I have a dataset that consists of 120 survey points, each of which was surveyed 4 times in a year (so 480 total surveys). We counted the presence or absence of species in every 3-minute interval of a 15 minute survey. I am interested in determining how many more species are observed for each additional 3-minute interval (aka the species accumulation).

I have a dataset that consists of 120 survey points, each of which was surveyed 4 times in a year (so 480 total surveys). We counted the presence or absence of species in every 3-minute interval of a 15 minute survey. I am interested in determining how many more species are observed for each additional 3-minute interval (aka the species accumulation).

I have a dataset that consists of 120 survey points, each of which was surveyed 4 times in a year (so 480 total surveys). We counted the presence or absence of species in every 3-minute interval of a 15 minute survey. I am interested in determining how many more species are observed for each additional 3-minute interval (aka the species accumulation).

I am trying to do a DCA in R with vegan package and decorana() function for a vegetation dataset. the Dataset consists of plots in rows, with abundance of dif. plant species in colums. When running