摘要
In order to fully understand the distribution characteristics and geographical elements of fern flora and to reveal their process of natural history, the present study analyzed the floristic composition and geographical distribution of ferns in grassland of Gansu Province. The results showed that there were 31 species of ferns in grassland of Gansu, belonging to 19 genera and 14 families. The investigated ferns accounted for 22.22%, 8.26% and 1.99% of total families （63）, total genera （230） and total species （2 600） of ferns resources, respectively. The dominant families were Dryopteridceae and Polypodiaceae; the dominant genera were Selaginella and Woodsia. Families mainly belonged to tropical distribution type and genera mainly belonged to tropical and temperate distribution type without endemic genus. Vertical distribution was obvious ; plant components contained old families and genera. The richness of fern in Gansu grassland was not high.
In order to fully understand the distribution characteristics and geographical elements of fern flora and to reveal their process of natural history, the present study analyzed the floristic composition and geographical distribution of ferns in grassland of Gansu Province. The results showed that there were 31 species of ferns in grassland of Gansu, belonging to 19 genera and 14 families. The investigated ferns accounted for 22.22%, 8.26% and 1.99% of total families （63）, total genera （230） and total species （2 600） of ferns resources, respectively. The dominant families were Dryopteridceae and Polypodiaceae; the dominant genera were Selaginella and Woodsia. Families mainly belonged to tropical distribution type and genera mainly belonged to tropical and temperate distribution type without endemic genus. Vertical distribution was obvious ; plant components contained old families and genera. The richness of fern in Gansu grassland was not high.
基金
Supported by Plant Resources and Floristic Studies of Grassland in Gansu Province(034-036236)
Forage Genetic Resources Protection and Germplasm Resource Bank Construction in Guangxi Province(GKN 14123006-32)
China Agricultural Industry Research System"Innovation Team Construction for Beef Cattle and Mutton Sheep Industry in Guangxi Province"(nycytxgxcxtd-09-04)
