Life history of pteridophytes starts from a spore dispersal on the ground. It is considered that pteridophytes distribution is rather correlated with present climatic conditions than that of seed plant. A quantitative of abundance and frequency of pteridophytes is not surveyed well, however, habitat preference of pteridophytes has been well reported in the past experience. Land-use can be considered to be important factor affecting to plant distribution at local scale and human impact such as artificial reclamation is expected to lead loss of biodiversity.

Here we designed to quantify the correlation patterns between the land-use and species richness, species assembly. Pteridophytes flora has been surveyed at 226 sites in Aichi prefecture during 2007-2009. We measured species richness, diversity and reproductive types in the different land-use types: artificial reclamation (AR), plantation (PL), compensatory afforestation (CA) and Quercus serrate vegetation (QV). 171 pteridophyte species were recorded in total. We found that AR and CA under human impacts showed loss of diversity. AR and CA permit ferns to survive with apogamy under urban environments. On the other hand, PL and QV promote fern cycle with sexual reproduction.