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Biol B1 Unit 1 > population ecology > Flashcards

population ecology Flashcards

1
Q

what is the equation for population growth

A

population increase = births - deaths + immigration - emigration

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2
Q

what terms can you use to describe a population

A

population size
range
density
distribution of the population
age structure of population

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3
Q

what is exponential growth

A

growth with no resource limits

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4
Q

what is logistical growth

A

quick growth to a sustained carrying capacity

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5
Q

what is carrying capacity

A

max population an environment can support

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6
Q

what is density dependent regulation

A

too many individuals = reduced reproduction or increased mortality

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7
Q

why is their increased mortality in density dependent regulation

A

competition for resources

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8
Q

what is density independent regulation

A

abiotic facts that cause increased mortality

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9
Q

what are some examples of density independent regulation

A

floods
tsunamis
tornados
earthquakes

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10
Q

in an age structure graph population data is located on the

A

x axis

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11
Q

in an age structure graph age difference is located on the

A

y axis

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12
Q

what type of shape is young and growing population

A

wide bottom
narrowing top
fat triangle

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13
Q

what type of shape is slow growth

A

triangle

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14
Q

what type of shape is no growth

A

boxy

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15
Q

what type of shape is negative growth

A

bottom small
middle to large big

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16
Q

what is a survivorship curves

A

displays survival of individuals based on age

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17
Q

what qualities does a r selected organism have

A

short live span
short maturation time
many off spring
small size
little parental care

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18
Q

what qualities does a k selected organisms have

A

long live span
long maturation time
few offspring
large size
extensive parental care

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19
Q

what is an invasive spevies

A

an organism not native to the land and they take over the natural habitat and kill natural/ native organisms

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20
Q

what is a community

A

own population + other populations

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21
Q

what is an ecosystem

A

community + abiotic factors

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22
Q

what flows through the ecosystem

A

energy and nutrients

23
Q

what is population

A

specific species in an area

24
Q

what is a niche

A

specific habitat and role for a species

25
Q

what is a habitat

A

space
home
type of amount of food
temperature and moisture requirement

26
Q

what is the role

A

their predators and prey
influence on competitors
life history

27
Q

what is competitive exclusion

A

one species uses resources more efficiently and drives other species to extinction

28
Q

what is resource partitioning

A

species alter their use of niche and divide resources

29
Q

what is recycled within and between ecosystems

A

chemicals

30
Q

what is trophic strucutre

A

who eats whom in an ecosystem

31
Q

what does the trophic strucutre determine

A

the passage of energy and nutrients

32
Q

autotrophs are always

A

producers

33
Q

heterotrophs are always

A

consumers

34
Q

what is a food chain

A

displays one path of consumption

35
Q

what is always at the bottom of the food chain

A

producers

36
Q

primary consumers eat

A

producers

37
Q

secondary consumers eat

A

primary consumers

38
Q

detritovores only eat

A

dead organisms

39
Q

food webs displays

A

multiple food chains

40
Q

what is the rule of 10

A

each level on the food chain going bottom to up get less energy so they need to eat more to survive

41
Q

biogeochemical cycles involve

A

biotic and abiotic components

42
Q

what water cycles natural reservoir is the

A

oceans

43
Q

the water cycle is

A

evaporation = condensation = precepitation = percolation

44
Q

the carbon cycles natural reservoir is

A

atmosphere and air

45
Q

the phosphate cycles natural reservoir is

A

rocks

46
Q

the nitrogen cycles natural reservoir is

A

atmosphere and air

47
Q

what is eutrophication

A

when a good nutrient cycle goes bad

48
Q

what is an example of eutrophication

A

algae bloom

49
Q

what is biological diversity

A

the number of species and number of individuals of each species

50
Q

what is the main thing that causes biological diversity

A

mutations

51
Q

why is biodiversity so important

A

natural resources
ecosystem services
human health
biomimicry technology
recreation
entertainment
culture
art

52
Q

what threatens biodiversity

A

habitat destruction
invasive species
population
pollution
climate change
over exploitaiton

53
Q

are all GMOs bad

A

no

54
Q
A

Biol B1 Unit 1 (17 decks)

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