Proportion of species first reported on each foray

The fraction of species new to each foray is shown. In the second foray more than 40% of the species were new records. This is partially due to a strong seasonal effect. The genus Boletus for example is much more diverse in the December forays than the January forays, and Hygrocybe was just the reverse.  On the last two forays the percentage of new records dropped to 31% and 18%, respectively.  This may show that we are starting to saturate the species that we are currently able to identify, but it also may be caused by drier weather in the second season.