Effects Of Habitat Types And Waterlogging Conditions On Plant Diversity In Nansi Lakeshore Wetland

In this study,the effects of different habitat conditions and water situation on the diversity of herbaceous plants in wetland were investigated.A total of 53 families,128 genera and 177 species of herbs were found in this study,including 177 genera and 3 genera,including 3 families,3 genera and 3 species of the ferns,50 families,128 genera and 174 species of the angiosperms.The angiosperms includes 14 families,40 genera and 59 species of monocotyledons,36 families,85 genera and 115 species of dicotyledons.The families which includes more than 10 families is Gramineae and Compositae,totally includes 42 genera(32.06%)and 58 species(32.77%).The areal type of herbaceous plants in Nansi Lake wetland is more concentrated mainly Cosmopolitan and Pantropic.The areal types of the genera is concentrated on Cosmopolitan and Pantropic.The areal type of the species is different from that of the families and genera,the main type is Temp.Asia,China-Japan and China unique.The survey also found national secondary protected plants includes Glycine soja,endangered plant includes Glycyrrhiza uralensis and Vitex rotundifolia.Invasion species that includes Alternanthera sessilis and Symphyotrichum subulatum also occupy a large proportion.The species with the highest frequency are Phragmites australis,Alternanthera philoxeroides,Alternanthera sessilis and Nelumbo nucifera.The highest value of the forest habitat is Paspalum distichum,the highest value of the swamp habitat is Cynodon dactylon,the highest value of the wasteland habitat is the highest Ipomoea nil,the highest value of the habitat in the near water is Lemna minor,the highest importance of the beach habitat is Cynodon Dactylon.The highest value of the seasonal waterlogging area is Inula britannica,the highest value of the seasonal water area is Cynodon dactylon,the highest value of the permanent water area is Lemna minor,he the highest value of the intermittent water area is Setaria Viridis.The richness index of different habitat types is:swamp>tidal flats>water nearby area>forest land>wasteland.The species richness index under different water conditions is:seasonal water>intermittent water>permanent water>seasonal waterlogging.With the increase of species richness,the Shannon-Wiener index andthe Pielou evenness index all increased,while the Simpson index decreased accordingly.At the same level,the similarity between the tidal flats and the swamp is the highest,the Jaccard index is 0.426,the Sorenson index is 0.597,and the same species has 75 species.At the water situation level,permanent water and seasonal water has the highest similarity with Jaccard index 0.435,Sorenson index 0.607 and 43 same species.At the habitat level,tidal flats and swamp has the highest similarity with Jaccard index 0.426,Sorenson index 0.597 and 75 same species.