Biodiv Sci ›› 2004, Vol. 12 ›› Issue (1): 123-130.DOI: 10.17520/biods.2004015

Special Issue: 探索中国山地植物多样性的分布规律

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Composition and dominant species of soil seed bank along an altitudinal gradient in Mt. Taibai, Qinling Mountains

ZHANG Ling, FANG Jing-Yun   

  1. Department of Ecology,College of Environmental Sicences,Center for Ecological Research & Education,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing 100871
  • Received:2003-06-12 Revised:2003-09-10 Online:2004-01-20 Published:2004-01-20
  • Contact: ZHANG Ling

Abstract: We analyzed patterns of species composition and dominance in the soil seed bank along the southern slope of Mt. Taibai, Qinling Mountains. The results are summarized as follows: (1) in terms of seed number, dominant families varied along the altitudinal gradient. According to species number, there were 4 dominant families in the seed banks between 1600 m and 2600 m a.s.l., which was higher than those of other altitudes. Rosaceae was the family with the richest species in the seed bank; (2) Betula utilis occurred in 16 out of 21 plots. The dominance of Betula utilis and Abies fargesii showed a unimodal pattern along the altitudinal gradient, and (3)  combining analysis of life form composition and dominant species, trees played a dominant role in the composition of seed banks, while shrub species did not significantly influence species and individual composition of seed banks in Mt. Taibai.