Study On Diversity Of Fungus Community Of Sand-Fixation Plants In Wulan Buh Desert

From 1998 to 2000, fungus diversity of sand-fixation plants in 5 plots at different habitats(descrt area, peripheral area of the artificial oasis and the interior of the artificial oasis)in Wulan Buh Desert were investigated and studied.Richness indexes~ evenness indexes and diversity indexes of fungus community of sand-fixation plants were calculated respectively by the means of Margalef index( R1).. Menhinick index(R2)~ Shannon index(H?~ Simpson index( X)~ Pieou index(Ei) ~ Sheldon index(E2) and Heop index(E3).The results showed that there were 133 fungus species in 5 plots, dominated by Fumago vagans Pers. Alternaria tenuis Nees. Cytospora spp. and Ascochyta spp..Changes in the index values of R1~. R2~ H A Eu. E2 and E3 indicated that the change trend of R1 .. R2 accorded basically with H and A , namedly Huhhot(~)>Botanica1 Garden in the Desert-Forest Experimental Centre of CAF(~)>l06 Sand-Control Zone(?> Wuhai Sand-Control Forest Farm(~ )>the First Experimental Farm in the Desert-Forest Experimental Centre of CAF(?;the change of E1~ E2 and E3 is ?~>~.In a word, characteristics of diversity of fungus community in different plots is the reflection of long-term interaction between fungi and geo-ecological habitat condition . Fungus diversity decreased in the sandy condition and H? A and richness indexes increased with favorable ecological habitat condition.