干旱区生态环境知识资源中心(Arid): 增温对荒漠草原植物群落组成及物种多样性的影响

Arid

	增温对荒漠草原植物群落组成及物种多样性的影响
其他题名	Effect of warming on plant community composition and plant species diversity in the desert steppe
	王晨晨; 王珍; 张新杰; 李寅龙; 刘军利; 韩国栋
来源期刊	生态环境学报
ISSN	1674-5906
出版年	2014
卷号	23 期号:1 页码:43-49
中文摘要	以短花针茅荒漠草原为研究对象,通过采用远红外线辐射器模拟增温的方法,探讨了增温对荒漠草原植物群落结构及生物量和物种多样性的影响。结果表明:由于远红外线辐射器的增温作用,在2012年整个生长季内,增温样地10、20、30 cm土壤平均温度与对照样地相比,平均增加了0.39、0.38、0.31 ℃;各土层土壤含水量较对照平均减少0.76%、0.73%、0.60%。受温度升高及土壤含水量减少的影响,模拟增温6个生长季后,与对照样地相比,群落的高度整体增加,密度、盖度、频度表现为部分物种增加和部分物种减少的趋势,冷蒿(Artemisia frigida)等物种的重要值下降,阿氏旋花(Convolvulus ammanii)等物种的重要值上升,但是增温没有明显改变植物群落的组成。同时,增温处理使荒漠草原禾草的盖度减少,杂类草的盖度增加,半灌木和一两年生植物分盖度未发生明显变化;增温使地上地下生物量出现了不同程度的减少,在0~30 cm土壤深度地下生物量分配中,增温样地0~10 cm分配比例(81.23%)小于对照(86.07%),10~20 cm分配比例(11.55%)大于对照(9.16%);20~30 cm分配比例(7.22%)大于对照(4.77%),增温使得地下生物量分配格局向深层转移。增温后,增温样地植物Shnnon-Winener指数降低,Pielou均匀度指数升高,温度升高使荒漠草原植物群落的均匀度增加,但并没有提高草地植物的物种多样性。
英文摘要	The effect of warming on plant community structure and species diversity was studied in the Stipa brevifora desert stppe by using infrared radiation method to simulate global warming. The results showed as follows: Compared with control (CK), the soil temperatures increased by 0.39, 0.38 and 0.31 ℃ at depths of 10, 20 and 30 cm, respectively, under the warmed plots in the whole plant growing season of 2012, whereas soil water content was decreased 0.76%、0.73%、0.60% in different soil depth, respectively; The change of plant community height, density, frequentness and diversity was found due to the elevated soil temperature and the decreasing soil water content. The structure of plant community has also been changed by warming. The warming significantly decreased the important value of Artemisia frigida, but it significantly increased the important value of Convolvulus ammanii. In addition, warming significant increased the coverage of grasses, whereas it significantly increased the coverage of forbs. No change was detected for semi-shrub and annual-biennial. Warming significantly decreased plant community above- and below-ground biomass allocation pattern transferred to deep soil layers. The below-ground biomass of 0-10 cm soil layers was lower in warming than in control, but below-ground biomass of 10-20 cm was higher in warming (11.55%) than in control (9.16%) and 20-30 cm was higher in warming (7.22%) than in control (4.77%). Warming led to the transfer of below-ground biomass from upper layer to lower layer. Warming significantly decreased Shnnon-Winener index, but significant increased Pielou index by elevated temperature. Warming significantly increased evenness of desert steppe, whereas no change on plant species diversity.
中文关键词	增温 ; 荒漠草原 ; 植物群落组成 ; 物种多样性
英文关键词	warming desert steppe plant community structure species diversity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY ; PLANT SCIENCES
WOS研究方向	Agriculture ; Plant Sciences
CSCD记录号	CSCD:5107371
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231542
作者单位	内蒙古农业大学生态环境学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	王晨晨,王珍,张新杰,等. 增温对荒漠草原植物群落组成及物种多样性的影响[J]. 内蒙古农业大学,2014,23(1):43-49.
APA	王晨晨,王珍,张新杰,李寅龙,刘军利,&韩国栋.(2014).增温对荒漠草原植物群落组成及物种多样性的影响.生态环境学报,23(1),43-49.
MLA	王晨晨,et al."增温对荒漠草原植物群落组成及物种多样性的影响".生态环境学报 23.1(2014):43-49.