I would like that you may help me with this following question:
I have data from plant species occurrences from 30 sites in coastal dunes vegetation.
At each site I have made data collection along one transect (so all the 30 transects have different lengths and sometimes very different, the smaller with 8 m and the bigger with 130 m).
I have calculated different ecological indices which gave me naturally 30 different values.
Now, I grouped the 30 profiles in two groups (2 different environmental conditions: erosive beach and not erosive beach).
May I compare the two groups with all the data (with all the complete transects) or I have to previously to cut to a common length to all the 30 transects in order to compare statistically the data?
Thanks you for your attention
Josť A Macedo