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Ecosystem > * > Flashcards

* Flashcards

1
Q

Amount of carbon nitrogen phosphorus present in soil at any particular time

A

Standing state

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2
Q

Standing crop varies in different ecosystem

T/F

A

T

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3
Q

Another name of nutrient cycling

A

Biogeochemical cycle

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4
Q

Two types of nutrient cycling

A

Gaseous

Sedimentary

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5
Q

N2

C4 cycle is

A

Gaseous

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6
Q

S6

P5 cycle

A

Sedimentary

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7
Q

C constitute _____% of dry weight of organisms

A

49

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8
Q

____% of C in ocean

A

71

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9
Q

Atm C is

A

1%

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10
Q

Natural reservoir of phosphorus

A

Rock

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11
Q

Rock contain P as

A

Phosphate

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12
Q

Community near equilibrium with the environment

A

Climax community

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13
Q

Entire sequence of communities that successfully change in a given area

A

Sere

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14
Q

The Individual transitional communities are called

A

Seral

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15
Q

Species that invade the bare area

A

Pioneer

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16
Q

Primary succession on rock are usually

A

Lichen

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17
Q

Primary succession in water pioneer are

A

Phytoplankton

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18
Q

Arrange

Reed swamp, scrub stage, submerged free floating, forest, marsh meadows, submerged plant stage, phytoplankton

A 
Phytoplankton
Reed swamp
Submerged plant
Marsh meadows
Submerged free floating
Scrub stage
Forest
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19
Q

Base of each pyramid

A

Producers

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20
Q

3 type of pyramid

A

Number
Biomass
Energy

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21
Q

Pyramid of number in grassland

A

Upright

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22
Q

Pyramid of biomass

A

Upright

23
Q

Pyramid of biomass of ocean

A

Inverted

24
Q

Pyramid of energy is always

A

Upright

25
Q

Of the incident.solar radiation less than ______ is PAR

A

50

26
Q

Plants capture only _______ par

A

2-10%

27
Q

Molluscs in aquatic ecosystems

A

Herbivores

28
Q

Secondary consumers

A

Primary carnivores

29
Q

Primary consumer

A

Herbivores

30
Q

______ begins with dead organic matter

A

DFC

31
Q

Fungi and bacteria are

A

Decomposer

32
Q

In aquatic ecosystems _____ is major conduit of energy glow

A

GFC

33
Q

In terrestrial ecosystems the major fraction of energy is in

A

DFC

34
Q

Each trophic level has a certain mass of living material at a particular time_________

A

Standing crop

35
Q

The standing crop is measured in

A

Mass of living organisms (biomass)

36
Q

Measurement of biomass is more accurate in

A

Dry weight

37
Q

Components of ecosystem

A

Productivity
Decomposition
Energy flow
Nutrient cycling

38
Q

Primary production

A

Amount of biomass or organic matter produced per unit area of plants during photosynthesis

39
Q

The rate of biomass production

A

Productivity

40
Q

Gpp

A

Rate of production organic matter during photosynthesis

41
Q

NPP

A

GPP-RL

42
Q

The available biomass for the consumption of heterotroph

A

NPP

43
Q

Rate of formation of new organic matter by consumer

A

Secondary productivity

44
Q

Raw material for decomposition

A

Detritus

45
Q

Imp steps of decomposition

A 
Fragmentation
Leaching
Catabolism
Humification
Mineralisation
46
Q

Detritivores breaks down the detritus into smaller particles

A

Fragmentation

47
Q

Water soluble inorganic materials go down itni soil horizon

A

Leaching

48
Q

Bacterial and fungal enzymes degrade the detritus into simple inorganic substance

A

Catabolism

49
Q

Steps which occurs on detritus

A

Frag
Leach
Cata

50
Q

Steps occuring on decomposition in soil

A

Humi

Miner

51
Q

Humus is ______ in nature

A

Colloidal

52
Q

The humus is degraded by some microbes and release of inorganic nutrients occur

A

Mineralisation

53
Q

Decomposition is CO2 requiring process T/F

A

F

Oxygen requiring

54
Q

_______&_______ate most imp climatic factors

A

Temp

Soil moisture

Ecosystem (1 decks)

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