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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In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?

1. Gross primary productivity is always more than Net primary productivity.
2. Gross primary productivity and Net primary productivity are one and the same.
3. There is no relationship between Gross primary productivity and Net primary productivity.
4. Gross primary productivity is always less than net primary productivity.

Subtopic:  Ecosystem Productivity |
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