Food chain and types of food chain, Biology

In an ecosystem various trophic levels are interlinked with each through a food chain. (the transfer of food energy from green plants through a series of organism with repeated eating and been ea....  Later is referred to as food chain). It can be defined as transfer of energy from one  trophic  level (eg. Producers) to next trophic level (eg. consumers). A very simple food chain is shown here.

All types of ecosystem possess two types of food chains.

1. Grazing food chain:

         It starts from producers (greenplants) through herbivores to carnivores. The shorter the food chain, the more is the amount of energy available to the last trophic level in an ecosystem.

(a)   Terrestrial food chain:

(i)           Grass-Grasshopper-Shrew-Hawak

(ii)         Grass-Rabbit-Fox-Wolf-Tiger

(iii)       Grass- Rat-Snake-Vulture

(b)   Aquatic food chains:

(i)          Phytoplankton-Zooplankton 1014_food chain.png

Small Fish  1014_food chain.png Large Fish 1014_food chain.png Shaark

(ii)        Phytoplankton1014_food chain.pngZooplankton

Fish 1014_food chain.pngCrane 1014_food chain.pngHawk.

2.  Detritus food chain:

        It starts from dead organic matter and goes to detritus feeding organism ( detrivores or microorganism) and  on to their predators. The ecosystem exhibiting detritus food-chain are less dependent on direct solar energy but chiefly depend on the influx of organic matter produced. A good example of a detritus food chain based on mangrove leaves are shown here.

 

        Mangrove leaves hawk. 1014_food chain.pngDetritus microorganism 1014_food chain.png crabs and shrimps 1014_food chain.pngsmall fish 1014_food chain.pnglarge fish. 

 

Food web: in nature food -chains are not isolated, but they are interconnected with each other and form food web. Thus ,food  web is defined as" a network of food  chains which are interconnected at various  trophic levels, so as to form a number of feeding connections amongst different organism of a biotic community".

For example in a grass land there are five simple food chains which are interlinked.

(i)        Grass- grass happer- hawk/vulture

(ii)      Grass-grass hopper-lizard-hawk/vulture

(iii)    Grass-rabbit-hawk/vulture

(iv)    Grass-mouse-hawk

(v)      Grass-mouse-snake-hawk.

Posted Date: 7/11/2012 6:55:28 AM | Location : United States







Related Discussions:- Food chain and types of food chain, Assignment Help, Ask Question on Food chain and types of food chain, Get Answer, Expert's Help, Food chain and types of food chain Discussions

Write discussion on Food chain and types of food chain
Your posts are moderated
Related Questions
Polynephritis in cattle Contagious bovine polynephritis is a specific infection of urinary tract of cattle. The causative agent is Corynebacterium renale, a rod shaped gram-po

The use and transfer of energy in all cells involves same compound, ATP. The letters ATP stand for chemical: a) Adenosine triphosphate b) Aluminum trioxide c) Atrophine t

Q. What are the Yeasts? Like mold, the term "yeast" is commonly used but hard to define. As used here it refers to those fungi which are generally not filamentous but unicellul

Q. What is the difference between spermatocyte I and spermatogonium? The male germ cells are the spermatogonia (diploid cells, 2n) situated in the testicles and they mature an

Management of waste amalgam and wastes containing mercury: As all of us know that amalgam is used for restorations very widely.An operator of a dental operation that produces w

Central Nervous System   Hypertension is one of the leading causes of cerebrovascular disease. It has been associated with accelerated age related cognitive decline. The most d

Veterinary medicine Veterinary medicine is a branch of science that deals with diagnosis, treatment and control of diseases in animals such as livestock, domesticated animals,

Explain Adverse effects of Zidovudine  It include anemia, neutropenia, nausea, vomiting, headache, fatigue, confusion, malaise, myopathy, hepatitis, and hyperpigmentation of or

Q. Explain about Hyperglycemia? It is a Greek term: hyper -meaning excessive; glyc- meaning sweet; and emia- means "of the blood". It is a condition in which an excessive amoun

Q. How is the chromosome region where the centromere is located called, and how chromosomes classified in the relation to the position of their centromere? The chromosome regio