中国地理科学 ›› 2016, Vol. 26 ›› Issue (1): 99-108.doi: 10.1007/s11769-015-0746-1

• 论文 • 上一篇    下一篇

Effects of Nitrogen Deposition on Tundra Vegetation Undergoing Invasion by Deyeuxia angustifolia in Changbai Mountains

JIN Yinghua1, XU Jiawei1, WANG Yeqiao2, WANG Shaoxian3, CHEN Zhaoshuang3, HUANG Xiangtong3, NIU Lijun3   

  1. 1. School of Geographical Science, Northeast Normal University, Changchun 130024, China;
    2. University of Rhode Island, Kingston 02881, United States;
    3. Jilin Changbai Mountain Academy of Sciences, Antu 133613, China
  • 收稿日期:2014-07-01 修回日期:2014-11-24 出版日期:2016-01-27 发布日期:2015-12-18
  • 通讯作者: XU Jiawei. E-mail:xujw634@nenu.edu.cn E-mail:xujw634@nenu.edu.cn
  • 基金资助:

    Under the aupices of Special Fund of National Seismological Bureau, China (No. 201208005), National Natural Science Foundation of China (No. 41171072, 41101523)

Effects of Nitrogen Deposition on Tundra Vegetation Undergoing Invasion by Deyeuxia angustifolia in Changbai Mountains

JIN Yinghua1, XU Jiawei1, WANG Yeqiao2, WANG Shaoxian3, CHEN Zhaoshuang3, HUANG Xiangtong3, NIU Lijun3   

  1. 1. School of Geographical Science, Northeast Normal University, Changchun 130024, China;
    2. University of Rhode Island, Kingston 02881, United States;
    3. Jilin Changbai Mountain Academy of Sciences, Antu 133613, China
  • Received:2014-07-01 Revised:2014-11-24 Online:2016-01-27 Published:2015-12-18
  • Contact: XU Jiawei. E-mail:xujw634@nenu.edu.cn E-mail:xujw634@nenu.edu.cn
  • Supported by:

    Under the aupices of Special Fund of National Seismological Bureau, China (No. 201208005), National Natural Science Foundation of China (No. 41171072, 41101523)

摘要:

In recent years, herbaceous species such as Deyeuxia angustifolia (Kom.) Y. L. Chang has invaded alpine tundra regions of the western slope of the Changbai Mountains. Because atmospheric nitrogen deposition is predicted to increase under a warming climate and D. angustifolia is sensitive to nitrogen addition, field experiments were conducted from 2010 to 2013 to determine the effect of increased nitrogen deposition on the mechanisms of D. angustifolia invasion. The goal of this study is to evaluate the impact of increased nitrogen deposition on the changes in alpine tundra vegetation (consisting mostly of Rhododendron chrysanthum Pall. and Vaccinium uliginosum Linn.). The results showed that:1) simulated nitrogen deposition affected overall characteristics and structure of R. chrysanthum and V. uliginosum communities and had a positive impact on the growth of tundra vegetation invaded by D. angustifolia; 2) R. chrysanthum was more resistant to invasion by D. angustifolia than V. uliginosum; 3) simulated nitrogen deposition could improve the growth and enhance the competitiveness of D. angustifolia, which was gradually replacing R. chrysanthum and V. uliginosum and might become the dominant species in the system in future, transforming alpine tundra into alpine meadow in the Changbai Mountains.

关键词: nitrogen deposition, species invasion, Deyeuxia angustifolia, tundra vegetation, Changbai Mountains

Abstract:

In recent years, herbaceous species such as Deyeuxia angustifolia (Kom.) Y. L. Chang has invaded alpine tundra regions of the western slope of the Changbai Mountains. Because atmospheric nitrogen deposition is predicted to increase under a warming climate and D. angustifolia is sensitive to nitrogen addition, field experiments were conducted from 2010 to 2013 to determine the effect of increased nitrogen deposition on the mechanisms of D. angustifolia invasion. The goal of this study is to evaluate the impact of increased nitrogen deposition on the changes in alpine tundra vegetation (consisting mostly of Rhododendron chrysanthum Pall. and Vaccinium uliginosum Linn.). The results showed that:1) simulated nitrogen deposition affected overall characteristics and structure of R. chrysanthum and V. uliginosum communities and had a positive impact on the growth of tundra vegetation invaded by D. angustifolia; 2) R. chrysanthum was more resistant to invasion by D. angustifolia than V. uliginosum; 3) simulated nitrogen deposition could improve the growth and enhance the competitiveness of D. angustifolia, which was gradually replacing R. chrysanthum and V. uliginosum and might become the dominant species in the system in future, transforming alpine tundra into alpine meadow in the Changbai Mountains.

Key words: nitrogen deposition, species invasion, Deyeuxia angustifolia, tundra vegetation, Changbai Mountains