Why did the energy flow in tropic level or ecosystem is unidirectional or cycilic?
Answers
Answer:
Energy flow in ecosystem:
The process of transfer of energy to various trophic level of food chain is known as flow of energy.
Energy flow in ecosystem from energy source to autotrophs to heterotrophs.
For most ecosystem the energy source is the sun and the autotrophs are the green plants and BGAs. The solar energy that is captured in as ecosystem is based on the amount of photosynthesis that occur there.
The energy flow is best described by net primary productivity(NPP)= Gross primary productivity (GPP)- Respiration (Rp)
NPP= GPP-Rp
Secondary productivity is the amount of bio-mass produced by consumers. It is dependent on the amount of energy made available by primary producers and so on.
The entire process of energy floe is summarized in following points;
The flow of energy in an ecosystem is always linear ie uni direction
At each energy step in food chain, the energy received by the organisms is used for its own metabolism and maintenance. The left over energy is passed to next higher trophic level. Thus the energy flow decreases with successive trophic level.
Flow of energy follows the ecological rule of 10%.