| 短期增温对青藏高原高寒草甸植物群落结构和生物量的影响 |
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| 引用本文： | 李娜,王根绪,杨燕,高永恒,柳林安,刘光生. 短期增温对青藏高原高寒草甸植物群落结构和生物量的影响[J]. 生态学报, 2011, 31(4): 895-905 |
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| 作者姓名： | 李娜 王根绪 杨燕 高永恒 柳林安 刘光生 |
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| 作者单位： | 1. 山地环境演变与调控重点实验室,中国科学院成都山地灾害与环境研究所,成都,610041;中国科学院研究生院,北京,100049
2. 山地环境演变与调控重点实验室,中国科学院成都山地灾害与环境研究所,成都,610041 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)资助项目(2007CB411504) |
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| 摘 要： | 采用增温棚模拟增温的方法,对比研究了青藏高原腹地典型高寒草甸和沼泽草甸在两种增温梯度条件下植物群落结构及植物生长对温度升高的初期响应。由于开顶式生长室(OTC)的增温作用,在整个生长季内,沼泽草甸月平均气温分别较对照提高2.98℃ (OTC1)和 5.52℃((OTC2),20cm处土壤水分分别减少了2.45%(OTC1)和3.44%(OTC2);高寒草甸月平均气温分别比对照升高了2.59℃(OTC1)和 5.16℃ (OTC2)。20cm处土壤水分分别减少了1.83%(OTC1)和7.71%(OTC2)。受温度升高及土壤含水量减少的影响,模拟增温2个生长季后,与对照样地相比,群落种群高度、密度、盖度、频度和重要值发生变化,群落结构也发生一定变化。增温处理使高寒草甸禾草和莎草盖度减少,杂草盖度增加,而使沼泽草甸中禾草和莎草盖度增加,杂草盖度减少。增温后,两种草甸总生物量均增加,但大幅度的增温条件抑制了高寒草甸的这种促进作用,而促进了沼泽草甸的这种促进作用。两种草甸的地下生物量主要分布在土壤表层,模拟增温使得高寒草甸的生物量分配格局向深层转移,但不明显;而使沼泽草甸生物量明显的趋向深层土壤中转移。
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| 关 键 词： | 高寒草甸 开顶式生长室 温度升高 群落结构 分配格局 青藏高原 |
| 收稿时间： | 2010-01-06 |
| 修稿时间： | 2010-03-15 |
Short-term effects of temperature enhancement on community structure and biomass of alpine meadow in the Qinghai-Tibet Plateau |
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| LI N,WANG Genxu,YANG Yan,GAO Yongheng,LIU Linan and LIU Guangsheng. Short-term effects of temperature enhancement on community structure and biomass of alpine meadow in the Qinghai-Tibet Plateau[J]. Acta Ecologica Sinica, 2011, 31(4): 895-905 |
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| Authors: | LI N WANG Genxu YANG Yan GAO Yongheng LIU Linan LIU Guangsheng |
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| Affiliation: | Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China;Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China;Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China;Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China;Key Laboratory of Mountain Environment Evolvement and Regulation, Institute of Mountain Hazards and Environment, Chengdu, Chinese Academy of Sciences, Chengdu 610041, China; Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | |
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| Keywords: | alpine meadow open-top chamber artificial warming community structure allocation pattern Qinghai-Tibet Plateau |
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