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cje ›› 2005, Vol. ›› Issue (5): 473-477.

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Analysis on transitional feature of Saihanba spermatophyte flora in Hebei Province

WANG Qingsuo1, LI Yuzhong1, LU Duanzheng2, LUO Juchun2, FENG Zongwei3   

  1. 1. Institute of Agricultural Environment and Sustainable Development, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. Forest Resources and Environment College, Beijing Forestry University, Beijing 100083, China;
    3. Research Center for Eco-Environment, Chinese Academy of Sciences, Beijing 100085, China
  • Received:2003-12-27 Revised:2004-03-01 Online:2005-05-10

Abstract: Saihanba is located in the forest-steppe ecotone in northern Hebei Province of China.The spermatophytes in Saihanba flora were abundant,which includes 75 families,318 genera and 713 species or varieties.According to the floristic geographic elements in Saihanba flora,the northern temperate,cosmopoltan and palaeo-temperate was to the 47.65%,15.36% and 14.11% of the total 313 spermatophyte genera respectively,while the others were rare.Based on plant life-form,the phanerophytes,chamaephytes,hemicryptophytes,geophytes and therophytes were 16.27%,1.54%,40.95%,25.39% and 15.85% of the total spermatophytes respectively in Saihanba region.Compared with the other five surrounding regions using the principal component method,Saihanba was an obvious forest-steppe transitional flora.The relationships of Saihanba flora with Songshan Mountain flora in the forest zone and Xilinhe River Basin flora in the steppe zone were closer than those with the other region floras.

Key words: Nitrogen mineralization, Land use pattern, Human disturbance

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