GUO Shu-jiang,YANG Zi-hui,WANG Duo-ze,et al.Studies on Species Diversity and Spatial Distribution Pattern of Dominant Populations in the Transition Zone between Minqin Oasis and Desert[J].Research of Soil and Water Conservation,2011,18(03):92-96.
民勤绿洲一荒漠过渡带植物物种多样性及其优势种群空间分布格局研究
- Title:
- Studies on Species Diversity and Spatial Distribution Pattern of Dominant Populations in the Transition Zone between Minqin Oasis and Desert
- 分类号:
- Q145;X176
- 摘要:
- 以民勤绿洲-荒漠过渡带为研究对象，采用样方调查法，通过计算各类型区域内物种的重要值、丰富度指数（R）、Shannon-Winer指数（H’）、Simpson优势度指数（D）、物种均匀度指数（Jsw）、扩散系数（C）、负二项参数（K）、平均拥挤度（m*）、丛生指标（I）、聚块性指标（PI）、Green指数（GI）、Cassie指标（CA）、扩散性指数（Iδ），研究了绿洲-荒漠水平距离8km区域内的物种多样性及其优势种群的空间分布格局。结果表明：绿洲-荒漠过渡带优势种种群为沙拐枣、唐古特白刺、梭梭，伴生物种有刺沙蓬、雾冰藜、芦苇、沙蓬等。受生境和沙丘类型的影响，各种群均呈聚集分布格局，但聚集程度有一定差异性；物种多样性、丰富度随绿洲-荒漠梯度而呈规律性变化，总体表现为减小趋势。该区域生境和沙丘类型是民勤绿洲-荒漠过渡带物种多样性及种群分布格局的决定性因素。
- Abstract:
- With the transition zone between Minqin oasis and desert as subjects,using the quadrat survey procedure,species diversity and spatial distribution pattern of dominant populations in the transition zone between Minqin oasis and desert have been studied through testing species important value,abundance index(R),Shannon-Winer species diversity index(H’),Simpson dominance index(D),evenness indices(Jsw),diffusion coefficient(C),negative binomial parameter(K),mean crowding(m*),clumping index(I),patchiness index(PI),Green index(GI),Cassie index(CA),dispersal index(Iδ) in various types region.The results showed that the dominant species populations are Calligonum mongolicum,Nitraria tangutorum,Haloxylon ammodendron, and the companion species are Salsola ikonnikovⅡ,Bassia dasyphylla,Phragmites communis,griophyllum squarrosum. Suffering the influence of the sand dune type and the habitat,every population indicated the accumulation distribution pattern,but the accumulation degree had certain difference;The species diversity and the abundance changed regularly with gradient of Minqin oasis and desert,but overall performance showed tendency to ascend.The habitat and the type of sand dune in this region are a determining factor for species diversity and spatial distribution pattern of populations.
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备注/Memo
收稿日期:2010-10-29;改回日期:2010-12-2。
基金项目:国家自然科学基金项目（30960321，30872069）;国家公益性行业（林业）科研专项（200804031）
作者简介:郭树江（1984－），男，甘肃永昌人，助理工程师，主要从事荒漠化防治和生态定位观测研究。E-mail：shujguo@126.com