干旱区生态环境知识资源中心(Arid): 甘肃民勤连古城自然保护区优势种种群结构和动态研究

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	甘肃民勤连古城自然保护区优势种种群结构和动态研究
其他题名	Community Structures and Dynamics of Dominant Species in Minqin Liangucheng Nature Reserve of Gansu Province
	李昌龙 1; 马瑞君 1; 王继和2 ; 李爱德 2; 严子柱 2; 李得禄 2
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2005
卷号	25 期号:8 页码:1628-1636
中文摘要	通过重要值、分布格局、年龄结构、静态生命曲线等方法研究了连古城自然保护区5种群落优势种群数量在时间上和空间上的变化趋势。研究结果表明：灌木荒漠群落中，优势种群或共优种群的重要值远远大于亚优势种群，在维持群落结构和功能方面占据十分重要的地位。除红砂群落外，其它类型的群落中，都具有相同的亚优势种群，即泡泡刺种群，表明泡泡刺种群具有较宽的生态幅是比较古老的种群，其它类型的种群是在这一种群基础上发展起来的。优势种群的分布格局由种群生物学特性和环境条件等诸多因子共同决定，膜果麻黄和绵刺种群呈集群分布，而其它种群呈随机分布。优势种群的年龄结构和静态生命曲线均呈现多样化，膜果麻黄、猫头刺和甘蒙锦鸡儿种群年龄结构为增长型锥体，静态生命曲线为凹型下降，均为稳定种群；绵刺种群的年龄结构为下降型锥体，静态生命曲线为反对角线型上升，但其营养繁殖策略决定了绵刺种群为稳定种群；珍珠猪毛菜种群年龄结构在整体上为稳定型锥体，但局部表现为下降型锥体，种群开始衰败，静态生命曲线为正态分布型；红砂种群的年龄结构为下降型锥体，静态生命曲线残缺并有许多空白区，种群严重退化。[著者文摘]
英文摘要	The spatial and temporal trends of the community numbers of five dominant species in Minqin Liangucheng Nature Reserve were studied in terms of their importance values, distribution patterns, age structures, and static life curves. The results indicated that in the desert shrub communities, the dominant species or co-dominant species presented a much higher importance value than subdominant species did thereby playing a very important role in maintaining the structures and functions of the communities. There were a subdominant communities, i. e. Nitraria sphaerocarpa communities, which commonly existed in all the communities but Reaumuria soongorica community, and this indicated that Nitraria sphaerocarpa community, as an ancient community, had a wide ecological range and the other communities evolved from Nitraria sphaerocarpa community, the distribution patterns of the dominant communities depended up many factors such as biological characteristics and environmental conditions, which made Ephedra Przewalskii and Potaninia mongolica communities present a clump distribution and the other ones present a Poisson distribution. The dominant communities appeared to be diverse in age structure and static life curve. Ephedra Przewalskii, Caragana opulens and Oxytropis aciphylla communities, appearing to be a cone-shape of growth in age structure and a concave decline in static life cure, were stable communities; Potaninia mongolica community presented an inversed cone shape of growth in age structure and a back-di-agonal increase in static life curve, but its reproduction strategy determined it as a stable community; Salsola passerina community generally showed a stable cone shape of growth in age structure except partially appeared an inversed cone shape of growth thus beginning to decline, and it displayed a normal distribution in static life curve; Reaumuria soongorica community presented a inversed cone shape of growth in age structure and an incomplete shape if static life curve in many cases, which indicated that it highly degenerated.
中文关键词	连古城自然保护区 ; 优势种群 ; 分布格局 ; 种群结构 ; 静态生命曲线
英文关键词	Liangucheng Nature Reserve dominant communities distribution pattern community structure static life curve
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:2098143
来源机构	西北师范大学 ; 甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206781
作者单位	1.西北师范大学生命科学学院, 兰州, 甘肃 730000, 中国; 2.甘肃省治沙研究所, 武威, 甘肃 733000, 中国
推荐引用方式 GB/T 7714	李昌龙,马瑞君,王继和,等. 甘肃民勤连古城自然保护区优势种种群结构和动态研究[J]. 西北师范大学, 甘肃省治沙研究所,2005,25(8):1628-1636.
APA	李昌龙,马瑞君,王继和,李爱德,严子柱,&李得禄.(2005).甘肃民勤连古城自然保护区优势种种群结构和动态研究.西北植物学报,25(8),1628-1636.
MLA	李昌龙,et al."甘肃民勤连古城自然保护区优势种种群结构和动态研究".西北植物学报 25.8(2005):1628-1636.