Analysis Of Seed Plant Resources And Diversity In Nianzishan Yalu River National Wetland Par

The wetland type of Nianzishan Yalu River National Wetland Park was relatively rare in the northern wetlands.Conducting wetland park seed plant surveys was of great importance to wetland conservation.It had remarkable uniqueness.The purpose of this paper was to investigate the seed plant resources of Nianzishan Yalu River National Wetland Park,and to provide basic data for biodiversity conservation and rational use of wetland natural resources in this wetland park.The sample line method and sample method were used to investigate and analyze the species composition,life types,vegetation types,geographic composition,and resource characteristics of seed plants in this wetland park,and the results of the study were as follows:(1)A total of 55 families,178 genera and 296 species of seed plants(including 4subspecies and 9 varieties)was distributed in Nianzishan Yalu River National Wetland Park,including 1 family,2 genera and 2 species of gymnosperms(including 1 variety),41 families,128 genera and 200 species of dicotyledons(including 2 subspecies and 6varieties),and 13 families,48 genera and 94 species of monocotyledons(including 2subspecies and 2 varieties).(2)Among the seed plants in Nianzishan Yalu River National Wetland Park,the family level was dominated by monocotyledonous and oligocotyledonous families,with the dominant families being Poaceae(containing 29 genera and 45 species),Asteraceae(containing 18 genera and 36 species)and Cyperaceae(containing 6 genera and 24species);the genus level was dominated by monocotyledonous and oligocotyledonous genera,with the dominant genera being Carex(containing 15 species)and Polygonum(containing 11 species).(3)Perennial herbs were the main life forms of seed plants in Nianzishan Yalu River National Wetland Park,with 145 species,accounting for 48.99% of the total number of species.The remaining living types was annual or biennial herbs(including78 species),aquatic herbs(including 30 species),herbaceous vines(including 24species),trees(including 10 species),and shrubs(including 9 species).(4)The seed plant vegetation types of the Nianzishan Yalu River National Wetland Park could be divided into 5 vegetation types and 14 species groups.The Form.Ulmus pumila in the deciduous broad-leaved forest and the Form.Salix in the deciduous broad-leaved scrub were more dominant.The rest were the Form.Polygonum Lapathifolium,the Form.Chloris virgata,the Form.Leymus chinensis,the Form.Calamagrostis epigeios,the Form.Digitaria ciliaris var.chrysoblephara,the Form.Polygonum sagittatum in the marshy meadow;the Form.Phragmites australis,the Form.Typha and the Form.Echinochloa crus-galli in the herbaceous marsh;the Form.Lemna minor,the Form.Trapa natans and the Form.Potamogeton in the aquatic vegetation.Among them,the Simpson dominance index,Shannon-Wiener diversity index and Pielou evenness index of the Form.Ulmus pumila and the Form.Salix were the highest with 0.719,1.590,0.765 and 0.728,1.387,0.862,respectively.(5)The temperate distribution component was the main geographical component of the genus in Nianzishan Yalu River National Wetland Park,with 102 genera.The world distribution had 50 genera and the tropical distribution had 26 genera.The geographical composition of species was also dominated by the temperate distribution component,with 209 species;the sub-boreal-boreal distribution component reaches 41 species;the world distribution component reaches 27 species;and the tropical distribution component reaches 19 species.The geographical composition of both genera and species was absolutely dominated by temperate components.Nianzishan Yalu River National Wetland Park had the closest relationship and high similarity with Ashi River National Wetland Park,Hadong Yanjiang Wetland Nature Reserve and Zalong Wetland.(6)The Nianzishan Yalu River National Wetland Park contained three species of vulnerable plants(Pinus sylvestris var.mongolica,Chosenia arbutifolia,Astragalus mongholicus),one species of near-threatened plants(Potamogeton natans),one species of national second-class key protected wild plants(Glycine soja),and three species of provincially endangered wild plants in Heilongjiang Province(Pinus sylvestris var.mongolica,Chosenia arbutifolia,Glycine soja).After statistical analysis,there were 163 kinds of medicinal plants,126 kinds of forage plants,62 kinds of nectar plants,57 kinds of edible plants,42 kinds of fiber plants,42 kinds of oil plants,41 kinds of ornamental plants,24 kinds of tanning plants,21 kinds of aromatic plants,13 kinds of starch plants,and 11 kinds of timber plants.