Hi everybody,
I try to use the EstimateS software in order to calculate ACE and Chao1 estimators of species richness. I'm trying to compute them on a species abundance data set of 22 species of dung beetles collected in 30 pitfall baited traps.
I followed the guidelines of EstimateS. But when I run the analysis, the richness estimated is inferior to the observed richness... whatever the estimator considered.
Does anyone know what happen?
Thank you so much.
Will
PS: for those that want to try, please find my data file attached to this message.
I would just calculate by hand because the data file is small :)
Hi Will,
I use EstimateS all the time. Get rid of everything in your data set accept your first row with file name only (get rid of *SampleSet* 1 1 1...you don't need this for you simple data set), your second row with number of species and samples (currently correct as is), and then the raw data, i.e. get rid of all column and row labels. I just ran your data set. Actually, given your ratio of singletons to doubletons, it looks like your sampling is complete, i.e. you've collected all the species and the estimators won't give a higher number than the observed number. The accumulation curve should be flat if you plot.
Best
Hi Janice,
Thanks a lot for your help ! I will try again.
Best regards
- Badges
- Science topic
- Similar topics
- Geoscience
- Asia
- India