ECOLOGY
ENERGY FLOW AND PRIMARY PRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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biomass per unit area
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J m-2yr-1
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g m-2
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energy per unit area
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Detailed explanation-1: -Productivity is expressed in units of mass per volume per unit of time, such as grams per square meter per day (gm−2d−1).
Detailed explanation-2: -Primary productivity is usually determined by measuring the uptake of carbon dioxide or the output of oxygen. Production rates are usually expressed as grams of organic carbon per unit area per unit time.
Detailed explanation-3: -In equation form, we have net production efficiency = (production / assimilation), or for plants = (NPP / GPP). These ratios measure the efficiency with which an organism converts assimilated energy into primary or secondary production.
Detailed explanation-4: -The rate of synthesis of energy containing organic matter or biomass by any trophic level per unit area in unit time is described as its productivity. It is measured as weight(e.g., g/m2/yr) or energy (e.g., kcal/m2/yr).