Chapter 53: Ecosystems and Global Ecology

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16 Terms

1
Ecosystem
The community of interacting species present in a region, along with the abiotic components of the soil, water and atmosphere
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2
Autotrophs
Organisms that synthesize their own food from inorganic sources
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3
Gross primary productivity (GPP)
Energy that is invested by primary producers in a given area and time period
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4
Net primary productivity (NPP)
Energy that is invested by primary producers in building new tissue or offspring
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5
Biomass
Organic material
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6
Consumers
Eat living organisms
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7
Primary consumers
Eat primary producers
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8
Secondary consumers
Eat primary consumers
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9
Tertiary consumers
Eat secondary consumers
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10
Decomposers
Obtain energy by feeding on the remains of other organisms or waste products
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11
Trophic level
Organisms that obtained energy from the same type of source
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12
Detritus
Dead animals and dead plant tissues
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13
Biomagnification
Increase in concentration in consumers at higher levels in a food chain
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14
Biogeochemical cycle
The path an element takes as it moves from abiotic systems through producers, consumers, and decomposes and bak again
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15
Soil organic matter
A complex mixture of partially and complexity decomposed detritus
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16
Watersheds
Areas drained by a single stream
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