Biodiversity Science ›› 2001, Vol. 09 ›› Issue (2): 151-156.doi: 10.17520/biods.2001023

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Studies on the endangerment mechanism of and conservation strategies for Changium smyrnioides

QIU Ying-Xiong, FU Cheng-Xin   

  1. Laboratory of Systematic and Evolutionary Botany and Biodiversity , College of Life Sciences , Zhejiang University , Hangzhou  310029
  • Received:2000-07-10 Revised:2001-02-13 Online:2001-05-20
  • QIU Ying-Xiong

The resource , the population ecology , structure and characters of seeds , pollination biology and the relationship between plumpness of seeds and environment were investigated in the rare plant Changium smyrnioides . The genetic diversity and genetic structure of the species were analysed by morphological characters of seeds , starch gel elect rophoresis and RAPD analysis. The studies revealed lack of coordination between the ripening of the seeds and the season of East China , which resulted in low ratio of seed germination and low rate of population renewal. As human activity has dest royed and disturbed suitable habitat for the species , the range of each population has decreased and the habitat has become f ragmented which has decreased gene flow between populations ( Nm < 1. 0) . The low gene flow suggests that genetic drift may play a prominent role in shaping the present-day genetic composition. Based on these result s , some management st rategies are proposed for protecting this species effectively.

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