高寒草甸不同功能群植被盖度对模拟气候变化的短期响应

草业学报 ›› 2010, Vol. 19 ›› Issue (6): 72-78.

高寒草甸不同功能群植被盖度对模拟气候变化的短期响应

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:2010-01-08 出版日期:2010-06-25 发布日期:2010-12-20
作者简介:张法伟(1981-),男,河南义马人,工程师,硕士。
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)和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

Shortterm response of functional plant groups abundance to simulated climate change in alpine meadow ecosystems

ZHANG Fawei1,2,3, LI Yueqing1, LI Yingnian2,3, LI Yikang2,3, LIN Li2,3, CAO Guangmin2,3,DU Mingyuan4, WANG Qinxue5

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

Received:2010-01-08 Online:2010-06-25 Published:2010-12-20

摘要/Abstract

摘要： 为研究高寒生态系统植被群落对气候变化的响应,于2007年5月沿青藏高原东北祁连山南坡对海拔3200m的嵩草草甸、3400m的灌丛草甸、3600m的杂草草甸和3800m的稀疏植被进行双向移栽试验。功能群(莎草类、禾本类、豆科类和杂类草)植被绝对盖度的方差分析表明高寒草甸植被群落对气候变化较为敏感。莎草类盖度与土壤含水量呈负线性相关,禾本类和豆科类分别与土壤含水量和气温呈正线性相关。海拔与杂类草盖度的二次方程可解释其61%的变异。非度量多维排序(non-metricmulti-dimensionalscaling,NMDS)暗示功能群对气候变化的响应具有特殊性。豆科类和杂类草、莎草类和禾本类存在较弱的盖度补偿效应。对比早期和模拟降温下的嵩草草甸群落组成,印证其具有较高的稳定性。

Abstract: For further understanding the response of alpine plant communities to climate change, we manipulated a reciprocal translocation experiment along the elevation gradients on the south slope of the Qilian Mountains, in the northeast Qinghai-Tibetan Plateau in May 2007. The translocated vegetation comprised 3 200 m of Kobresia meadow, 3 400 m of shrub meadow, 3 600 m of forbs meadow, and 3 800 m of sparse vegetation. Four functional groups (FG) were classified as sedge, graminoid, legume and forbs. An ANOVA of FG abundance showed that alpine plant communities were sensitive to climate change. Sedge cover correlated negatively and linearly with soil water content. Graminoid and legume abundance were linearly related to soil water content and temperature, respectively. The Quadratic equations between forbs and elevation accounted for 61% of variation. NMDS (nonmetric multidimensional scaling) indicated that FG responded specially. There was a weak abundance compensation effect between legumes and forbs, sedges, and graminoids. The comparison between the plant community in Kobresia meadow under simulated cooling and historical survey, confirmed it was stable. 

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. 高寒草甸不同功能群植被盖度对模拟气候变化的短期响应[J]. 草业学报, 2010, 19(6): 72-78.

ZHANG Fawei1,2,3, LI Yueqing1, LI Yingnian2,3, LI Yikang2,3, LIN Li2,3, CAO Guangmin2,3,DU Mingyuan4, WANG Qinxue5. Shortterm response of functional plant groups abundance to simulated climate change in alpine meadow ecosystems[J]. Acta Prataculturae Sinica, 2010, 19(6): 72-78.

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