I am not sure what it is that you want to do, If you have lists of species from two (or more) adjacent areas, broadly with the same habitat, you can see how many species are in common, and how many are unique to one area, There are many indices of similarity and difference that may be used: which one will depend on the exact question you want to answer, and on the quality of the data.

One problem with all such studies, especially with "hard to find" species, is that your inventories for each area may not be complete. There are methods for checking this.

The standard book dealing with these problems is:

Magurran, A.E. & McGill, B.J. (eds). 2011. Biological Diversity: frontiers in measurement and assessment. OUP, Oxford

Dear Shakti

If you are planning to explore plant species, you can follow quadrat/transect methods depending on the situation of the study area. Once you have your data, you check the literature which one is new in your area/country. 

Regards

Dear Professor (Ashfaque Ahmed)

        Thank you very much professor for your reply and suggestion. I hope it would helpful to me. I hope you are doing well and good, and I wish you the same.

Your sincerely

sakthivel

I am not sure what it is that you want to do, If you have lists of species from two (or more) adjacent areas, broadly with the same habitat, you can see how many species are in common, and how many are unique to one area, There are many indices of similarity and difference that may be used: which one will depend on the exact question you want to answer, and on the quality of the data.

One problem with all such studies, especially with "hard to find" species, is that your inventories for each area may not be complete. There are methods for checking this.

The standard book dealing with these problems is:

Magurran, A.E. & McGill, B.J. (eds). 2011. Biological Diversity: frontiers in measurement and assessment. OUP, Oxford

Hi Sakthi,

you should know that total amount of species isn't possible to identify for the ecosystem. Even type of distribution is changing due to your scale! So, all depends on what you want to do. If this is large mammals, so no problem as species lists are enough common in good access References, if protists - complete catastroph due to several reasons. But increasing in species list with enlargening of the territory of investigation will be parabolic with abrupt steps, when changing of sub-community clusters amount. If, eg, you are investigating  isolated island, so, one sub-community will be the tropical forest, other some lagoon, other freshwater basins, sandy beach, volcano etc. So, this abrupt jump will appear when you include next sub-system. exist the concept (macArthur et al) that some habitats or conservating Areas can be qualified as ISLANDS, so growing area of investigation can have the same approach as above...

Reference on the question is giant. I'm attaching some no open access books may be useful to you!

Andrey

To estimate how complete is your list of taxa comparing to total number of existing taxa in investigated area you can use  species accumulation curve. You can easily count it with free PAST software or with PRIMER 5 or PRIMER 6 software.

Would recommend to try to ellaborate a cummulative curve of number of species by repeating qualitative samples both in the place and along time in the same place (seasons and years), to finally get an asympthotic trend. Maybe you wont get the real number of species in the site, but get a close representation of the total number of existing species, and even to get a prediction of the total number of species by extrapolation of the curve using the appropriate mathematical procedure.

 Dear Professor/s, Senior Researcher, Teacher and Doctoral student, 

            Thank you very much to all, especially Professor/s who spent their time to guide me in the right way for my research carrier. You gave me lot of information about in this area of research study for my research. Especially Professor/s and Senior researcher suggested me better way to explore my research on the right hand. Once again thank you all. I hope you are doing well and good & I wish you the same.

Yours sincerely,

sakthivel

Open access EstimateS software is what was used some 5 years ago.

Best wishes

Marcelo

Thank you Marcelo Kun for your suggestion. I will check out.

Please what do you mean here? Western Ghats or goats (animals)?

Thank you Professor for your clarification, I am sorry, its spelling mistake.

It is Western Ghats only. Unfortunately i didn't see that. Just now 8 years I am doing my studies in English before that it was completely in my mother tongue (Tamil).

Please don't mistake me. I am learning English.

Your sincerely

sakthivel

If you want to compare two  area with the same habitat,you can see how many species are common and how many species are unique to one area;for that you can applied the Simpson´s coefficient.

This coefficient is C  x 100 / n

where:C:number of common species

             n:total number of species

When the value of this coefficient is upper 50% the two area haven similitude faunistic,and when is low 50% the comapred area are not similar.                           

Dear Julio Pavel García Lahera,

Thanks for your valuable reply and it was useful.

Your sincerely

sakthivel