Thank you so much for information But I have question What if species are so many like above 1000 we can't count like Eichhornia (water hyacinth) so my question is how to find biodiversity in that case Please help me thank you
Hi, we need to sample the population (Eg. quadrat sampling for plants, capture-release-recapture for animals etc). You can only use these methods to estimate what are the species present in a habitat and what is the size of the population, since counting all of them is simply not possible.
Hi, do you mean the Simpson index Vs Simpson index of diversity? If yes: The one in my video is the Simpson index of diversity. (A level syllabus uses this). It has a "1 -" in front. So the larger the value, the greater the diversity. Simpson index is the same formula but without "1-" in front. It measures the probability of two organisms in an ecosystem belonging to the same species. So the smaller the value, the more diverse it is. You can refer to this article: www.countrysideinfo.co.uk/simpsons.htm#:~:text=A%20value%20of%20Simpson's%20Index,in%20the%20value%20of%20D.
Thank you so much for this wonderful vedio. But I saw there are two formula for calculating Simpson's Index of Diversity . 1. described here and 2. 𝐷 = 1 - Ʃ 𝑛(𝑛-1) / 𝑁(𝑁-1) . I don't understand why these two formula exist and which one I need to use to calculate diversity . Can you please explain?
Hi, these are the two variations of the formula. I can't fully explain the mathematical background for it because I am pretty bad in maths haha.. but the -1 has to do with the degree of freedom. Either one of the formulae can be used, but be sure to check the syllabus you are studying. Mine is according to the Cambridge International A Level syllabus, and they choose the one without taking into account the degree of freedom, hence there is no -1. I am not sure which syllabus you are following, but the subject outline should tell you which formula you should use.
This video needs more views. Great explanation : short, simple and sweet :)
Thank you :)))
This channel deserves more views- great,short and efficient explanation (also the musics cool)
Thanks for the kind words, much appreciated!
Short, crisp and so easy to understand. Love your videos please make more!
Thanks for the nice words !
@@dsrmanav5560 yeah, I took my exams in the Feb/March series.
Thank you so much. What a refresher.😀😀
You are welcome ;)
Many prayers to youu thankyouuuu sm
You are welcome !
what a legend, thank you!!
you are welcome !
5 years and still saving lives.
Glad that I can help 😊
Thank you for clearing my concepts thanks again
You are welcome! :)
Thank you so much for information
But I have question
What if species are so many like above 1000 we can't count like Eichhornia (water hyacinth) so my question is how to find biodiversity in that case
Please help me thank you
Hi, we need to sample the population (Eg. quadrat sampling for plants, capture-release-recapture for animals etc). You can only use these methods to estimate what are the species present in a habitat and what is the size of the population, since counting all of them is simply not possible.
@@DBiologyClassroom ok
Thank you sir 👍🏻😊
@@fatimarifai19 You are welcome
Good one 👍🏻
Thank you :)
yes as always beautifully explained
Thank u !!!
Hi can please tell me what's the difference between SID and SDI. What are the formulae used for each.
Hi, do you mean the Simpson index Vs Simpson index of diversity?
If yes:
The one in my video is the Simpson index of diversity. (A level syllabus uses this). It has a "1 -" in front. So the larger the value, the greater the diversity.
Simpson index is the same formula but without "1-" in front. It measures the probability of two organisms in an ecosystem belonging to the same species. So the smaller the value, the more diverse it is.
You can refer to this article:
www.countrysideinfo.co.uk/simpsons.htm#:~:text=A%20value%20of%20Simpson's%20Index,in%20the%20value%20of%20D.
@@DBiologyClassroom Thanks so much for clarifying.Much appreciated 😊
thanks for the good clear explanation!
You are welcome!
God bless you
and to you too !
Thank you!
You're welcome !
Very helpful. Thank you very much
You are welcome !
Great video! Thank you sir!!
Thank u!
Amazing :)
Thank you :)
so nice thanks and make more
You are welcome !
Eres mi padre Aikazo
Thank you so much for this wonderful vedio. But I saw there are two formula for calculating Simpson's Index of Diversity . 1. described here and 2. 𝐷 = 1 - Ʃ 𝑛(𝑛-1) / 𝑁(𝑁-1) . I don't understand why these two formula exist and which one I need to use to calculate diversity . Can you please explain?
Hi, these are the two variations of the formula. I can't fully explain the mathematical background for it because I am pretty bad in maths haha.. but the -1 has to do with the degree of freedom.
Either one of the formulae can be used, but be sure to check the syllabus you are studying. Mine is according to the Cambridge International A Level syllabus, and they choose the one without taking into account the degree of freedom, hence there is no -1. I am not sure which syllabus you are following, but the subject outline should tell you which formula you should use.
@@DBiologyClassroom Thank you so much for your effort and your response. I'm bad in maths too lol. keep up this good work , you are doing great.
@@soumilibera8282 I will, thanks for supporting !!
Wow...
What is its SI unit?
Hi, there is no SI unit. It's an index value.
I seee.
:)
HARAMZADA good video thnks
ratio
thank you!
Welcome! 😊