Primary productivity refers to the

the rate of photosynthesis in plants and photosynthetic bacteria as compared to the rate of plant consumption by herbivores

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the total amount of light energy converted to organic compounds in a given area per unit time by producers.

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rate of decomposition by the detritivores.

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total biomass of the photosynthetic organisms in the ecosystem.

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Solution

The correct option is B the total amount of light energy converted to organic compounds in a given area per unit time by producers.
Primary productivity: can be defined as the rate of organic matter produced in a given area per by the first level of trophic organization. The first level of organization is the producer.

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Similar questions

Q. Identify the incorrect pair.

I. Net Primary Productivity - Available organic matter for the consumers
II. Primary Productivity - Amount of production of organic matter during photosynthesis
III. Gross Primary Productivity - Amount of biomass produced per unit area over a certain period of time by plants during photosynthesis

Q. Assertion :Amount of organic matter synthesised by producers per unit time and per unit area during the process of photosynthesis is referred to as net primary productivity. Reason: Primary productivity is usually high and sustained throughout the year in temperate areas due to abundance of sunlight.

Q. Gross primary productivity is the rate at which organic matter is synthesised by producers per unit area and time.

Match List–I with List–II and select the correct answer using the codes given below the lists

$\begin{matrix} L i s t I & L i s t I I A . A . T h e a m o u n t o f e n e r g y a c c u m u l a t i o n i n & 1. G r o s s p r i m a r y p r o d u c t i v i t y . g r e e n p l a n t s t h r o u g h t h e p r o c e s s o f p h o t o s y n t h e s i s B . T h e t o t a l o r g a n i c m a t t e r s y n t h e s i z e d b y & 2. P r i m a r y p r o d u c t i v i t y t h e p r o d u c e r s i n t h e p r o c e s s o f p h o t o s y n t h e s i s p e r u n i t t i m e a n d a r e a . C . R a t e o f s t o r a g e o f o r g a n i c m a t t e r & 3. S e c o n d a r y p r o d u c t i v i t y i n p l a n t t i s s u e s i n e x c e s s o f t h e r e s p i r a t o r y u t i l i z a t i o n d u r i n g t h e m e a s u r e m e n t p e r i o d D . R a t e o f e n e r g y s t o r a g e a t c o n s u m e r l e v e l & 4. N e t p r i m a r y p r o d u c t i v i t y \end{matrix}$

Q. The amount of biomass product per unit area over a time period by plants during photosynthesis is called

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