塔里木河下游胡杨群落特征及种群结构分析

摘要/Abstract

摘要： 采用样方调查法对塔里木河下游31团、库孜来克、英苏、喀尔达依、阿拉干及依干不及麻断面河岸胡杨群落特征及胡杨种群结构进行了研究。结果表明:①塔里木河下游河岸胡杨群落物种组成简单,共发现12种植物,分属10科12属,其中乔木1种,灌木和草本植分别为4种和7种。六断面胡杨群落物种数分别为9、8、4、5、4和2种, 其中共有种为胡杨和多枝柽柳。②下游胡杨群落物种多样性指数较低,31团至依干不及麻断面Simpson指数和Shanon-wiener指数呈下降趋势。③下游胡杨种群平均密度为606 ind·hm-1,平均胸高断面积为20.01 m2·hm-1。胡杨种群胸径以7.5～32.5 cm个体为主,小于7.5 cm及大于32.5 cm个体较少,种群呈现为两端小中间大的结构。④输水能促进胡杨种群的更新,并主要以根蘖形式出现。

关键词: 胡杨群落, 种群结构, 输水, 生物多样性指数, 塔里木河下游

Abstract: The community characteristics and the population structure of Populus euphratica Oliv along 6 sections in lower reaches of Tarim River, including No.31-Regiment, Kuzilaike, Yinsu, Kaerdayi, Alakan, Yikanbujima, were studied with the method of quadrats investigation. The results showed that: (1) The species composition of P. euphratica communities was simple and there were 12 species belonging to 12 genera of 10 families. The arbor, shrub and herbage types was 1, 4 and 7, respectively. The number of P. euphratica species in the six sections were 9, 8, 4, 5, 4 and 2, respectively and the common species in the six sections were Populus euphratica and Tamarix ralnosissima. (2) The species diversity indices of P. euphratica communities were lower in the lower reaches and the Simpson index and Shanon-wiener index presented downward trend from No.31-Regiment to Yikanbujima section. (3) The average density of the P. euphratica populations was 606 ind·hm-2 and the average basal area was 20.01 m2·hm-2. The diameter at breast height of most P. euphratica populations was 7.5 to 32.5 cm, while that of under 7.5 cm and over 32.5 cm were few, so the species showed a spindle-shape structure in the lower reaches of Tarim River. (4) The water delivery has promoted the renewing of Populus euphratica populations, with the growing up of the shoots as the main form.

Key words: Populus euphratica Oliv communities, populations structure, water delivery, species diversity indices, lower reaches of Tarim River

中图分类号:

Q948.15

邓潮洲;;张希明*;李利;吴俊侠;朱军涛;刘国军;吕朝燕;. 塔里木河下游胡杨群落特征及种群结构分析[J]. 中国沙漠, 2010, 30(3): 589-595.

DENG Chao-zhou;;ZHANG Xi-ming;LI Li;WU Jun-xia;ZHU Jun-tao;LIANG Shao-min;L Chao-yan;. Community Characteristics and Population Structure of Populus Euphratica Oliv in Lower Reaches of Tarim River[J]. JOURNAL OF DESERT RESEARCH, 2010, 30(3): 589-595.

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