2021_2022_E4_EBIRD_23spp_SEASONAL_BirdDistribution_WMV_hosts

 

a) e4ebirdwnvhostsweeklyabundance all weekly abundance datasets at 3km resolution. 

b) e4ebirdwnvhostweeklyPA abundance with missing recoded to 0.  This is based of ad hoc checks of weekly datasets against the birdlife  species ranges,  which suggest that the maximum extents of combined weekly abundance distributions match the rage boundares fairly well

c) e4ebirdspprichnessallSUMMEANweekly summed and mean weekly presence absence for all species.  If a species in missing a weekly dataset it is removed from the Mean value calculations for that week.  To maintaing a constant maximum presenxe number in the summed number of present species,  missing weeks are filled with last valid presence week  up to halfway through the gap in availability, then with the first avaiklable distribution after the gap

d) calcsumabundallweeks weekly sum of abundance of 23 spp.  As there qare some gaps for various species this is an interim product.. When divided by the nunber of species summed (see below) it provides an index of collective abundnace of the 23 host spp

e) meanallabundallweeks weekly summed abundnace divided by number species summed (acounts for gaps indata) .  Only NOData if no species recorded