Primary production - ecosystem, Biology

Assignment Help:

Primary Production - Ecosystem

Energy accumulated by plants during photosynthesis is called production or more specifically primary production. It is the first and the basic form of energy stored in an ecosystem. Production is defined technically as the amount of biomass or organic matter produced per unit &ea in a given period. It can be expressed in terms of 2 weight (g/m2) or energy {kcal/m).

The rate at which energy accumulates is  known as primary productivity. It is expressed in terms of kcal/m /yr or g/m2/yr. In case of plants, primary production is generally differentiated into two distinct categories, namely gross primary production (GPP) and net primary production (NPP). Gross primary production refers to the total amount of solar energy fixed into organic matter by primary producers through photosynthesis. A considerable portion of the solar energy fixed by plants (GPPI. is utilised by plants themselves in respiration (R) to get the energy needed for their metabolism and for other vital functions. The amount of energy left after respiratory consumption (R) is incorporated into new body tissue (growth) or is used for producing new individuals (reproduction). The amount of biomass or organic matter accumulated by plants per unit area in a given period is called net primary production. The overall relationship between GPP and NPP can be written as:

GPP - R = NPP or GPP = NPP + R

From this equation you might have noticed  that whatever  energy is fixed by plants (GPP) some of  it  is used  for their own maintenance  (R) and only remaining  (NPP) is  available for the next trophic  level.  So net primary production is the only energy available for the next trophic level.


Related Discussions:- Primary production - ecosystem

Create a standard curve, Explain how you would create a standard curve to d...

Explain how you would create a standard curve to determine the amount of orange dye that had been added to a can of orange soda

Do sponges have circulatory system, Q. Do sponges have circulatory, nervous...

Q. Do sponges have circulatory, nervous and excretory systems? Sponges do not have a nervous system neither excretory system nor circulatory system.

Mitral valve replacement, Mitral Valve Replacement :  When mitral...

Mitral Valve Replacement :  When mitral valve replacement for a calcified, stenotic valve is done, usually it is a classical procedure removing leaflets, their chordae an

Why membrane became permeable to sodium ions, At 1 AM, an impermeable membr...

At 1 AM, an impermeable membrane separates a 1 liter solution of 1M NaCl in the left compartment from a 1 liter solution containing both 1M NaCl and 1M KCl in the right compartment

Parathyroid disorders, PARATHYROID DISORDERS - (i) Hypoparathyroidism ...

PARATHYROID DISORDERS - (i) Hypoparathyroidism (deficiency of PTH) . It causes the lowering of blood calcium level. This increases the excitability of nerves and muscles, caus

Zoology, General characters of phylum protozoa

General characters of phylum protozoa

Tolerance range, what is the tolerance range of man and tillapia

what is the tolerance range of man and tillapia

Ecosystem influence the biological diversity, Q. How does the vegetal strat...

Q. How does the vegetal stratification of an ecosystem influence the biological diversity? The vegetal stratification of the ecosystem like the strata of the Amazon Rainforest,

Viruses, are viruses cellular organisms

are viruses cellular organisms

Define mechanisms for antinutritional effect on human, Define mechanisms fo...

Define mechanisms for antinutritional effect on Human? There are several possibilities: reduced availability of amino acids to cancer cells by reversing the carcinogen-induced

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd