Undergrowth plant diversity in the northern part of secondary forest in Hanshan Mountain,Inner Mongolia
[Objective]Qingshan Reserve is a typical area in the northern section of the secondary forest in Hanshan,Inner Mongolia,in order to understand the characteristics of plant diversity under the forest death gradient in the northern section of the Hanshan secondary forest in Inner Mongolia,and to provide a basis for scientific protection and utilization of forest autogenous plant communities and explore plant communities more suitable for forest development.[Method]Taking the secondary forest of Populus davidiana in Qingshan Reserve as the research object,the plant composition of different dead gradients was investigated by sample survey method,and the differences in plant composition and diversity were analyzed by using biodiversity index and community similarity coefficient.[Result]There were 45 plant species in the northern section of Hanshan secondary forest area,Inner Mongolia,including 9 species of trees,5 species of shrubs and 31 species of herbs,and the number of plant species in the sample plot was as follows:mild death plot＞severe death plot＞moderate death plot.The Simpson and Shannon-Wiener indices in the same field showed mildly dead stands＞severely dead stands＞moderately dead stands.Moderately dead plots had the highest richness and Pielou uniformity index.The greatest variation in communities within mildly fatal plots was found by PCoA analysis.The SI index was in the range of 55％-61％,there were 13 species in different death gradient forest stands,the difference between the relative coefficient of the tree layer and the shrub layer was not large,and the reduction benefit of herbaceous diversity was obvious,resulting in the difference of SI index of different death gradient forest stands became larger,and overall,with the increase of aspen mortality degree,the difference in vegetation composition also increased.[Conclusion]The mass forest mortality inhibits the development of herbaceous plant diversity,but promotes the renewal of trees and shrubs.The dominance of aspen in the study area declined,and whether the diversity of forest renewal could form mixed forests needed to be further studied.[Ch,4 fig.3 tab.26 ref.]
DaxinganlingHanshan secondary forestplant diversitycommunityforest death
万方数据
维普
