I am writing a report for university looking at bird communities in 3 different habitat settings. The data looks at the whether both bird abundance and bird diversity differs between habitats. I have data from 2019 and 2020 taken from the same locations, looking at the same species of birds and was hoping to get clarification on whether the data can be combined or whether it would need individual analysis using R and then a written comparison.
I only ask on here as I am trying to excel my writing capabilities in preparation of writing my dissertation.