Biomass and Community Structure of Cyanobacteria in Shapotou Sand Fixation Area

YAN Peiying; QU Jianjun; XIAO Jianhua

doi:10.13961/j.cnki.stbctb.2017.06.012

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Biomass and Community Structure of Cyanobacteria in Shapotou Sand Fixation Area

- Biomass and Community Structure of Cyanobacteria in Shapotou Sand Fixation Area
- Bulletin of Soiland Water Conservation Vol. 37, Issue 6, Pages: 75-79(2017)
- 作者机构：
  
  中国科学院西北生态环境资源研究院敦煌戈壁荒漠生态与环境研究站/沙漠与沙漠化重点实验室,甘肃,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.06.012
  CLC：
- Published：2017
- 稿件说明：
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YAN Peiying, QU Jianjun, XIAO Jianhua. Biomass and Community Structure of Cyanobacteria in Shapotou Sand Fixation Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 75-79.
DOI：

YAN Peiying, QU Jianjun, XIAO Jianhua. Biomass and Community Structure of Cyanobacteria in Shapotou Sand Fixation Area[J]. Bulletin of Soiland Water Conservation, 2017, 37(6): 75-79. DOI： 10.13961/j.cnki.stbctb.2017.06.012.

摘要

[目的

]

揭示不同沙生灌木不同栽植年限根部和尼龙网格内表层的蓝藻生物量和群落结构特征，阐明蓝藻在不同沙生灌木根部和尼龙网格内表层的定殖情况。[方法

]

用显微镜计数法和体积换算法测得蓝藻的生物量；根据蓝藻种的形态、结构、大小等特点，利用《中国淡水藻类》、《中国淡水藻志》等参考书将其鉴定到种。[结果

]

① 3种沙生灌木不同栽植年限根部和尼龙网格内表层的生物量不同。1956年花棒根部的蓝藻个体数量最高（9.84×10

个/g），而1981年花棒和1987年油蒿的最低（3.16×10

个/g）；1964年油蒿根部的蓝藻平均总体积最大（1.04×10

μm

/g），而1964年柠条的最低（6.00×10

μm

/g）；1987年油蒿根部的丝状蓝藻百分比最高（98.4%），而尼龙网格内表层的最低（38.75%）；② 3种沙生灌木不同栽植年限根部和尼龙网格内表层的群落结构不同。共分离出25种蓝藻，属于色球藻目、颤藻目和念珠藻目。其中，巨颤藻最常见，且分离出点型念珠藻、嫩柔微毛藻和线形眉藻3种固氮蓝藻。[结论

]

3种沙生灌木根部的蓝藻生物量高，种类丰富，说明这3种沙生灌木根部是蓝藻定殖与繁衍的有利场所。

Abstract

[Objective] This study aimed to reveal cyanobacterial biomass and community structure within shielding nylon mesh in different shrub roots with different plantation ages and within shielding nylon mesh

and to clarify the colonized states of cyanobacteria in different shrub roots and within nylon mesh.[Methods] Biomass of cyanobacteria were measured by counting and volume conversion with microscope and these cyanobacteria were identified according to their morphology

structure

size and other characteristics with toxomony book "freshwater algae of China" and so on.[Results] Number of cyanobacteria was as the highest as 9.84×108 cell/g in the root of Hedysarum scoparium which was planted in 1956

and were the lowest(3.16×108 cells/g) in the root of Hedysarum scoparium planted in 1981 and in the root of Artemisia ordosic planted in 1987. Average total volume of cyanobacteria was the highest(1.04×1013 μm3/g) in the root of Artemisia ordosic planted in 1964

and the lowest(6.00×1011 μm3/g) in the root of Carnage intermedia planted in 1964. The percentage of filamentous cyanobacteria was the highest(98.4%) in the root of Artemisia ordosic planted in 1987

and the lowest(38.75%) within nylon mesh. Totally 25 cyanobacteria

mainly belonging to Chroococcales

Oscillatoriales and Nostocales

were found. Among them

Oscillatoria princeps is the most dominant cyanobacteria

and Nostoc punctiforme

Microchatetenera thuret and Calothrix linearis were recognized.[Conclusion] Cyanobacterial biomass and their diversity of three kinds of shrub roots were found higher

probably their rhizosphere habitats are favorable for cyanobacterial colonization and reproduction.

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Keywords

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