Species rank abundance plots

[VOGON]

I am a Msc/Phd Student and require information on a/any software that can 
test distribution plots i.e lognormal: but the tests must be suited for 
ranked data. The software should be able to test for broken_stick, and other 
related biological models.
I would be greatfull if anybody could tell me if such software exists, and 
if so where it can be found.



Thankyou

Mark Vogt
Mark at agric.up.ac.za