不同生物气候区生物土壤结皮蓝藻物种多样性  

Cyanobacterial diversity of biological soil crusts in different bioclimatic regions in China

作　　者：闫沛迎 屈建军 杨自辉[1] 肖建华 唐进年[1] Yan Peiying;Qu Jianjun;Yang Zihui;Xiao Jianhua;Tang Jinnian(Minqin National Studies Station for Desert Steppe Ecosystem,Gansu Desert Control Research Institute,Lanzhou 730070,China;Dunhuang Gobi and Desert Ecology and Environment Research Station/Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]甘肃省治沙研究所民勤荒漠草地生态系统国家野外科学观测研究站,甘肃民勤730070 [2]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

出　　处：《中国沙漠》2022年第2期85-94,共10页Journal of Desert Research

基　　金：国家重点研发计划项目(2017YFC0504804);中国科学院沙漠与沙漠化重点实验室开放基金项目(KLDD-2019-007);甘肃省荒漠化与风沙灾害防治重点实验室开放基金项目(GSDC201904);甘肃省重点研发计划项目(21YF5FA037)。

摘　　要：丝状蓝藻作为荒漠区的先锋拓殖生物,在干旱半干旱的生物地球化学循环和生态修复过程中发挥着重要作用。本研究对3个不同生物气候区(民勤,大陆性荒漠气候;盐池,中温带大陆性气候;玛曲,高原大陆性气候)藻结皮中培养分离到的67株丝状蓝藻进行丝体的形态描述和16s rRNA分子鉴定。结果表明:67株丝状蓝藻隶属于颤藻目(Oscillatoriales)、聚球藻目(Synechococcales)和念珠藻目(Nostocales);3个生物气候区的蓝藻群落组成存在差异;具鞘微鞘藻(Microcoleus vaginatus)为3个不同生物气候区的共有藻;玛曲和民勤没有共有蓝藻属;微鞘藻属(Microcoleus)和颤藻属(Oscillatoria)是民勤和盐池的共有蓝藻属;玛曲和盐池只有Nodosilinea共有蓝藻属。在3个生物气候区的藻结皮中,只在玛曲培养分离到固氮蓝藻(Calothrix desertica),而在其他2个区未分离到。Filamentous cyanobacteria,as pioneer colonizers in desert areas,play an important role in the biogeochemical cycle and ecological restoration of arid and semi-arid areas.In this paper,sixty-seven filamentous cyanobacteria were isolated from the cyanobacterial crusts in three different bioclimatic regions.The results showed that sixty-seven filamentous cyanobacteria belonged to Oscillatorles,Siaynechococcales and Nostocale.The community compositions of cyanobacteria in the three bioclimatic regions were different.Microcoleus vaginatus was a common cyanobacterium in three different bioclimatic regions.There was no common cyanobacterium in Maqu and Minqin except Microcoleus vaginatus.Microcoleus and Oscillatoria were common cyanobacterial genera in Minqin and Yanchi.Only members of Nodosilinea were found in Maqu and Yanchi.Among the cyanobacterial crusts in three bioclimatic regions,Calothrix desertica was isolated only from Maqu,not from the other two regions.

关 键 词：丝状蓝藻 多样性 生物土壤结皮 生物气候区 

分 类 号：Q948.1[生物学—植物学]