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

Tree, what is a seed?

what is a seed?

Reason''s for mendel''s success, REASON'S FOR MENDEL'S SUCCESS 1.      ...

REASON'S FOR MENDEL'S SUCCESS 1.         Mendel selected only pure breeding varieties of pea ( Pisum sativum ) for his experiments. 2.         Mendel took only those traits

Explain the term ferns, Explain the term Ferns? Ferns are plants that...

Explain the term Ferns? Ferns are plants that have vessels that conduct water, minerals, and nutrients, and reproduce through spores, rather than seeds. Ferns are therefore o

What is the Evolution of migration, Evolution of migration Eg Be...

Evolution of migration Eg Benefits associated with migratory flights must be greater than those associated with staying in Alaska and having to tolerate seasonal changes

Production of disease-free plants, Production of Disease-free Plants U...

Production of Disease-free Plants Under normal conditions plants are infected by a wide range of pathogens such as bacteria, fungi, viruses, viroids, and insects like nematode

Self quiz, levels of biological organization in order from smallest to larg...

levels of biological organization in order from smallest to largest

Fungi, what is the symmetry of fungi?

what is the symmetry of fungi?

Explain the superficial minor burns, Explain the Superficial Minor Burns? ...

Explain the Superficial Minor Burns? Superficial minor bums are immersed immediately in cool water if possible. The burn is carefully cleaned to prevent infection. If dirt is d

Explain basic function of the myelin sheath, Q. What is the function of the...

Q. What is the function of the myelin sheath? Do all axons present a myelin sheath? The function of the myelin sheath is to improve the speed and safety of the neural impulse t

Explain the history of nutrition, Explain the History of Nutrition? Kno...

Explain the History of Nutrition? Knowledge of human nutritional needs and relationship between diet and health was placed on a modern scientific footing only since the 19th ce

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