Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

AcDec 2015 > Science 46-51 > Flashcards

Science 46-51 Flashcards

1
Q

What does an ecosystem level approach consider in the management of natural resources?

A

The interconnected relationships between multiple biotic systems

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

Pools=

A

Amount or quantity

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

Fluxes=

A

Transfer or flows

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

What are some examples of ecosystem processes?

A

photosynthesis and decomposition

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

What do ecosystem level studies seek to understand?

A

The factors that determine the pools and fluxes of material energy in an ecosystem

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

Define ecosystem processes.

A

Ways that energy and materials are transferred from one pool to another

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

What is the ultimate source of energy?

A

The sun

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

What are the two forms of energy?

A

Kinetic and potential

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

Explain the first law of thermodynamics.

A

Energy cannot be created nor destroyed

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

Explain the second law of thermodynamics.

A

Energy disperses from being localized to spread out, unless it is prevented from doing so.

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

What are the two major steps of photosynthesis?

A

Harvesting energy from sunlight and the fixing of carbon to generate carbohydrates

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

What determines the supply of energy to organisms?

A

The rate of photosynthesis

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

Define autotrophic organisms.

A

Organisms which produce organic compounds

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

Define primary productivity.

A

The rate that sunlight is converted by autotrophic organisms via photosynthesis into organic compounds

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

What is Gross Primary Productivity (GPP)?

A

The total rate of photosynthesis or the total energy obtained by autotrophs.

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

The rate of energy stored after accounting for the energy expended is referred to as…

A

Net Primary Productivity (NPP)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is biomass?

A

Stored energy found at a given area at a given time

18
Q

What does ecosystem ecology study?

A

The links between multiple organisms and their physical environment as an integrated system

19
Q

What controls the rates of primary productivity? (In a terrestrial ecosystem)

A

Temperature, heat, and nutrients

20
Q

We see a pattern of increasing NPP with increasing ______________________.

A

Nutrient availability

21
Q

What controls primary productivity in an aquatic ecosystem?

A

Temperature, light, and nutrient availability

22
Q

Light availability decreases with the depth in what?

A

The water column

23
Q

What perform the majority of the oceans primary productivity?

A

Free-floating algae, protists, and cyanobacteria

24
Q

What are the two most important nutrients for phytoplankton?

A

Nitrate and phosphate

25
Q

Define upwelling.

A

When cold, nutrient rich waters swell up to the surface to replace warm, nutrient lacking water which was previously on the surface

26
Q

Certain bacteria have evolved to live without…

A

Sunlight

27
Q

What is chemosynthesis?

A

The process by which microbes create energy by converting carbon molecules and nutrients into organic matter in the absence of sunlight

28
Q

All animals, fungi, and some bacteria are…

A

Heterotrophs

29
Q

Define heterotrophs.

A

Consuming plant or animal material for maintenance and growth

30
Q

When heterotrophic organisms produce biomass it is known as?

A

Secondary production

31
Q

Explain biogeochemical cycles.

A

Cycles of nutrient movement through ecosystem components

32
Q

What is the key to nutrient recycling?

A

Decomposition

33
Q

What are the dominant decomposers of dead animal material?

A

Bacteria

34
Q

What are the dominant decomposers of plant material?

A

Fungi

35
Q

The Undecomposed organic matter on the soil surface.

A

Litter

36
Q

Define mineralization.

A

The process where bond between carbon molecules and inorganic nutrients are broken, making them available for uptake by plant roots

37
Q

Where would decomposition occur at a faster rate?

A

Areas with warmer temperatures and greater amounts of moisture available

38
Q

What must nitrogen be in the form of in order for plants to absorb it?

A

Ammonium or nitrate

39
Q

What is nitrogen fixation

A

The assimilation of nitrogen into organic compounds

40
Q

Where is the phosphate in the earth mainly stored?

A

Soil and rocks

AcDec 2015 (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions