Numeric dynamics of ex situ Dendrobium fimbriatum population
By using static life table, fecundity schedule, and Leslie matrix model, this paper studied the numeric dynamics of ex-situ population of endangered orchid Dendrobium fimbriatum in Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, and assessed the ex-situ conservation effect of the species. The age pyramid of the population was kettle-shaped, and the net reproduction rate ( R0) , intrinsic increase rate ( rm ) , and finite increase rate ( λ ) were lower, being 0.569, -0.089, and 0.915, respectively, indicating that the ex-situ population was in a decreasing trend. The analysis of Leslie matrix model showed that in the next 50 years, the individual number and the total number of the ex-situ population would have a continuous decrease. Based on this analysis, it was suggested that 1) increase the lithophytic habitat in ex-situ conservation to make the asexual reproduction buds grow better after leaving maternal, and 2 ) enhance the mature individuals' reproductive capability by assisted management and carry out further study to realize the seed symbiotic germination.
Dendrobium fimbriatumex-situ conservationpopulation numeric dynamicsLeslie matrix model
国家科技期刊平台
NSTL
万方数据
维普
