The trophic levels & the food chain.!!

TROPIC LEVEL

The different feeding level of organisms in an ecosystem are called tropic level.Producers make the first tropic level in all ecosystem.Because they make their own food,producers are called autotrophs. Autotrophs are the sole point of enter for new energy into the ecosystem.Consumers form the second and higher tropic level in the ecosystem.Because they cannot produce their own food and must obtain nourishment by eating other organisms, consumers are called hetetrophs.Primary consumers that eat producers form the second tropic level and secondary consumers form the third tropic level.Omnivores and decomposers  feed  at all tropic level.Each tropic level depends completely on the level below it.

 Food chain & food web.

The feeding relationship among organisms at different tropic level form a chain, the food chain.A food chain may be defined as a series o organisms that transfers food between the tropic level of an ecosystem.All food chain begin with producers which are usually plants in an ecosystem.The food chain continues to herbivorse at the next tropic level,followed by one or more level of carnivorse ,the carnivorse are consumed by decomposers .And example of food chain is shown below.

 

No ecosystem is simple enough to be represented by a simple food chain.As most consumers feed on more then one type of food and some consumers feed on more then one tropic level.A food web is a network of food chain representing the feeding relationship among the organisms in an ecosystem.An example of food web is given.

 

The passage of energy in on way direction in an ecosystem is known as energy flow.In an ecosystem energy flow occurs in food chain.In which energy from food passes from one organism into the other in sequence.
Energy from the sun enters an ecosystem when producers uses the energy to make matter through photosynthesis.Consumers take in this energy when they eat producers or other consumers.In this way energy moves on from one tropic level into the other.At each tropic level some energy is lost as heat due to some activities of organisms like keeping the body warm or other physical activities.The energy  which dissipates into the atmosphere cannnot be used in the next tropic level.Only energy used to make biomass is available. 

ECOLOGICAL PYRAMIDS 

Ecological pyramids shows the relative amount of energy in an ecosystem.Each ecological pyramid is divided into sections each section represent one tropic level.An ecologist pyramid can indicate the total biomass,number of organisms,and number of organisms in a food web.

PYRAMIDS OF NUMBER..

The pyramids of number show the total amount of of organisms in each tropic level in an ecosystem.Each successive tropic level is occupied by fewer organisms.Such that the number of zebra and other wild beast is greater then carnivores such that lion. 

 

PYRAMIDS OF BIOMASS..

The pyramids of biomass represents the total amount of biomass at each tropic level.Biomass means the total amount of matter at each tropic level.The pyramids of biomass allow a progressive amount of reduction at each tropic level.

  

 

PYRAMIDS OF ENERGY..

The pyramids of energy represents the total amount of energy contents in the biomass of a tropic level.This pyramids represents that the total amount of energy that reach the next successive level is almost least as compare to the level below it.

 

HEALTHY AND GOOD FOOD FOR 

HUMAN ..

As most people have a miss concept that vegetarians have less energy or strength as compare to the meat eaters.But if we look closely the first energy contents that enters into the ecosystem are consumed by the producers and then consumers eat producers in order to obtain energy.And we in return eat the consumers to obtain energy.So why don't we directly obtain it by consuming producers??