欢迎访问《植物研究》杂志官方网站,今天是 分享到:

植物研究 ›› 2011, Vol. 31 ›› Issue (2): 206-212.doi: 10.7525/j.issn.1673-5102.2011.02.014

• 论文 • 上一篇    下一篇

3种高山植物的物候和种群分布格局在融雪梯度上的变化

陈文年1,2;吴彦2;吴宁2*;罗鹏2   

  1. 1.内江师范学院生命科学系,内江 641112;2.中国科学院成都生物研究所,成都 610041
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-03-20 发布日期:2011-03-20
  • 通讯作者: 吴宁
  • 基金资助:
     

Variation in Phenology and Population Distribution Pattern of Three Alpine Species Along the Snowmelt Gradient

CHEN Wen-Nian;WU Yan;WU Ning*;LUO Peng   

  1. 1.Department of Life Science,Neijiang Normal University,Neijiang 641112;2.Chengdu Institute of Biology,Chinese Academy of Science,Chengdu 610041
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-03-20 Published:2011-03-20
  • Contact: WU Ning
  • Supported by:
     

摘要: 在青藏高原东部的一个高山雪床,沿着融雪梯度分别设置早融、中间和晚融3个融雪部位,然后测定川西小黄菊(Pyrethrum tatsienense)、长叶火绒草(Leontopodium longifolium)和圆穗蓼(Polygonum macrophyllum)在3个融雪部位上的物候差异以及种群分布格局的变化。结果表明:从早融到晚融的梯度上,3个物种的物候期都不同程度地有所推迟。其中,开始生长的时间推迟12~14 d,始花期推迟6~8 d,盛花期推迟6 d左右,但同一种植物在不同的融雪部位上的衰老枯黄期趋于一致,这标志着在晚融部位同一植物的生长期要缩短。在种群层次上,长叶火绒草和圆穗蓼的分布格局随着融雪的推迟都发生了一定的变化,基本上表现为从早融部位的集群分布到中间或晚融部位的随机分布。川西小黄菊在各个融雪部位上都表现为集群分布,但集群的强度随融雪的推迟逐渐减弱。

关键词: 高山雪床, 物候, 种群分布格局, 融雪梯度

Abstract: In an alpine snowbed on the eastern Tibetan Plateau, three portions were established along snowmelt gradient. At each portion, the phenology and population distribution pattern of three alpine species(Pyrethrum tatsienense, Leontopodium longifolium and Polygonum macrophyllum) were tested. The results showed that from early-to late-melting portion, phenological phases of three species delayed to different extents. Plant emergence delayed 12-14d, first flowering delayed 6-8 d and peak flowering delayed nearly 6 d. For each species, however, consenescence at three portions did not differed significantly, indicating that growing season length of a species at late-melting portion shortened. At population level, the distribution pattern of Leontopodium longifolium and Polygonum macrophyllum varied as the snowmelt delayed, changing from cluster pattern at early-melting portion to random pattern at late-melting or medium portion. Pyrethrum tatsienense showed cluster pattern at three portions. However, its intensity of cluster weakened as the snowmelt delayed.

Key words: alpine snowbed, phenology, population distribution pattern, snowmelt gradient

中图分类号: