Ch 55: Dynamics of Ecosystems

Question 1

Ecosystem

Answer 1

all org.s that live in a particular place with the a-biotic environment with which they live

Question 2

Two Forms of Usable Energy:

Answer 2

Light - used by photoautotrops and Chemical-bond - used by chemoautotrophs and herterotrophs

Question 3

1st law of Thermodynamics

Answer 3

energy is neither created nor destroyed

Question 4

2nd law of Thermodynamics

Answer 4

when energy is created, heat is lost

Question 5

when describing trophic levels, productivity is

Answer 5

the rate at which org.s in trophic level collectively synthesize organic mater

Question 6

Gross Primary Productivity (GPP) –

Answer 6

raw rate at which producers synthesize new organic matter

Question 7

Net Primary Productivity (NPP) –

Answer 7

the GPP less the rate of respiration

Question 8

Secondary Productivity

Answer 8

is productivity measured at the heterotrophic level. involves growth an reproduction

Question 9

Biomas in the trophic level is

Answer 9

the amount of organic matter present at a particular time. this is a static property

Question 10

where is the highest net primary productivity at?

Answer 10

the equator

Question 11

what do Ecological Pyramids illustrate?

Answer 11

energy loss between trophic levels

Question 12

when are Ecological Pyramids inverted?

Answer 12

when primary producer has a high turnover rate (zoo plankton)

Question 13

what are Biogeochemical Cycles ?

Answer 13

the cycle biochemicals go through– (water, soil, animals, weathering, erosion)

Question 14

Water Cycle Reservoirs:

Answer 14

atmosphere
lakes
rivers

Question 15

Water Cycle Processes

Answer 15

precipitation
evaporation
evapotranspiration

Question 16

Water Cycle Human Interaction:

Answer 16

over consumption

pollution

Question 17

Carbon Cycle Reservoirs:

Answer 17

atmosphere

org.s

Question 18

Carbon Cycle Processes:

Answer 18

cellular resperation

photosynthesis

Question 19

Carbon Cycle Human Interaction:

Answer 19

burning fossil fuel

pollution

Question 20

Nitrogen Cycles Reservoirs:

Answer 20

atmosphere
org.s
sedimentation in aquatic biomes
soil in terrestrial biomes

Question 21

Nitrogen Cycles Processes:

Answer 21

fixation
denitrofication
recomposition

Question 22

Nitrogen Cycles Human Interaction:

Answer 22

fertilizer

Question 23

Phosphorus Cycle Reservoirs:

Answer 23

sedimentary rock
soil
org.s

Question 24

Phosphorus Cycle Processes:

Answer 24

weathering
decomposition
consumption

Question 25

Phosphorus Cycle Human Interaction:

Answer 25

fertilizer run off

Question 26

Nutrient Cycling in the Hubbard Brook Experimental Forest proved

Answer 26

that deforestation caused a loss of nitrogen and runoff