期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 113, 期 16, 页码 4380-4385出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1520582113
关键词
alpine treeline; treeline dynamics; climate change; interspecific competition; Tibetan Plateau
资金
- Southeast Tibet Station for Alpine Environment, Observation and Research, Chinese Academy of Sciences
- Third Pole Environment Database
- National Basic Research Program of China [2012FY111400]
- National Natural Science Foundation of China [41525001, 41130529, 41301207]
- Youth Innovation Promotion Association, CAS
- European Research Council [SyG-2013-610028 IMBALANCE-P]
The alpine treeline is commonly regarded as being sensitive to climatic warming because regeneration and growth of trees at treeline generally are limited by low temperature. The alpine treelines of the Tibetan Plateau (TP) occur at the highest elevations (4,900 m above sea level) in the Northern Hemisphere. Ongoing climatic warming is expected to shift treelines upward. Studies of treeline dynamics at regional and local scales, however, have yielded conflicting results, indicating either unchanging treeline elevations or upward shifts. To reconcile this conflict, we reconstructed in detail a century of treeline structure and tree recruitment at sites along a climatic gradient of 4 degrees C and mean annual rainfall of 650 mm on the eastern TP. Species interactions interacted with effects of warming on treeline and could outweigh them. Densification of shrubs just above treeline inhibited tree establishment, and slowed upward movement of treelines on a time scale of decades. Interspecific interactions are major processes controlling treeline dynamics that may account for the absence of an upward shift at some TP treelines despite continued climatic warming.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据