典型高寒植物生长繁殖特征对模拟气候变化的短期响应
Short-term responses of typical alpine plant species growth and reproductive characteristics to simulated climate change
查看参考文献24篇
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文摘
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高寒植物的生长繁殖策略对气候变化的响应十分敏感但研究较少.在青藏高原东北的祁连山南麓坡地,于2007年沿3200～3800 m海拔进行了植被的等距双向移栽实验并研究了典型高寒植物的生长繁殖策略对模拟气候变化的响应.结果表明,移栽样线年平均气温随海拔升高的递减率为0.51℃/100m.高寒植物移栽到高海拔后,其株高、基叶数、最大(小)叶面积等生长性状指标均发生显著变化,呈现出在3400 m海拔处最高,其余3海拔处较低的趋势;而生殖枝数、花数和有性繁殖投入等生殖策略的响应则不明显,但具有随海拔升高而降低,最后在3800 m处升高的变化.结果印证了气候变化对高寒植物生长性状的影响比生殖策略快速的假说. |
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其他语种文摘
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Alpine plant species are very sensitive to the climate change in their growth and reproductive characteristics,but few studies are made on it.In this paper,a reciprocal transplanted experiment was conducted along an altitude gradient from 3200 m to 3800 m at the south slope of Qilian Mountains in the northeast of Qinghai-Tibetan Plateau,aimed to understand the responses of typical alpine plant species growth and reproductive characteristics to simulated climate change.With the increase of the altitude,the mean annual air temperature decreased at a rate of 0.51 ℃/100 m,and the plant height,base leaf number,and maximum (minimum) leaf area had the peak values at 3400 m but lowered at other three altitudes.The responses of reproductive strategies such as reproductive branch number,flower number,and reproductive input were not obvious,but had a decreasing trend with increasing altitude.The results confirmed the hypothesis that climate change had more obvious effects on plant growth than on its reproductive characteristics. |
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来源
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生态学杂志
,2010,29(4):624-629 【核心库】
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关键词
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双向移栽试验
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模拟气候变化
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高寒植物
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生长繁殖特征
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地址
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1.
中国科学院西北高原生物研究所, 青海, 西宁, 810001
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陕西师范大学, 陕西, 西安, 710062
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4890 |
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学科
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普通生物学;植物学 |
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基金
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中国科学院知识创新工程西部行动计划项目
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国家自然科学基金项目
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中国-日本合作项目
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中国科学家院西北高原生物研究所百人计划项目、
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国家973计划
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中国科学院"十二五"预研重要方向资助项目
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文献收藏号
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CSCD:3849598
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