In an ecosystem, if the Net Primary Productivity (NPP) of first trophic level is \(100 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1},\) what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
1. \(x\left(\mathrm{kcal}~ \mathrm{m}^{-2}\right) y r^{-1}\)
2. \(10 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\)
3. \(\dfrac{100 x}{3 x}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\)
4. \(\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}\)
Subtopic:  Ecosystem Productivity | Energy Flow |
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In the equation 

GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation 
2. Photosynthetically active radiation 
3. Respiratory quotient 
4. Respiratory loss
Subtopic:  Ecosystem Productivity |
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Frugivorous birds are found in large numbers in tropical forests mainly because of :
1. lack of niche specialisation.
2. higher annual rainfall.
3. availability of fruits throughout the year.
4. temperature conducive for their breeding.
Subtopic:  Components & Types of Ecosystems | Ecosystem Productivity |
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The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:
1. Secondary production
2. Primary production
3. Gross primary production
4. Net primary production
Subtopic:  Ecosystem Productivity |
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In the equation GPP – R = NPP,  R represents:
1. Environment factor
2. Respiration losses
3. Radiant energy
4. Retardation factor

Subtopic:  Ecosystem Productivity |
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Which ecosystem has the maximum biomass?

1. Grassland ecosystem

2. Pond ecosystem

3. Lake ecosystem

4. Forest ecosystem

Subtopic:  Ecosystem Productivity |
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The mass of living material at a tropic level at a particular time is called:

1. gross primary productivity
2. standing state
3. net primary productivity
4. standing crop

Subtopic:  Ecosystem Productivity |
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In an ecosystem, the rate of production of organic matter during photosynthesis is termed as:

1. net primary productivity

2. gross primary productivity

3. secondary productivity

4. net productivity

Subtopic:  Ecosystem Productivity |
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Secondary productivity is the rate of formation of new organic matter by:

1. Parasite

2. Consumer

3. Decomposer

4. Producer

Subtopic:  Ecosystem Productivity |
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The biomass available for consumption by the herbivores and the decomposers is called:

1. net primary productivity

2. secondary productivity

3. standing crop

4. gross primary productivity

Subtopic:  Ecosystem Productivity |
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