Vertical Spatial Distribution Patterns of Dominant Herbs Biomass in Jiuzhaigou Manaoke Golden Mine Valley Sichuan,China

To evaluate the effect of ecological restoration and biodiversity,as well as screen species,five dominant aboriginal herb species(ie.Deyeuxila scabrescens(Griseb.) Munro,Festuca ovina L.,Kobresia setchwanensis Hand.-Mazz.,Poa acroleuca Steud.and Elymus nutans Griseb.) were selected to study dimensional allocation of biomass based on bio-diversity investigation at the similar habitat in Manaoke Mine in 2008.Results show that: the distribution and coverage of D.scabrescens(18.86%) and F.ovina(15.29%) is greater among five species in the survey area while their biomass(is 2003.74 kg/hm2 and 1507.42 kg/hm2 respectively) is also larger.The sequence of the five herbs' aver-biomass is D.scabrescensF.ovinaK.setchwanensisP.acroleucaE.nutans.Their aboveground biomass has significant positive correlation with their underground biomass(P0.01).The five herbs' biomass are significantly rates with their altitude distribution(P0.01).However,there are different relationships among five species between biomass and altitude distribution.The herb biomass of slope-ridge is apparently smaller than that of slope-valley.The coverage of dominant herb species changes with the seasons.Finally,the article emphasizes that different herb species should be selected to restore the Mine with different altitudes,slope gradients and seasons for maintaining biodiversity and eco-system stability.Meanwhile the resources of Mine should be used effectively.