Chapter 46: The Global Ecosystem Flashcards Preview

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Flashcards in Chapter 46: The Global Ecosystem Deck (17):
1

ecosystem function

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

2

Net Primary Productivity

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

3

Which ecosystems are the most productive?

Total- swamp and marshes
terrestrial- tropical rainforest

4

What are the only productive deep water areas?

hydrothermal vents

5

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

in the right form and in the right placce

6

Biosphere

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

7

Biogeochemical cycles

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

8

Pool of a molecule

total amount of a molecule

9

fluxes

flows

10

what is the driving force behind the hydrological cycle?

evaporation `

11

greenhouse gas

absorbs infrared radiation

12

nitrogen fixation

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

13

denitirification

turning oxides of nitrogen into N2 to complete nitrogen cycle

14

eutrophication

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

15

dead zones

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)

16

greenhouse effect

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

Fossil Fuels

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