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生态学杂志 ›› 2005, Vol. ›› Issue (7): 756-762.

• 研究报告 • 上一篇    下一篇

气候变暖与荒漠-草原过渡带植物动态响应灰色分析——以美国新墨西哥州Sevilleta生态过渡带为例

刘钦普, 林振山   

  1. 南京师范大学地理科学学院, 南京, 210097
  • 收稿日期:2004-10-07 修回日期:2004-11-24 出版日期:2005-07-10
  • 通讯作者: 刘钦普,男,1957年生,博士,副教授.主要从事资源、环境与生态方面的研究,发表论文40篇.E-mail:1iuqinpu@163.com
  • 基金资助:
    国家自然科学基金项目(40371108);“十五”“211”工程重大项目;U.S.National Science Foundation under grant DEB-94-11976资助项目.

Gray analysis on responses of desert/grassland biome transition zone to global warming-A case of the desert/grassland biome transition zone in New Mexico

LIU Qinpu, LIN Zhenshan   

  1. Department of Geography, Nanjing Normal University, Nanjing 210097, China
  • Received:2004-10-07 Revised:2004-11-24 Online:2005-07-10

摘要: 在当前全球气候变暖的形势下,地表生态系统表现出不同的响应.干旱-半干旱地区的生态过渡带的生物反应更为敏感.美国新墨西哥州中部的荒漠-草原生态过渡带是监测全球气候变化和人类活动对生物影响的重要区域之一.本文以Sevilleta荒漠-草原生态过渡带为例,运用灰色系统分析方法,研究在当前全球气候变暖的条件下,1989~1998年10年间该生态过渡带的两种共存的植物优势种(Bouteloua eripoda)和(Bouteloua gracilis)历年的种群密度、组合形式和变化趋势,分析引起这些变化的主要气候因子.结果表明,Sevilleta生态过渡带中来自荒漠草原的优势物种Bouteloua eripoda的密度有上升的趋势,来自大草原的优势物种Bouteloua gracilis的密度有下降的趋势,它们的密度比大于1且有上升的趋势;在影响种群密度变化的降水、最高温度、最低温度、湿度的4个气候因子中,温度因子起着重要的作用.由此可以认为,随着气候的变暖,本区来自荒漠地区的优势植物种在荒漠-草原群落过渡带中将逐渐处于强优势地位,生态过渡带将有可能被荒漠草原所替代.

关键词: 区域农业生态系统, 环境质量, 评价

Abstract: Ecosystems on the earth exhited different responses to global warming.Biome transition zones or ecotones are considered to be particularly sensitive areas to climate changes.Sevilleta desert/grassland biome transition zone in New Mexico,USA is an important region for testing species' responses to changing environmental conditions.In this paper,changes of density,pattern and change trend of the two dominant plants,Bouteloua eriopoda and B.gracilis,in Sevilleta ecotone were studied with gray analysis method.The results showed that the density of Bouteloua eriopoda coming from deserts increased and that of B.gracilis from grassland decreased from 1989 to 1998,with the ratio between the density of B.eriopoda and that of B.gracilis over 1,and still increasing.The maximum temperature was the key factor among precipitation,temperature and humidity which contributed to the changes.The trend that the desert species B.eriopoda would strongly dominate in the mixed community indicated that Sevilleta ecotone would probably be replaced by desert grassland with global warming continuing.

Key words: Regional agro-ecosystem, Environmental quality, Assessment

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