Importance value index (ivi) - synthetic characters, Biology

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

Posted Date: 1/19/2013 8:01:49 AM | Location : United States







Related Discussions:- Importance value index (ivi) - synthetic characters, Assignment Help, Ask Question on Importance value index (ivi) - synthetic characters, Get Answer, Expert's Help, Importance value index (ivi) - synthetic characters Discussions

Write discussion on Importance value index (ivi) - synthetic characters
Your posts are moderated
Related Questions
Describe the mechanisms and genetic regulations that underpin how two cells such as cardiomyocyte and a motor neuron have identical gnomes, yet are functionally and structurally di

What are the chemical substances formed by water photolysis? What is the destination of each of those substances? Free electrons, hydrogen ions and molecular oxygen are liberat

Density Independent Factors Density independent factors are the extrinsic factors which tend to regulate the density of a population in ways that are not correlated with its

You are setting up a PCR reaction. a) The total volume of your reaction is 50 uL. Your stock primer solutions are 25 mM each. You want a final concentration of primer of 1 mM in yo

Explain Particle Movement ? Particle Movement :  Particles are moved down a concentration gradient by the process of diffusion. Osmosis is simply the diffusion of water acr

Rehabilitation Phase for nutritional treatment - Neuro Trauma? Once the patient stabilizes and starts recovering, be sides nutritional replacement, there is a need to assess fu

Borna disease Borna disease is fatal neurological disease of horses and sheep caused by a virus (RNA) of the family Bornaviridae and the disease is characterized by sub acute meni

Explain Protein hydrolysates It is valued for their superior nutritional qualities, including increased bioavailability and reduced antigenecity. Several enzymatic modification

Most proteins made by ribosomes on the RER (rough endoplasmic reticulum) are glycoproteins, which is they hold short chains of carbohydrates (oligosaccharides) covalently related t

what is the process called free radicals damage body molecules