Plant Diversity Characteristics in Poyang Lakeside
In this paper,sand plant composition and dominant groups in the Duobao sand dunes in Poyang Lakeside were described by using line investigation.The change characteristics of plant composition,species diversity,ecological habits and life-form in the process of desertification were analyzed.The results show that:(1)There are 58 family,104 genera and 129 species in the studied area,among which Magnoliophyta play important role in the plant composition.In life-form spectrum,Phanerophytes are the most common and Therophytes are in the middle,which reflects the vegetation of region have the properties of Subtropical desert.Dominant groups are made up of Rosaceae,Papilionaceae,Compositae and Gramineae.(2) In the process of desertification,the plant composition have great changes.The dominant species on fixed dunes and unfixed sand dunes are respectively specialized and general species,and semifixed sand dunes consist of general and rare species.Species richness and diversity index are decreasing gradually with desertification.The change characteristics of ecological habits are that the percent of xerophytes are increasing gradually and mesophytes are decreasing on desertification.Hygrophytes only appear on fixed sand dunes.The increasing of Cryptophytes and decreasing of Therophytes are the main change characteristics of life-form.The life-form has changed significantly from semifixed to unfixed sand dunes stage.
process of desertificationplant diversityPoyang Lake
NETL
NSTL
万方数据
维普
