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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
what is a habitat
space home type of amount of food temperature and moisture requirement
26
what is the role
their predators and prey influence on competitors life history
27
what is competitive exclusion
one species uses resources more efficiently and drives other species to extinction
28
what is resource partitioning
species alter their use of niche and divide resources
29
what is recycled within and between ecosystems
chemicals
30
what is trophic strucutre
who eats whom in an ecosystem
31
what does the trophic strucutre determine
the passage of energy and nutrients
32
autotrophs are always
producers
33
heterotrophs are always
consumers
34
what is a food chain
displays one path of consumption
35
what is always at the bottom of the food chain
producers
36
primary consumers eat
producers
37
secondary consumers eat
primary consumers
38
detritovores only eat
dead organisms
39
food webs displays
multiple food chains
40
what is the rule of 10
each level on the food chain going bottom to up get less energy so they need to eat more to survive
41
biogeochemical cycles involve
biotic and abiotic components
42
what water cycles natural reservoir is the
oceans
43
the water cycle is
evaporation = condensation = precepitation = percolation
44
the carbon cycles natural reservoir is
atmosphere and air
45
the phosphate cycles natural reservoir is
rocks
46
the nitrogen cycles natural reservoir is
atmosphere and air
47
what is eutrophication
when a good nutrient cycle goes bad
48
what is an example of eutrophication
algae bloom
49
what is biological diversity
the number of species and number of individuals of each species
50
what is the main thing that causes biological diversity
mutations
51
why is biodiversity so important
natural resources ecosystem services human health biomimicry technology recreation entertainment culture art
52
what threatens biodiversity
habitat destruction invasive species population pollution climate change over exploitaiton
53
are all GMOs bad
no
54

Biol B1 Unit 1 (17 decks)

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