Ecology 4-6

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logistic growth vs. exponential growth

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22 Terms

1

logistic growth vs. exponential growth

L- limited growth, most organisms

E- unlimited growth, humans

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2

define renewable resources

resources that is replenished faster than it is used

ex. wood, wind, solar, water

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3

define non-renewable resources

limited resources, once there gone there gone

ex. coal, oil, gasoline

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4

what is a trade off

negative effects because of something we used

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5

what is a negative impact from nuclear power

radioactive substances are dangerous

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6

what human activity has the most significant effect on earth’s atmosphere

burning of fossil fuels (combustion), increases CO2 in atmosphere

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7

name three human activities and a geochemical cycle that they negatively impact

fertilizers- nitrogen- pollute watersheds

combustion- carbon- global warming

Paving and concrete- water- increases runoff

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8

succession

where one community is replaced by another community over time until a stable community is reached

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9

pioneer species

first organisms to grow in a new enviroment

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10

climax community

mature and stable community of plants and animals

(end of succession)

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11

How are primary and secondary succession alike

name two ways

one community will replace another until stability is reach

both start with pioneers

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12

How are primary and secondary succession different

name two ways

primary starts at bare rock, secondary starts with soil

secondary happens after a disaster, primary is the formation of a brand new ecosystem

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13

what is a parasite

an organism that lives off another organism

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14

how is a parasite differ from a predator

a parasite doesnt want to kill its host

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15

Mutualism

both organisms benefit from each other

++

ex. flowers and bees

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16

commensalism

one organism benefits while the other is unaffected

+0

ex. trees and orchids

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17

parasitism

one organism benefits while the other is harmed

+-

ex. Head lice and human

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18

niche

all the things an organism needs and does within its habitat

(the role an organism plays in an ecosystem

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19

habitat

actual area in the ecosystem where an organism lives

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20

when do organism compete

when they have the same niche

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21

interspecific competition

competition between different species

(international)

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22

intraspecific competition

competition within the same species

(intramural)

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