Analysis Of Ecological Distribution And Regional Environment Characteristics Of Ammopiptanthus Mongolicus

Ammopiptanthus mongolica,as a kind of relict plant in the ancient Mediterranean Tertiary,is the unique super xerophytic evergreen broad-leaved shrub in the desert region of central Asia.It has been listed as a national second-class rare and endangered plant.We consulted relevant flora and analysed altitude,sunshine hours,precipitation,air temperature,wind speed,soil and habitat in the distribution area of Ammopiptanthus mongolica and finally clarified the relationship between the geographical distribution of Ammopiptanthus mongolica and the regional environmental characteristics.The result provides scientific basis for the local environmental protection construction.The main results of this research are as follows:?1?The main area where Ammopiptanthus mongolicus grown is East Alashan and West Ordos,and some other area is the marginal area.the main ecological limit factors for distributing habitats are altiplano,annual precipitation,and sunshine hours.This result provides science basis for Ammopiptanthus mongolicus resources protection and paleontological research.?2?The principal component analysis of Ammopiptanthus mongolicus was conducted on the annual sunshine hours,annual average temperature,annual precipitation,wind speed and altitude in the distribution area of??Ammopiptanthus sinensis.The first principal component equation is F₁=0.0234X₁-0.5654X₂+0.4816X₃-0.3936X₄+0.541X₅,the second is F₂=0.9182X₁-0.1140X₂-0.3540X₃-0.1165X₄+0.0741X₅.Based on correlation analysis of the five ecological factors of density,plant height,crown width,cover degree,woody plant species and study area of Ammopiptanthus mongolicus,We consult that the correlation between altitude and vegetation density was significantly related,the average annual wind speed was significantly related to the plant height of Ammopiptanthus mongolicus,the annual average precipitation was significantly related to the radius of vegetation,the average annual wind speed was significantly related to the coverage of Ammopiptanthus mongolicus and the average annual wind speed and woody The plant population is significantly related.?3?Ammopiptanthus mongolicus as an ancient Mediterranean relict plant,its distribution path and habitat are different from other ancient relict relict plants.Ordos and east Alashan is a suitable distribution area.The biomass and the diversity of woody plants were the highest in the area.Among them,relying on the Yellow River as the center of its distribution area,which is connected by the Yellow River,the northern end of the Ulan Buh Desert and the southern end of the Tengger Desert are two central distribution areas.Helan Mountain plays a connecting role and connects the two central distribution areas.