Food chain and types of food chain, Biology

Assignment Help:

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.


Related Discussions:- Food chain and types of food chain

Prawn, explain excretory system of prawn?

explain excretory system of prawn?

Preservation of tooth structure, Q. Preservation of Tooth Structure? Fi...

Q. Preservation of Tooth Structure? Fixed partial dentures have been considered the standard of treatment prior to advent of implant therapy. However, to obtain optimal esthe

Explain disease dengue, Dengue Dengue fever is a viral disease transmi...

Dengue Dengue fever is a viral disease transmitted by mosquito bites that occurs worldwide in tropical and subtropical areas. Major epidemics have occurred in recent years in

Calculate the number of drops of the stock solution, Assume that you have a...

Assume that you have a stock solution of epinephrine at a concentration of 1mg/ml. Further assume that there are 20 drops/ml. a. Calculate the number of drops of the stock solution

Guanine, Guanine is one of the nitrogenous bases in the nucleic acids, gua...

Guanine is one of the nitrogenous bases in the nucleic acids, guanine is one of the two purine bases.

Show major signs of diabetes, Q. What are the three major signs of diabetes...

Q. What are the three major signs of diabetes? The three major signs of diabetes mellitus are known as the diabetic triad- polydipsia, polyuria and polyphagia. Polyuria is t

Define laser tweezers technology - pure culture techniques, Define Laser Tw...

Define Laser Tweezers Technology? In addition to above said classical methods, advance technologies can be used for obtaining pure cultures. Laser tweezers technology is useful

Define technique of paper chromatography, Define Technique of Paper chromat...

Define Technique of Paper chromatography? Paper chromatography is used as 1. Ascending, 2. Descending or 3. Horizontal technique (circular paper chromatography) It is De

Categories of air pollutants, Categories of Air Pollutants From the ab...

Categories of Air Pollutants From the above list you can see that the air pollutants can be broadly classified into the following two categories: Primary Pollutants

Phylum protozoa, hints for preparing for college assignment any outline

hints for preparing for college assignment any outline

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