Analysis and Comparison on Population Dynamics between Adenophora lobophylla and Adenophora potaninii by Leslie Matrix

摘要

The population dynamic tendency of Adenophora lobophylla Hong as an endangered species and Adenophora potaninii Korsh as widespread species, has been predicted by the Leslie matrix. And the comparison and analysis on the age structures between two species have been carried out in this paper. The results demonstrate the A lobophylla populations which have the reasonable age structures perform slowly negative or positive increment at altitude 2300-3400 m. Especially. below altitude 2700 m, there are many populations performing seriously declining tendency. Contrary A potaninii popula- tions could adapt to environment perfectly at the corresponding condition without finding the population which performs the seriously declining tendency. The differences in developing tendency of population between the two species demonstrate that A lobophylla populations have the weaker ability to adapt to the external unfavorable conditions.