in a certain space at a given time.

A

Population Density

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11
Q

number of individuals per unit space

A

Terrestrial ecosystems

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12
Q

number of individuals per unit volume

A

Aquatic ecosystems

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13
Q

What are the effects of high population density

A

Scarcity of food
Lower access to nesting/breeding sites
Higher risk of the spread of disease and parasites
Higher susceptibilty to predation

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14
Q

What are the two effects of low population density

A

Reduced chance of finding a mate
Increased inbreeding

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15
Q

The spatial pattern in which members of a population are found in their habitat

A

Population dispersion

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16
Q

The position of individuals of a population are independent of the other.

A

Random distribution

17
Q

individuals of a population are more or less evenly distributed

A

Uniform distribution

18
Q

patches or groups of organisms scattered over a given area.

A

Clumped distribution

19
Q

Population dispersion (and size) is also affected by…

A

Immigration
emigration

20
Q

The influx of new individuals into a population

A

immigration

21
Q

the dispersal of individuals from a population

A

emigration

22
Q

distribution of organisms in a population in time

A

Temporal distribution

23
Q

Temporal distribution maybe:

A

Circadian
influenced by tidal fluctuations
lunar
seasonal
due to succesional changes
due to evolutionary changes

24
Q

Scientific name of sea otter

A

Enhydra lutris

25
Q

it is the relative proportion of individuals in each age group of a population

A

Age structure

26
Q

Age structure maybe divided into:

A

Pre-productive (younger than age of sexual maturity)
Reproductive (age of sexual maturity)
Post-productive (older than age of sexual maturity)

27
Q

Factors that influence population size

A

Growth Factors (biotic potential)
Decrease factors (environmental resistance)

28
Q

The number of young produced per unit of a population per unit of time; major agent of population growth.

A

Birth rate

29
Q

The number of deaths per unit of time; major agent of population loss

A

Death rate

30
Q

Classifications of Growth

A

Rapid Growth
Slow Growth
Zero Growth
Negative Growth

31
Q

Younger than age of sexual maturity

A

Preproduction

32
Q

Younger than age of sexual maturity

A

Preproduction

33
Q

older than age of sexual maturity

A

Postproductive

34
Q

Population size changes due to

A

Birth
Death
Immigration
Emigration

35
Q

The capacity of a population for
growth (increase in size) →
varies among populations

A

Biotic potential of a population

General Ecology (2 decks)

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