Please can somebody help me?

#1
I am currently working on my dissertation,
but I need some help in figuring out which statistical test is best to use.

I have been looking into wildflower biodiversity found in churchyards.
I surveyed 18 churches over the summer.

I have been given species data on haymeadows from the wildlife trust, 15 sites in total -which I plan to use as control data

Unfortunately the data they have given me is just presence/absence data.
But the field method I used was quadrant sampling, so I have abundance data.

Here lies my problem, and would anyone be able to help me in how to progress with statistical testing?
 

noetsi

Fortran must die
#3
You need to define which method you are using and what presence/absence data is (or for that matter abundance data).