高寒草甸不同植被功能群盖度对模拟气候变化的初期响应

doi:10.11733/j.issn.1007-0435.2010.06.004

›› 2010, Vol. 18 ›› Issue (6): 768-772,779.DOI: 10.11733/j.issn.1007-0435.2010.06.004

高寒草甸不同植被功能群盖度对模拟气候变化的初期响应

张法伟^1,2,3, 李跃清¹, 李英年^2,3, 李以康^2,3, 林丽^2,3, 曹广民^2,3, 杜明远⁴, 王勤学⁵

1. 成都高原气象所, 四川, 成都, 610071;
2. 中国科学院西北高原生物研究所, 青海, 西宁, 810001;
3. 中国科学院高原生物适应与进化重点实验室, 青海, 西宁, 810001;
4. 日本农林环境技术研究所, 日本, 筑波, 3058604;
5. 日本国立环境研究所, 日本, 筑波, 3050053

收稿日期:2010-02-03 修回日期:2010-10-18 出版日期:2010-12-15 发布日期:2010-12-15
作者简介:张法伟(1981- ),男,河南义马人,硕士,工程师,主要从事高寒草甸对气候变化的响应研究,E-mail:flingzhang@gmail.com
基金资助:
成都高原气象开放实验室基金课题(LPM2008011);中国科学院西部行动计划项目(KZCX2-XB2-06-01),中国科学院创新工程重要方向项目(KJCX2-YW-432-1h和KSCX2-YW-Z-1020)资助

Initial Response of Plant Functional Groups Abundance to Simulated Climatic Change in Alpine Meadow Ecosystems

ZHANG Fa-wei^1,2,3, LI Yue-qing¹, LI Ying-nian^2,3, LI Yi-kang^2,3, LIN Li^2,3, CAO Guang-min^2,3, DU Ming-yuan⁴, WANG Qin-xue⁵

1. Institute of Plateau Meteorology, China Meteorological Administration, Chengdu, Sichuan Province 610071, China;
2. Northwest Institute of Plateau Biology, CAS, Xining, Qinghai Province 810001, China;
3. Key Laboratory of Adaptation and Evolution of Plateau Biota, CAS, Xining, Qinghai Province 810001, China;
4. National Institute of Agro-environmental Sciences, Tsukuba 3058604, Japan;
5. National Institute of Environmental Studies, Tsukuba 3050053, Japan

Received:2010-02-03 Revised:2010-10-18 Online:2010-12-15 Published:2010-12-15

摘要/Abstract

摘要： 为进一步研究高寒生态系统植被群落对气候变化响应方式和适应机理,我们在青藏高原东北祁连山南坡,沿海拔梯度对嵩草(Kobresia bellardii)草甸、灌丛草甸、杂草草甸和稀疏植被4种植被类型进行双向移栽实验,以期获得高寒草甸植被群落较为详尽而真实的响应特征。4个功能群(莎草类、禾本类、豆科类和杂草类)绝对盖度的方差分析结果表明:高寒草甸生态系统植被群落对气候变化较为敏感。莎草类植被盖度与土壤含水量线性负相关,在3600 m处最大。禾本类和豆科类分别与土壤含水量和气温线性正相关,两者在3200 m处最为适宜。海拔与杂草类盖度的二次方程可解释其63%的变异。莎草类与禾本类、豆科类植被盖度存在较弱的补偿作用,而禾本类与豆科类之间具有显著的补充作用。对比80年代的植被盖度,嵩草草甸优势种对模拟降温的响应暗示其稳定性较高。

关键词: 双向移栽实验, 植被绝对盖度, 功能群, 高寒生态系统

Abstract: For further understanding the response and adaptation of alpine plant community to climate change,we manipulated the reciprocal translocated experiment along elevation gradients on the south slope of Qili Mountains,in the northeast of Qinghai-Tibetan Plateau.The experiment included 4 vegetation types,Kobresia bellardii meadow,shrub meadow,forbs meadow and sparse vegetation.Plant absolute cover was measured by 0.5 m×0.5 m Cross-Hair Point Frame(100 points).4 functional groups were classified as sedges,graminoids,legumes and forbs.ANOVA results showed that plant absolute cover of 4 functional groups was relative sensitive to climate change.Sedge cover correlated negative linearly with soil water content,and its peak abundance appeared in 3600 m.Graminoid and legume cover was linearly related to soil water content and temperature,respectively,and both of them behaved significantly better in 3200 m.The quadratic regression equations between forbs and elevation accounted for 63% variances.There was weak cover compensation effects between sedge and graminoid and legume while strong abundance complementary effects between graminoid and legume.The comparison between dominate plant cover change-induced by simulated cooling with survey during 1980s in the similar temperature,indicated that the Kobresia bellardii meadow was stable.

Key words: Reciprocal translocated experiment, Plant absolute cover, Functional groups, Alpine ecosystem

中图分类号:

Q142
Q948

张法伟, 李跃清, 李英年, 李以康, 林丽, 曹广民, 杜明远, 王勤学. 高寒草甸不同植被功能群盖度对模拟气候变化的初期响应[J]. , 2010, 18(6): 768-772,779.

ZHANG Fa-wei, LI Yue-qing, LI Ying-nian, LI Yi-kang, LIN Li, CAO Guang-min, DU Ming-yuan, WANG Qin-xue. Initial Response of Plant Functional Groups Abundance to Simulated Climatic Change in Alpine Meadow Ecosystems[J]. , 2010, 18(6): 768-772,779.

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高寒草甸不同植被功能群盖度对模拟气候变化的初期响应

Initial Response of Plant Functional Groups Abundance to Simulated Climatic Change in Alpine Meadow Ecosystems

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