Calculate Simpson's Index

[@judizollweg1385]

This was the BEST explanation of Simpson's I have found. I teach Environmental Science elective to high schoolers and Biodiversity is a chapter I cover. I have been working on this awhile and never understood it until now. THANK YOU!!!!!

[@tsereve6446]

The real question is why you are a teacher when you could totally be a Calvin Klien model, or even l'oreal. great video man very informative!

[@shalannii]

i would not be able to focus if he was my teacher lol

[@menzizacks6345]

Simpson's index, break made simple, I have been stressed out on how to approach this thing, thanks for breaking it down you have made my day

[@tristengleason9605]

Thank you! I’ve come back to this video many times for my biology classes.

[@savannahrose8631]

Thank you, helping me study for my Ecology exam! I needed more detail on getting from point A to point B and you've helped!

[@Basilogonzalis]

Thanks Bro!! That was an amazing video with really proper illustrations.

[@PeterStanley]

No worries, I'm glad it helped.

[@Ali-ks5kz]

thanks for useful information but I have a question how can we calculate the whole diversity of all these three indexes?

[@annagergely9551]

Thank you so much! I have my ap bio exam tomorrow and this helped so much. The video was clear and easy to understand

[@PeterStanley]

Glad to hear it helped and hope you did well on that bio exam.

[@warcraftdevil4593]

Thanks really needed this. I couldn’t understand my teacher when she explains it

[@pauloliver3721]

Thank you, you are about to help me nail my 2nd year Palaeontology exam!!!! sooo helpful and easy to follow

[@PeterStanley]

Hope you crushed it!

[@pauloliver3721]

Peter Stanley it didnt come up and not much else did in regards to my revision but did ok anyway I'm sure thanks dude

[@PeterStanley]

At least now you're prepared for the random day when a bit of statistics jumps back into your life ;)

[@cuteegirl114]

What is difference between shannon diversity and simpson diversity index? Why we calculate both when we have to measure diversity.. Plz answer

[@genanewagitew6287]

I found it important for my study. Thank you so much! I will also be extremely happy if I could the original article of the Simpson.

[@capucinerambaud521]

I have a question, if I want to know the global diversity of my total area, do i I average my Simpson indices from every quadrats ? ex: if i find D=0.62 for my first quadrats and D=0.41 for my second, i can just do the average to know my simpsons indice ?

[@thewayoftea]

What if you have a relatively large number of species where you only have one individual in the sample? You end up cancelling these species by subtracting 1 because the value is zero. Please explain. Thanks!

[@anthonyburgers1317]

Why is the -1 in the equation a fail safe?

[@yushanbai2800]

Thank you so much! What's the tool you used to make the slides? The emoji getting dropped on the screen was great!

[@PeterStanley]

Glad you like it. I use Keynote (slideshow application from Apple).

[@rishabkumarmodi5959]

Please make a video on how to count animal species withing a sampling area.. And on what basics can i select sampling area..

[@aashutoshjaiswal2290]

Sir ji..salute ♥️

[@isaacperez1337]

Great video! Thanks for that easy explanation. Can you explain Biological value index (sanders,1960), please that would be great

[@picksbypat]

Thanks, excellent example, and helped me understand this formula. Will find it very useful in my book.

[@andreawaters7089]

Thank you! Been struggling as I've been shown a different formula and I'm a mature student so, sort of on my own.

[@KeenKoala115]

Andrea Waters Your only on your own if you think you are. Keep at it 💪

[@anjipoplindermann5484]

Thank you soooo much; you've explained this incredibly well. I find all aspects of scientific maths difficult...….but you made this look easy THANKS :D

[@jye-linhsu1105]

Really great. Thank you so much. It's so useful.

[@thomasbryrup6526]

Awesome video! It really helped me a lot. Wish you would do other measures of alpha diversity as well :) All the best.

[@PeterStanley]

Cheers, I'll give some more tutorials a try and share soon.

[@garethedwardking5860]

I wouldn't take on such a huge range of taxa; no higher than family level rather than including so many quite unrelated Classes and Orders. What kind of conclusion can be reached even if comparing two very similar habitats?

[@PeterStanley]

In my ecology units (in biology and environmental science) questions tends to be 'how does human impact (noise, trash, traffic, water pollution, etc) affect the diversity of 'x' as you move down a line transect'. We've used pitfalls, tree shakes, etc and our results in Udzungwa and Jozani national parks in Tanzania and have found some interesting correlations. Granted this is for a one-week study so we rarely conclude on the cause if there is a change in diversity along a transect. Feedback is always welcome and I hope you can share your specific suggestions that my students could pursue. Feel free to get in touch.

[@garethedwardking5860]

@@PeterStanley Thanks Peter. It's probably because I'm an old school taxonomist and the students either mess up in terms of classification per se anyway or I'm always emphasising their necessity of being highly observant as trainee biologists. I've never looked at more than one taxon in a transect for example, so would get the students to concentrate on learning to differentiate different species of low plants along a line transect and then look at their relative abundance in relation to each other. Perhaps the detail is that which I wouldn't want them to lose. I can't imagine doing field work in an East African park; here I am temporarily in Poland and insect diversity at the end of April is poor. Birds are the feature taxon.

[@nisanahmed2262]

Thanks bro..It was really very useful

[@TGuyHD]

That was very helpful big thanks from Morocco

[@PeterStanley]

Shukran. Good to know it's helpful.

[@gracemercy2058]

That was very helpful.Thanks Peter

[@uaehoverfly]

Thank you so much, this was very clear and easy.

[@Amitvlogs4u]

nice bro thaks a lot it was very difficult for me to understand thanks bro

[@capucinerambaud521]

thanks for your videos, they are really hepfull

[@DGB149]

Excellent explanation! Well done

[@PeterStanley]

Thank you.

[@deepsoldierx2633]

Thank you very clear and straight forward.

[@biplabghosh1552]

Awesome sir, thanks

[@sonamtshering6787]

Thank you so much. I found it useful

[@vagishdev]

Thank you Sir, it was really helpful

[@dominickamune6718]

Thanks...im now understanding

[@gugulethulorrainesibanda7766]

Crystal clear thank you

[@captainmelon1447]

This was really helpful!! Thank so you much!

[@PeterStanley]

Glad it was helpful!

[@drchioma1962]

Thanks so much. It really helped.

[@drchioma1962]

Do you have any reference for the formula applied please, I am writing up a manuscript?

[@PeterStanley]

Here is a good summary: www.countrysideinfo.co.uk/simpsons.htm

[@jaydave2500]

What if n=1 and N=1 ...the formula doesn''t work.

[@PeterStanley]

Good point. The idea of having 1 of any species in this formula would result in '0'... suggesting that it shouldn't really be counted because it's a probably an anomaly or random error in your data collecting. It's a pretty clever actually.

[@thewayoftea]

@@PeterStanley I have benthic invertebrate data with a number of species present as a single individual per sample in each site, but they are not being counted, which doesn't seem accurate to me.

[@rizkynazarreta2077]

thank you so much :) its very helpfull and I get the high diversity in my result data.. yeeayyyy

[@2000luisfelipe]

Really great video!

[@PeterStanley]

Thank you

[@zoraizzia958]

The real MVP

[@isadorabordini9528]

Great video! Thank you!

[@alexandermishvelia4136]

So helpfull !! - Thank you!

[@PeterStanley]

Great to hear this helped.

[@ciciliyakiran9832]

Thank you.

[@shentaluigi4191]

this is help me a lot, thank you so much

[@PeterStanley]

Great to know it helped.

[@sakuraremell5377]

legend! thank you so much

[@shriyayerramsetty7046]

you look like your beekeeping age. Also THANKS I NEEDED THIS.

[@blumendaisy]

THE WAY MY JAW DROPPED BUT REALLL😭

[@eccentricone8886]

Anyone ever told you that you sound a lot like Joaquin Phoenix?

[@PeterStanley]

That's a first

[@emilyrose_tbdc]

Thank you this helped me a lot

[@mlawgetachew9922]

ya you are right sister

[@mariedankworth3795]

Super helpful :)

[@CaptPeanutBut]

Thank you!

[@missbubby007]

amazing!

[@reyna7100]

I still don't get it :(

[@PeterStanley]

+Queen Hi Queen, let me know what you are stuck with and maybe I can help.

[@reyna7100]

+Peter Stanley Okay um firstly in UK textbooks the equation is like D=1-Σ(n/n)² so I'm confused how to change it. also everything between 3:40 to like 4:20, why must you decrease everything by 1? hope you can help, Thank you :)

[@PeterStanley]

Took me a while to see this comment but I hope you found the link in the description that shares more about the index. It's pretty useful for your question.

[@PullSluggman]

tx a lot, exam in 2 days

[@eclipseofodile6191]

theres a mistake, you cant have same probability for the different habitat

[@kipropanthony1956]

Thanks a lot.

[@BiologyTerms]

Bigger the value lower the biodiversity......

[@PeterStanley]

Just checking that you did the last bit... D = 1-..... I've forgotten this step many times and then my results are backwards.

[@MagikCode]

I clicked away when you chose the upper right equation

[@PeterStanley]

The IB doesn't mind you using the upper right version but sorry to hear you didn't give it a go. It really is much easier to make sense of than the other version.

[@Fereshteh_all_day]

thank you very much