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Math Help - Different sampling size

  1. #1
    Newbie macedo's Avatar
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    Jun 2012
    From
    Porto, Portugal
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    Different sampling size

    Hello everyone

    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
    Sincerely
    Josť A Macedo
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  2. #2
    Newbie macedo's Avatar
    Joined
    Jun 2012
    From
    Porto, Portugal
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    Re: Different sampling size

    I have calculated different ecological indices which gave me naturally 30 different values (for each index).
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