highly significantp = 2.20 × 10 −16
The richness of species and genera were higher in the historic samples than in the recent samples, but proportions of endemic genera and species were lower in the historic samples ( table 2 ). Highly significant declines were documented both in the numbers of species ( p = 2.20 × 10 −16 ) and genera ( p = 1.13 × 10 −10 ) between the 1940s and the present ( table 1 ).