test 2 Flashcards

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1
Q

productivity

A

amount of photosynthesis in a given area

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2
Q

gpp vs npp

A

npp = gpp-amount respired

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3
Q

trophic levels

A

level in an ecosystem

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4
Q

order of producers/consumers

A

primary producer, primary consumer, secondary consumer, tertiary consumer, quaternary consumer

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5
Q

how much energy is passed from trophic level to trophic level

A

10%

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6
Q

Why isn’t 100% of energy passed along as you move from one trophic level to another?

A

energy is always burned or lost as heat

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7
Q

biomass

A

amount of living things in a certain area (volume)

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8
Q

How does the biomass at the bottom of a trophic pyramid compare to the biomass at the top? Why is there a difference?

A

a lot less at the top (10% less every step up)

there is a difference because there are less resources availabele every step up

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9
Q

food web vs food chain

A

food chain is who eats who, food web is a map of all of the food chains

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10
Q

arrows of a food web

A

represent flow of energy

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11
Q

biodiversity
what are the three types?

A

variety of life and species
habitat, genetic, species

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12
Q

habitat diversity

A

variety of ecosystems

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13
Q

species diversity

A

various types of species in a given area

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14
Q

genetic diversity and why is it important

A

multiple genes in a species, species can adapt better

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15
Q

productivity and species in one area link

A

the more productivity, the more plants, the more species in one area

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16
Q

species richness vs species evenness

A

species richness: multiple different kinds of species
species evenness: evenly distributed species

17
Q

keystone species

A

predator that regulates the whole ecosystem

18
Q

generalists and specialists

A

generalists can do anything, specialists can’t adapt as well

19
Q

ecological tolerance

A

range of conditions an organism can live in

optimal range, zone of physiological
stress, zone of intolerance

20
Q

disturbance

A

change in an ecosystem

21
Q

options when faced w disturbance

A

die off, move, or evolve

22
Q

adaptations

A

when genes are passed on because of an individual’s suitability

23
Q

extinction

A

when a species dies out

24
Q

how many species have gone extinct in the world

A

99%

25
Q
A