Investigation And Evaluation On Rareand Endangered Plants In Gongga Mountain SNNR

Gongga Mountain National Nature Reserve(hereinafter referred to as Gongga Mountain Reserve)is located in the southwest direction of sichuan basin.It is the second stage of transition to the third step,which has a huge gap and complex natural conditions.The wildlife resources and plant resources in the area are abundant,which has extremely high protection,scientific research and utilization value.In this study,we systematically investigated the plant resources in Gongga Mountain Reserve by combining with the measure method and quadrat method,and analyzed the quantity,distribution scope,habitat status,community and conservation status.and put forward the countermeasures for protecting in order to provide basic information for the protection work of the protected areas,in order to reserve the protection work of basic data.The results are as follows:(1)There are 17 species of protected plants in the gonggaoshan reserve,13 families and 15 genera.There are four kinds of national level to protect plants,such as Isoetes hypsophila,Taxus yunnanensis,Kingdonia uniflora,Cypripedium fargesii;eight kinds of national secondary protection of wild plants,such as Larix mastersiana,Picea brachytyla,Picea brachytyla var.complanata,Magnolia wilsonii,Cinnamomum longepaniculatum,Tetracentron sinense,Cercidiphyllum japonicu,Emmenopterys henryi;included in the China Plant Red Data Book is Circaeaster agrestis;in the Red List is;Sinopodophyllum hexandrum;The other three types are sichuan province's important protection plant.(2)The large number of distribution is Circaeaster agrestis,Picea brachytyla,Larix mastersiana,Cercidiphyllum japonicu,Isoetes hypsophila,Acer pentaphyllum,which accounts for 35.29% of the total number of species;There are five resources that have the least amount of resources,Picea brachytyla var.complanata,Cypripedium fargesii,Emmenopterys henryi,Tetracentron sinense,Cinnamomum longepaniculatum,accounting for 29.41%.(3)Species horizontal distribution: Picea brachytyla,Taxus yunnanensis,Magnolia wilsonii,Circaeaster agrestis,Magnolia dawsoniana has distribution in 3 counties,the rest of the species distribution in only one county.Vertical distribution of species: thealtitude of 2800 m or more have Isoetes hypsophila,Larix mastersiana,Circaeaster agrestis,Kingdonia uniflora,Sinopodophyllum hexandrum;There are only 1 species of Emmenopterys henryi at an elevation of less than 2000 m.The rest is mainly distributed between 2000 ~ 3000 m.(4)The type of community in Larix mastersiana,Picea brachytyla,Picea brachytyla var.complanata is coniferous forest;the community type of Tetracentron sinense,Cercidiphyllum japonicu,Circaeaster agrestis,Heteropolygonatum pendulum,Cinnamomum longepaniculatum,Emmenopterys henryi is broad-leaved forest;Magnolia wilsonii,Sinopodophyllum hexandrum are distributed in coniferous forest and broad-leaved forest.The distribution community of Cypripedium fargesii is mainly bush and meadow.The type of Isoetes hypsophila is the community of lakes.(5)According to the present situation of the key protection of plant resources in the Gongga Mountain Reserve,the paper proposes to establish a key protection plant experiment nursery,to establish a natural protection community in the outer area of the protected area,and to adjust the protection weight,off-site protection and protection measures and other protective measures.