干旱区生态环境知识资源中心(Arid): 珍稀植物银砂槐中国分布区的种群结构与动态分析

Arid

	珍稀植物银砂槐中国分布区的种群结构与动态分析
其他题名	Structure and Dynamics of China Rare Plant Ammodendron bifolium (Pall.) Yakovl Natural Population
	吕海英 1; 王孝安 1; 李进 2; 党千峰 2
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2014
卷号	34 期号:1 页码:177-183
中文摘要	通过对中国唯一银砂槐(Ammodendron bifolium)分布区新疆伊犁河谷地塔克尔莫乎尔沙漠狭窄区域的样地调查和数据统计分析,绘制了银砂槐自然种群的径级结构图，编制了种群的特定时间生命表，分析了存活曲线、死亡率曲线和寿命期望等重要参数，并运用时间序列模型预测种群数量动态。结果表明：（1)研究区内银砂槐种群结构中小径级个体较多，即I?Ⅲ径级占70.4% ，Ⅳ~ 径级占27. 62%，Ⅷ~ X径级仅占1. 98%，种群整体结构属于增长型，但I径级个体数少于II径级，种群的自然更新相对较差。（2)静态生命表分析结果表明，随着径级的增加银砂槐种群死亡率大致为上升趋势，且种群内基径超过3.5 cm(Ⅷ径级）的银砂槐数量迅速下降，即研究区内银砂槐基径越接近Ⅷ径级就越接近其生理寿命。（3)研究区内银砂槐的存活曲线基本接近Deevey III型，但I 径级存活数低于Ⅱ径级，Ⅱ径级后存活数量迅速下降，说明该种群幼苗补充量较少，自然更新受阻。（4)时间序列分析表明，随着时间推移，种群未来会呈现老龄个体增加的趋势。研究认为，新疆伊犁河谷地的银砂槐种群的生长发育主要受限于其自身的生物学特性和种内竞争，其种群的长期稳定维持较为困难，现有植株及生境斑块的妥善保护和适当的人工辅助措施是该区银砂槐种群恢复的关键。
英文摘要	Through a field investigation and data analysis to the only distribution area of Ammodendron bi-folium population in Takeermohuer Desert of the Ili River valley in Xinjiang,we aimed to learn the actuality of A. bi folium population, and forecast the future dynamics of A. bi folium population. In this research, the size structure，life tables，survival curve, mortality curve and life expectancy of A. bi folium population were studied and population dynamics were predicted by a time-sequence model. The results show that ： (1) The small-sized individual in A. bi folium population were more, namely the number of I ~ Ⅲ diameter individuals accounted for 70. 4 %, the number of IV?VII diameter individuals accounted for 27. 62 %, the number of Ⅷ?X diameter individuals accounted for only 1. 98%. Therefore, population structure, belongs to the growth type. However,the number of I diameter individuals was less than that of Ⅱ diameter individu-als, so that the natural regeneration of A. bifolium population was poor. (2) The static life table analysis show that A. bifolium population mortality was on a rising tendency, and the number of the individual; with diameter more than 3. 5 cm (VIII diameter) decreased rapidly with the increase of diameter grade,namely the individual closing to VIII diameter was more close to the physiological longevity, (3)The survival curve of A. bifolium population mainly belonged to Deevey III type in research area. The survival number of I diameter individuals was less than that of II diameter indiviuals, and the survival number after II diame-ter individuals decreased rapidly. It indicated that the population was lack of seedling transshipment anc natural regeneration was blocked. (4)Through time-sequence prediction,the population in the future woulc be more aging individuals. The studies suggest that A. bifolium population growth in the Ili River valley o Xinjiang was mainly limited to its biological characteristics and intraspecific competition. Thus, it was diffi cult for A. bifolium population to maintain the stability. As a result, the crucial factors for the natural re-generation and restoration of A, bifolium population in research aera are the protection of living individual: and their habitat and the revegetation by human.
中文关键词	银砂槐 ; 种群结构 ; 静态生命表 ; 存活曲线 ; 时间序列预测
英文关键词	Ammodendron bi folium population structure static life table survival curve time sequence a nalysis
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:5062059
来源机构	新疆师范大学 ; 陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231904
作者单位	1.陕西师范大学生命科学学院, 西安, 陕西 710062, 中国; 2.新疆师范大学生命科学学院, 乌鲁木齐, 新疆 830054, 中国
推荐引用方式 GB/T 7714	吕海英,王孝安,李进,等. 珍稀植物银砂槐中国分布区的种群结构与动态分析[J]. 新疆师范大学, 陕西师范大学,2014,34(1):177-183.
APA	吕海英,王孝安,李进,&党千峰.(2014).珍稀植物银砂槐中国分布区的种群结构与动态分析.西北植物学报,34(1),177-183.
MLA	吕海英,et al."珍稀植物银砂槐中国分布区的种群结构与动态分析".西北植物学报 34.1(2014):177-183.