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- W2294825744 abstract "By a field investigation and data analysis,we developed a static life table of Populus euphratica popu-lation based on the population life table and theory of survival analysis.Survivorship curves,survival rate,cumulative mortality rate,mortality density and hazard rate were determined,and population dynamics were analyzed using time sequence analysis and flop index.The results show:(1) Younger and older individuals of age structure of P.euphratica population have fewer percentages and the survivorship curve of the population conforms to skewed normal distribution,belonging to degenerative growth type.Development index is less than 0,it explains there are lack of the seedlings in lower reaches.Population structure is not rational.(2) One peak of mortality rate and killing power exist in the lifespan after 30 years.The population survival rate of P.euphratica decreases monotonically,whereas the cumulative mortality rate increases monotonically.(3) Time sequence prediction models for the population after 10,20,30 years show that the numbers of older individuals would be increasing,and the number of younger individuals be more lack.Ultimately,the number of older individuals also be decrea-sing." @default.
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- W2294825744 date "2010-01-01" @default.
- W2294825744 modified "2023-09-24" @default.
- W2294825744 title "Characteristics and dynamics of Populus euphratica population at lower reaches of Tarim River" @default.
- W2294825744 hasPublicationYear "2010" @default.
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