Diversity Study Of Mountain Bryophytes In Inner Mongolia Alashan Right Banner

For a long time,because of the traffic inconvenience,most of the desert steppes,deserts and mountains were not studied in the Western Inner Mongolia,especially the bryophytes research in West Alashan,Longshou Mountains and Ejina.And the book Flora of Bryophytes in Inner Mongolia have no record.At the same time,there are a few documents about bryophytes in the Western Inner Mongolia,so the research of bryopytes in this place is extremely urgent.Inner Mongolia Alashan Right Banner as the major research area,on the one hand,complete the bryophytes flora of Inner Mongolia and provide the datas for second publish of Flora of Bryophytes in Inner Mongolia,on the other hand,make foundations for research of arid area and semiarid area about bryophytes ecology and landscape ecology.Here we studied the mountain bryophytes in Inner Mongolia Alashan Right Banner and got the results: There are 16 families,41 genera,111 species in Inner Mongolia Alashan Right Banner(including variant).In Longshou Mountain,there are 15 families,36 genera,90species;in Yabulai Mountain,there are 4 families,14 genera,27 species;in Taohua Mountain,there are 9 families,22 genera,61 species.At the same time,we analysed the characters of dominant families and dominant genera.7 types of the bryoflora in this place are recongnized.North Temperate elements account for 56.76%,endemic elements of China account for 10.81%,East Asian elements account for 5.41%.It reflected that bryophytes of Alashan Right Banner is based on North Temperate elements and has the high Chinese characteristics,in addition the characteristics of East Asia are less.Compared Longshou Mountain with other 7 studied mountains,we got the results: the relationship of bryophyte flora between Longshou Mountain and Helan Mountain is closest;and the Daqing Mountain,the YanshanMountain,the Guancen Mountain is close;the eastern of Tianshan Mountain and Qilian Mountain is far away;the Xitianmu Mountain is farthest.The frequentness of bryophytes in six habitats were investigated.It was ranged from high to low as following: rock seam> soil growth> rock surface>spruce forest> base of the tree> epiphytic tree.The study on dominant species of 6 habitats show that different habitats have the different dominant species,however,some dominant species are presented to several different habitats,because those dominant species have a wide ecological range,it also show that the bryophytes habitat of Alashan Right Banner is simple.The Shannon-Winener value of 6 habitats as following: rock seam is 2.38,soil growth is 2.20,rock surface is 1.78,spruce forest is 0.66,base of the tree is0.18,epiphytic tree is 0.11,we found the rock seam has a high species diversity.The Pielou value range from high to low as following: rock seam is0.6> soil growth is 0.5> rock surface is 0.44> spruce forest is 0.19> base of the tree is 0.16> epiphytic tree is 0.07,from this data we found the Pielou value of 6 habitats have a big difference.The landscape zone distribution of bryophytes was studied in Longshou Mountain preliminarily,it can be divided into 7 landscape ecological zones.The dominant species of mountain desert are Grimmia,Didymodon and Tortula atrovirens;the dominant species of mountain steppe are Grimmia,Didymodon and Tortula atrovirens;the dominant species of mountain dry steppe are Didymodon and Gymnostomum;the dominant species of mountain irrigation are Hypnum,Grimmia and Didymodon;the dominant species of picea crassifolia forest are Abietinella abietina,Hypnum and Distichium capillaceum;the dominant species of alpine cold steppe are Didymodon,Grimmia and Crossidium;the dominant species of alpine meadow are Didymodon,Bryum and Hypnum.There are 5 endangered bryophyte species in Inner Mongolia Alashan Right Banner: 4 species are vulnerable,1specie is endangered.