Hi David, You might also look into PC-ORD software for multivariate analysis. It works very well with many types of compositional data and can handle any number of species. It includes multiple tests including MRPP, PermaANOVA (multivariate ANOVA), and NMS. This program was developed by Bruce McCune specifically for species composition data, but can be applied to a wide variety of multivariate data sets.
Travis -----Original Message----- From: Ecological Society of America: grants, jobs, news [mailto:[EMAIL PROTECTED] On Behalf Of Liane Cochran-Stafira Sent: Wednesday, October 04, 2006 9:08 AM To: [email protected] Subject: Re: comparing forest composition with old field saplings Hi David, You might try Nick Gotelli's Ecosim software. It offers 1. Co-Occurrence 2. Macroecology 3. Niche Overlap 4. Size Overlap 5. Species Diversity 6. Standard Tests 7. Guild Structure Perhaps the Co-occurence program might help. I know it can handle a large number of species. Liane At 07:31 PM 10/2/2006, you wrote: >Hi >I have been analyzing old field seedling and sapling composition and >trying to compare it with adjacent mature forest. I have decided on >using % BA for the adjacent mature forest and % sapling abundance as measures. >I am stymied because I have not found a statistical test that will >handle composition data very well. (especially in situations with >relatively high numbers of species). > >any ideas? > >thanks > >David *************************** Liane Cochran-Stafira, Ph.D. Associate Professor Department of Biology Saint Xavier University 3700 West 103rd Street Chicago, Illinois 60655 phone: 773-298-3514 fax: 773-298-3536 email: [EMAIL PROTECTED] http://faculty.sxu.edu/~cochran/
