干旱区生态环境知识资源中心(Arid): 祁连山北坡霸王花大小-数量权衡关系的坡向差异

Arid

	祁连山北坡霸王花大小-数量权衡关系的坡向差异
其他题名	Trade-off relationship between the flower biomass and number of Zygophyllum xanthoxylum on different slope aspects in northern slope of Qilian Mountains
	韩玲; 赵成章; 徐婷; 段贝贝; 郑慧玲; 冯威
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2016
卷号	35 期号:6 页码:1497-1503
中文摘要	权衡关系是植物生活史对策理论的基础,花大小-数量的权衡关系对理解花构件的资源分配具有重要意义。本文采用GIS与实验生态学相结合的方法,研究了祁连山北坡荒漠草原不同坡向霸王(Zygophyllum xanthoxylum)花大小-数量的关系。结果表明:随着坡向由北坡向东坡、西坡、南坡转变,草地植物群落的高度、密度、地上生物量、土壤含水量以及霸王的花大小、分枝数和枝干重呈逐渐减小趋势,霸王的花数量和繁殖分配逐渐增大;北坡和南坡霸王的花大小和花数量之间呈极显著负相关(P<0.01),异速斜率显著小于-1,东坡和西坡霸王的花大小和花数量之间呈显著负相关(P<0.05),异速斜率接近于-1。不同坡向霸王在花大小与花数量间此消彼长的资源分配权衡关系,反映了植物优化生境适应性的种群繁殖策略。
英文摘要	Trade-off is the basis of the theory on plant life-history strategies,and the trade-off between flower size and flower number is an important determinant of flower biomass allocation. In this study,GIS and the method of experimental ecology were used to study the relationship between flower size and number of Zygophyllum xanthoxylum in response to slope aspects located in desert grasslands on the northern slope of Qilian Mountains,Northwest China. The results showed that the height,density,above-ground biomass,soil moisture content of the plant community and flower size,twig number,dry weight of Z. xanthoxylum displayed a pattern of gradual decrease with the aspect turning from north,east,west to south,while the flower number and reproductive allocation of Z. xanthoxylum displayed a pattern of gradual increase. The flower size was highly significantly negatively correlated with flower number on the north slope and south slope (P<0.01), and the slopes of the regressions were significantly less than -1,whereas it was significantly negatively correlated with flower number on the east slope and west slope (P<0.05), and the slopes of the regressions were close to -1. The trade-off relationship of resource allocation between the flower size and flower number of Z. xanthoxylum in different slope aspects reflected the population reproduction strategy via optimizing habitat adaptability of plant.
中文关键词	坡向 ; 花数量 ; 花大小 ; 霸王 ; 权衡 ; 荒漠
英文关键词	slope aspect flower number flower size Zygophyllum xanthoxylum trade-off desert area
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5716779
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234864
作者单位	西北师范大学地理与环境科学学院, 甘肃省湿地资源保护与产业发展工程研究中心, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	韩玲,赵成章,徐婷,等. 祁连山北坡霸王花大小-数量权衡关系的坡向差异[J]. 西北师范大学,2016,35(6):1497-1503.
APA	韩玲,赵成章,徐婷,段贝贝,郑慧玲,&冯威.(2016).祁连山北坡霸王花大小-数量权衡关系的坡向差异.生态学杂志,35(6),1497-1503.
MLA	韩玲,et al."祁连山北坡霸王花大小-数量权衡关系的坡向差异".生态学杂志 35.6(2016):1497-1503.