Todd Johnson

4 Questions 16 Answers 0 Followers

Questions related from Todd Johnson

Is there anyone with identification keys for earthworms of southern or central Africa?

I am looking for taxonomic keys to identify some of southern Africa's earthworms to genus or species level. If there is anyone with information on how to access these keys or an easy way to...

04 August 2020 1,173 10 View

Can I generate species rarefaction curves based on two different trapping techniques?

I am using two types of traps to collect insects and would like to predict the species richness of different localities. Is it possible to generate rarefaction curves for both methods combined or...

15 March 2018 668 3 View

Can one correlate habitat variables with relative abundance. Is it acceptable to use proportions or mean numbers per trap?

Abundance can be expressed as total, mean or as a proportion or percentage. For correlating with habitat variables in the absence of temporal data, which do you think is most applicable...

05 February 2018 4,642 9 View

How do I get a free copy of Primer?

Is it possible to get a free copy of Primer. If not is there another statistical software which is good for analyzing diversity indices. Thank you.

11 December 2017 6,192 4 View