Chapter 46: The Global Ecosystem Flashcards

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1
Q

ecosystem function

A

the dynamic processes by which the abiotic and biotic components of an ecosystem exhange and transform energy

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2
Q

Net Primary Productivity

A

the rate per unit of area at which an ecosystem produces primary producer biomass

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3
Q

Which ecosystems are the most productive?

A

Total- swamp and marshes

terrestrial- tropical rainforest

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4
Q

What are the only productive deep water areas?

A

hydrothermal vents

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5
Q

What is essential for chemicals to be in order to be used by organisms?

A

in the right form and in the right placce

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6
Q

Biosphere

A

the thin skin at Earth’s surface where atmosphere, land, and water are in contact with one another and where organisms live

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7
Q

Biogeochemical cycles

A

movement of matter along Earth’s compartments that is caused by biological, geological, and chemical processes

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8
Q

Pool of a molecule

A

total amount of a molecule

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9
Q

fluxes

A

flows

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10
Q

what is the driving force behind the hydrological cycle?

A

evaporation `

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11
Q

greenhouse gas

A

absorbs infrared radiation

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12
Q

nitrogen fixation

A

break the triple bond between two nitrogen atoms, turning N2 into ammonium
done by microbes
mostly bacteria in soil/with plants on land, btu also happens in fungal gardens of leaf cutter ants

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13
Q

denitirification

A

turning oxides of nitrogen into N2 to complete nitrogen cycle

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14
Q

eutrophication

A

nutrient stimulated increases in primary productivity
can result in such rapid growth of phytoplankton that consumers are like AHHHH I CAN NOT YOU ALL!!!!! (think like people at a buffet)
respiration by all these phytoplankton and decomposers depletes oxygen

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15
Q

dead zones

A

areas devoid of aquatic life because the phytoplankton and decomposers just had to deplete the oxygen levels to Wwaaayyyyy below tolerance (but isn’t their fault, happens because of nutrients)

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16
Q

greenhouse effect

A

heat emitted by earth’s surface is partially absorbed by atmospheric molecules that radiate photons back to the surface and keep energy in Earth’s system as heat

17
Q

Fossil Fuels

A

formed by natural processes such as anaerobic decomposition of buried dead organisms