1. ## Margalef Species Richness...

Margalef's richness index: (S-1)/ln(n), where S is the number of taxa, and n is the number of individuals.
Hi all, this may seem pretty simple to you all, but I admit that when it comes to numbers I struggle.
Please correct me where I (may) be getting this wrong:

My struggling point is, what is 'ln' I can't seem to find this anywhere (is it simply 1-n?).

2. Originally Posted by nurglespuss
Margalef's richness index: (S-1)/ln(n), where S is the number of taxa, and n is the number of individuals.
Hi all, this may seem pretty simple to you all, but I admit that when it comes to numbers I struggle.
Please correct me where I (may) be getting this wrong:

My struggling point is, what is 'ln' I can't seem to find this anywhere (is it simply 1-n?).
Hi,
the formula is $\displaystyle \frac{S-1}{\ln n}=\frac{S-1}{\ln(n)}$. The "$\displaystyle \ln$" is a function called the natural logarithm. You can find this function on scientific calculators (usually, it is on the same key as $\displaystyle \exp$).

3. Ahhhh my brain finally works, its not 1n its ln (log).
Cheers :>

Originally Posted by nurglespuss
Margalef's richness index: (S-1)/ln(n), where S is the number of taxa, and n is the number of individuals.
Hi all, this may seem pretty simple to you all, but I admit that when it comes to numbers I struggle.
Please correct me where I (may) be getting this wrong:

My struggling point is, what is 'ln' I can't seem to find this anywhere (is it simply 1-n?).

4. ## Assignment woes

hi all,

I was hoping you could tell me the which button I should be pushing on my calculator for the Margalef species richness index.

I have both the Log and In buttons on my calcualtor

is it correct if I type in S-1/Log(n
or is it S-1/In(n

hi all,

I was hoping you could tell me the which button I should be pushing on my calculator for the Margalef species richness index.

I have both the Log and In buttons on my calcualtor

is it correct if I type in S-1/Log(n
or is it S-1/In(n

ln, that is, the log to base e button.

Note to members: This thread has contextual relevance to the Advanced Probability and Statistics subforum, even though there is no explicit stats question being asked. eg. see WCS Malaysia Program - Study design and data analysis for more information on this index.

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# margalef richness index meaning

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