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Ecosystem Test - 85

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Ecosystem Test - 85
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Weekly Quiz Competition
  • Question 1
    1 / -0
    How many equations are correct for Productivity

    (a) NCP=NPP-GSP
    (b) GPP=NPP+R
    (C) NPP=GPP-R
    (d) NSP=GSP-R
    (e) NSP=GPP-R
    (f) NPP=NCP+GSP
    Solution
    • This productivity refers to the gross production minus the loss by respiration and decomposition. This is also called as apparent photosynthesis or net assimilation.
    NPP = GPP – Respiration, hence (b) and (c) are corect statement. 

    • Similarly, Net secondary productivity (NSP) = Gross secondary productivity (GSP) - Respiration making (d) statement correct. 

    • In the plants, large amount of food is accumulated.  But, it is used by herbivores.  SO, after taking of the food by herbivores from plants, the remaining food is known as Net community productivity. 
    NCP  =   NPP - GSP  
    Where, NCP - Net community productivity & GSP  -  Gross secondary productivity. Hence, statements (a) and (f) are correct. 

    So, the correct option is 'A,B,C,D,F are correct'.
  • Question 2
    1 / -0
    Which of the following is not limitation of pyramid?
  • Question 3
    1 / -0
    Identify the type of ecological pyramid?

    Solution
    The living weight (biomass) of the members of the food chain present at any one time forms the pyramid of the biomass. In the grassland ecosystem, the characteristic feature of the pyramid of biomass is the gradual decrease of biomass at each trophic level i.e. from producers to consumers and thus their pyramid of biomass is upright in shape. But, in the case of the aquatic ecosystem, the producers are typically phytoplanktons with least biomass and the biomass increase gradually in each trophic level. Hence, the pyramid of aquatic ecosystems on the basis of biomass is inverted in shape.
    So, the correct answer is option C, Pyramid of aquatic ecosystem on the basis of biomass. 
  • Question 4
    1 / -0
    Which of the following statement incorrect regarding ecological succession?
  • Question 5
    1 / -0
    Given is one of the types of ecological pyramids. This type represents?

  • Question 6
    1 / -0
    The crucial species that determine the ability of large number of other species is termed as ______________ species.
  • Question 7
    1 / -0
    Which of the following is not a limitation of pyramid?
  • Question 8
    1 / -0
    Which is not true regarding ecosystem?
  • Question 9
    1 / -0
    The order of basic processes involved in succession is
  • Question 10
    1 / -0
    Which level in food chain has maximum energy?
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