Species Diversity of Herbaceous Seed Plants in Wetlands along the Middle Reaches of Wei River

In order to provide scientific data for vegetation landscape restoration and biodiversity conservation in the middle reaches of Wei River,this paper focused on analyzing the biodiversity of herbaceous seed plants in wetlands by using the community ecology research method.The results showed:1)a total of 168 species,belonging to 43 families and 119 genera,were found in the studied area.And among them,the Compositae,Gramineae,Cyperaceae and Polygonaceae were dominant families.2)The dominant species and associated species were different among the sampling plots,mostly Gramineae and Compositae.3)The values of Simpson index(DS)of the herbs were between 0.85 to 0.96.Those of Shannon Weiner index(H)were 1.62 to 2.32.And those of evenness index(JP)were 0.16 to 0.85.The data indicated that the diversity indices were low.Alpha diversity had a similar trend compared with species.4)Theβdiversity showed a similar pattern with Cody index,which were mainly decided by the habitat condition variation and human factors.