Unit 6: Chapter 20: Production Flashcards

1
Q

Energy in an ecosystem originates with…

A

Primary producers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Total ecosystem photosynthesis

A

Gross primary production (GPP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What percentage of the ground area does a leaf of Leaf Area Index (LAI) 0.6 cover?

A

60%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What layer are the emergent trees at the top of a canopy?

A

Layer 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

NPP = GPP - R meaning

A

Net primary production = Gross primary production - respiratory losses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Plants allocate NPP to roots or shoots depending on requirements. What environments would warrant highest shoot and highest root allocation?

A

Tropical forest

Temperate grassland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

NPP is a measure of ecosystem health and influences…

A

Carbon cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

By remote sensing reflection ___ can be estimated on a global scale

A

NPP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Direct measure of CO2

A

Net Ecosysem Exchange (NEE)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Explain NEE = GPP - (AR + HR)

A

Net ecosystem exchange = Gross primary production - Auototrophic and heterotrophic respiration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

NPP is constrained by what types of factors?

A

Physical and biotic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Global precipitation and Global temperature combo for high NPP

A

Moderate precipitation and high temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

T/F On graph of GPP and R GPP is higher atm but will switch on the future

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In aquatic ecosystems NPP is controlled primarily by…

A

Nutrient availability

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Still water ecosystems

- Low phosphorus/nitrogen limits NPP

A

Lentic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Moving water ecosystems

- Usually limited by turbidity

A

Lotic

17
Q

NPP of these ecosystems usually limited by nitrogen

A

Ocean ecosystems

18
Q

Highest average NPP of aquatic environments

A

Estuaries