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Biology 30 > Populations and communities > Flashcards

Populations and communities Flashcards

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1
Q

Population

A

A group of individuals the same species in the same area at the same time.

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2
Q

Gene pool

A

All of the genes in a population

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3
Q

Community

A

a composite of populations

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4
Q

Symbiosis

A

Another word for relationship

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5
Q

Parasitism

A

one organism feeds in or on host

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6
Q

Mutualism

A

Both members benefit

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7
Q

Commensalism

A

One member benefits the other is unaffected

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8
Q

Predator

A

The hunter

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9
Q

prey

A

the hunted

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10
Q

Natality

A

Birth

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11
Q

Mortality

A

Death

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12
Q

Immigration

A

Individuals moving into an area

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13
Q

Emigration

A

Individuals moving out of an area

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14
Q

Environmental resistance

A

Factors that limit population growth

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15
Q

Gausses’ theory of competitive exclusion

A

fierce competition when niches overlap, giving only one clear winner

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16
Q

Natural selection

A

Those who are more well suited to environment survie and reproduce

17
Q

Succession

A

The orderly step by step process of a maturing ecosystem

18
Q

Primary succesion

A

Initial development -no soil exists yet - e/g after a rock slide

19
Q

Secondary Succesion

A

rebuilding on preexisting soil e.g after a fire

20
Q

r-selected species

A

Small short lived organisms with a high reproductive rate

21
Q

K-selected species

A

Large, long lived organisms with a low reproductive rate

22
Q

J-curve

A

Exponential population growth

23
Q

S-curve

A

Logistic growth

24
Q

Carrying Capacity

A

is the maximum stable population size

25
Q

genetic drift

A

change in genetic makeup of a population due to random chance/change

26
Q

Gene Flow

A

Genes moving into and out of a population due to migration

27
Q

Bottleneck Effect

A

After wide scale death, survivors/ future pop is more genetically similar

28
Q

Founder effect

A

Random group of individuals from basis on new pop.

29
Q

Interspecific competition

A

Individuals of a different species competing

30
Q

Intraspecific competition

A

Individuals of the same species competing

Biology 30 (3 decks)

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