Productivity and decomposition
- Which of the following is the unit of productivity of an Ecosystem? Answer: 4. (KCal m⁻²)yr⁻¹ Key idea: Productivity is the rate of biomass or energy production per unit area per unit time. So it needs an are... 1
- Given below are two statements :Statement I : The primary source of energy in an ecosystem is solar energy.Statement II : The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).In the l… Answer: 3. Statement I is correct but statement II is incorrect Key idea: Statement II defines the wrong term. Statement I is correct: solar... 1
- In the equationGPP - R = NPPGPP is Gross Primary ProductivityNPP is Net Primary ProductivityR here is ______. Answer: 4. Respiratory loss Key idea: Net primary productivity is the gross primary productivity left after plants use some for their own re... 1
- Identify the correct statements :A. Detrivores perform fragmentation.B. The humus is further degraded by some microbes during mineralization.C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching.… Answer: 2. A, B, C only Key idea: Check each statement on decomposition. A is true: detritivores break detritus into smaller pieces (fragmen... 1
- Detritivores breakdown detritus into smaller particles. This process is called : Answer: 3. Fragmentation Key idea: Detritivores such as earthworms break detritus into smaller particles. This step is fragmentation. It is... 1
- Given below are two statements :Statement I :Decomposition is a process in which the detritus is degraded into simpler substances by microbes.Statement II :Decomposition is faster if the detritus is rich in lignin and chitinIn the light of the above… Answer: 4. Statement I is correct but Statement II is incorrect Statement I: decomposition breaks detritus into simpler substances through m... 1
- In the equation GPP-R=NPPR represents : Answer: 4. Respiration losses Net primary productivity is gross primary productivity minus the energy used by plants in respiration. So NPP... 1
- In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct ? Answer: 2. Gross primary productivity is always more than net primary productivity. Net primary productivity = Gross primary productivity mi... 1