Dear All,
I would like to compare if the diversity of dragonflies in a series of urban ponds characterized by having well developed aquatic vegetation is greater than a different set of ponds without this vegetation. Each group is made up of pools of different sizes.
Each pond will be sampled twice during the flight period of the dragonflies.
I had thought of using some index of diversity, such as Shanon-Weawer, calculate the mean of one group and another and then evaluate whether the difference is significant or not, but I do not know if it would be a correct method.
Could any of you guide me on this?
Thank you very much for your attention,
Ricardo Martín
Your method is good and it's fine to compare those indices. The samples are not replicates though, they are just consecutive subsamples. The replicates are actually the pond types, but only if they are sufficiently distant from each other. Otherwise they are pseudo-replicates. But you can still obtain interesting information if you have pseudo-replicates, but it will only apply locally :)
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