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ecosystems and natural stuff > ecosystems > Flashcards

ecosystems Flashcards

1
Q

define habitiat

A

the place where organisms live

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2
Q

define population

A

all organisms of one species in a habitat

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3
Q

define community

A

populations of different species in a habitat that make up a community

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4
Q

define ecosystems

A

a community plus all abiotic factors

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5
Q

define niche

A

role of species within it’s habitat

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6
Q

define adaptation

A

a feture that members of a species have that increases their chance of survival

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7
Q

what is the specific requirment of a niche

A

it can only be occupied by one species

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8
Q

what are the three types of adaptations

A

physiological
behavioural
anatomical

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9
Q

what are the two types of conditions that are a cause of adaptation

A

abiotic
biotic

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10
Q

how does population size vary due to abiotic factors

A

maximum stable capacity - all the eco system can support = carrying capacity as a result of abiotic and biotic factors

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11
Q

define population size

A

the total number of organisms of one species in a habitat

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12
Q

what is interspecific compertion

A

compertion between differemt species

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13
Q

why does interspecific compertion occour

A

over a limited resource

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14
Q

what is intraspecific compertion

A

competition within a species

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15
Q

in a competion graph what are 4 key terms

A

log phase
lag phase
carrying capacity/ stable
death

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16
Q

define the lag phase

A

where their is no increase in number of population as birth rate and death rate are equall

17
Q

define log phase

A

population increases as birthrate outways death rate as their is plenty of resources e.g food

18
Q

define carrying capacity

A

the maximum population size an ecosystem can support

19
Q

define the death phase

A

where their is limited resources so death rate out ways birth rate

ecosystems and natural stuff (3 decks)

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