Studies On The Flora And Distribution Characteristics Of Lichen In The Source Of Fenhe River, Shanxi Province

Lichen can be regarded as a monitor of the pollution,because of its sensitive to air pollution.It is more sensitive than vascular plant to environmental change.The component of lichen species and the change of quantity in one area is the indicator of the variety of ecosystem.Study of the lichen flora plays an important part to the natural protection of the source of Fenhe River.Based on more than 160 specimens collected in the source of Fenhe River,comprehensive study is carried on from morphology,chemistry, anatomy and distribution in China.The specimens used in this study are deposited in the Herbarium of Shanxi University(SXU).There are 160 species are identified,which are belong to 24 genera and 16 families.Among them,11 genera are newly recorded from Shanxi Province.Normandina,Candelaria,Rhizocarpon,Thamnolia,Pseudocyphellaria,Solorina,Umbilicaria,Candelariella,Haematomma,Verrucaria,Pyxine.Twentyfour species are newly recorded from Shanxi Province.Normandina pulchella,Collema fasciculare,Cladonia pleurota,Parmelia ruderata,P.saxatilis,P.xanthocarpa,Candelaria concolor,Lecidea albocoerulescens,L.mollis,Rhizocarpon geographicum,Thamnolia vermicularis,Coccocarpia cronia,Pseudocyphellaria aurata,Peltigera erumpens,Solorina spongiosa,Umbillicaria cinerascens,Lecanora atra,L.hageni,L.muralis,L.Saligna,Haematomma puniceum,Verrucaria muralis,Pyxine berteriana,Physcia tribacia.In this research,the habitat and geographic composition of lichen are analysised in the region of the source of Fenhe River.As well as the mutal genera and species are compared among the lichen from Shenglongjia,Tibet, Xinjiang.It's showed that the flora of the source of Fenhe River has the elements of Temperate,Boreal,East Asian and Tropical et al.It's notable that the characteristics of East Asian and transition have some relationship with the tropical and subtropical.The research indicated the characteristics of the flora of the source of Fenhe River.Firstly,it is abundant in species.Secondly,the dominant families and genera are obvious.There are certain elements of East Asia, the link-specific phenomenon was not obvious.