Importance value index (ivi) - synthetic characters, Biology

Assignment Help:

Importance Value Index (IVI) - Synthetic Characters

In any study of community, the quantitative value of each of the frequency density, and cover has its own importance. But the total picture of ecological importance cannot be obtained by any one of these alone. For instance, frequency gives an idea as to how a species is dispersed in an area but we do not get any idea about its number or the area covered. Density gives an idea about the numerical strength and 40 on. To have an overall picture of ecological importance of a species with respect to the community structure, the percentage values of the relative frequency, relative density and dominance are added together and this value out of 300 is called the Importance Value Index or IVI of the species. IVI can also be ascertained by using diagrammatic representation in the following manner. Draw a circle and divide it into four equal segments by drawing two lines at right angles to each other passing through the centre.

2468_Importance Value Index (IVI).png

Figure: Polygraphic method of showing sociological characters of individual species


Related Discussions:- Importance value index (ivi) - synthetic characters

Feline calcivirus infection, Feline calcivirus infection This disease i...

Feline calcivirus infection This disease is caused by a virus under the family Caliciviridae. Its symptoms  include rhinitis, tracheitis and pneumonia. The animals are lethargi

What are analogies for a nucleolus, What are analogies for a nucleolus? ...

What are analogies for a nucleolus? If the nucleolus is the president of a factory then the nucleolus is the manager

Define biological hazards, Normal 0 false false false E...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Define reagent required and methodology for barfoed test, Define reagent re...

Define reagent required and methodology for Barfoed Test? Reagents - Solutions of glucose, fructose, galactose, lactose, maltose, sucrose and starch - Barfoed's reagent

Elaborate the following term in detail - macronucleus, Elaborate the follow...

Elaborate the following term in detail - Macronucleus. One of two types of dimorphic nuclei found in ciliate protozoans. Macronucleus contains multiple copies of genome (polypl

Human heart is partially non-functional, If due to some injury the chordae ...

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect? 1. The flow of blood into t

Effect of alcoholic beverage, Q. Why does the urinary volume increase when ...

Q. Why does the urinary volume increase when alcoholic beverages are ingested? Alcohol inhibits the ADH (antidiuretic hormone) secretion by the hypophysis and Low ADH reduces t

Cooking loss and quality of products, Coo k in g loss and quality Yi...

Coo k in g loss and quality Yields and cooking losses of products are important as these determine acceptability and economics of products. Higher cooking losses increase th

How do birds reproduce, How do birds reproduce? Birds, like each verteb...

How do birds reproduce? Birds, like each vertebrate, have sexual reproduction. Their embryos develop within shelled eggs having extraembryonic membranes and outside the mother'

What is bioremediation, Q. What is bioremediation? The Bioremediation i...

Q. What is bioremediation? The Bioremediation is the use of microorganisms, like protists, bacteria and fungi to degrade noxious substances turning them into non toxic or less

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