Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1038/ismej.2011.153 |
Response and resilience of soil biocrust bacterial communities to chronic physical disturbance in arid shrublands | |
Kuske, Cheryl R.1; Yeager, Chris M.1; Johnson, Shannon1; Ticknor, Lawrence O.2; Belnap, Jayne3 | |
通讯作者 | Kuske, Cheryl R. |
来源期刊 | ISME JOURNAL
![]() |
ISSN | 1751-7362 |
出版年 | 2012 |
卷号 | 6期号:4页码:886-897 |
英文摘要 | The impact of 10 years of annual foot trampling on soil biocrusts was examined in replicated field experiments at three cold desert sites of the Colorado Plateau, USA. Trampling detrimentally impacted lichens and mosses, and the keystone cyanobacterium, Microcoleus vaginatus, resulting in increased soil erosion and reduced C and N concentrations in surface soils. Trampled biocrusts contained approximately half as much extractable DNA and 20-52% less chlorophyll a when compared with intact biocrusts at each site. Two of the three sites also showed a decline in scytonemin-containing, diazotrophic cyanobacteria in trampled biocrusts. 16S rRNA gene sequence and terminal restriction fragment length polymorphism (T-RFLP) analyses of soil bacteria from untrampled and trampled biocrusts demonstrated a reduced proportion (23-65% reduction) of M. vaginatus and other Cyanobacteria in trampled plots. In parallel, other soil bacterial species that are natural residents of biocrusts, specifically members of the Actinobacteria, Chloroflexi and Bacteroidetes, became more readily detected in trampled than in untrampled biocrusts. Replicate 16S rRNA T-RFLP profiles from trampled biocrusts at all three sites contained significantly more fragments (n = 17) than those of untrampled biocrusts (n <= 6) and exhibited much higher variability among field replicates, indicating transition to an unstable disturbed state. Despite the dramatic negative impacts of trampling on biocrust physical structure and composition, M. vaginatus could still be detected in surface soils after 10 years of annual trampling, suggesting the potential for biocrust re-formation over time. Physical damage of biocrusts, in concert with changing temperature and precipitation patterns, has potential to alter performance of dryland ecosystems for decades. The ISME Journal (2012) 6, 886-897; doi: 10.1038/ismej.2011.153; published online 24 November 2011 |
英文关键词 | chlorophyll a cyanobacteria Microcoleus vaginatus soil biocrust scytonemin 16S rRNA |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000301945500017 |
WOS关键词 | GRASS BROMUS-TECTORUM ; COLORADO PLATEAU ; INNER-MONGOLIA ; CRUSTS ; DESERT ; DIVERSITY ; CHINA ; CYANOBACTERIA ; PRECIPITATION ; ALIGNMENTS |
WOS类目 | Ecology ; Microbiology |
WOS研究方向 | Environmental Sciences & Ecology ; Microbiology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/173058 |
作者单位 | 1.Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA; 2.Los Alamos Natl Lab, Computat & Comp Sci Div, Los Alamos, NM 87545 USA; 3.SW Biol Sci Ctr, Canyonlands Res Stn, Moab, UT USA |
推荐引用方式 GB/T 7714 | Kuske, Cheryl R.,Yeager, Chris M.,Johnson, Shannon,et al. Response and resilience of soil biocrust bacterial communities to chronic physical disturbance in arid shrublands[J],2012,6(4):886-897. |
APA | Kuske, Cheryl R.,Yeager, Chris M.,Johnson, Shannon,Ticknor, Lawrence O.,&Belnap, Jayne.(2012).Response and resilience of soil biocrust bacterial communities to chronic physical disturbance in arid shrublands.ISME JOURNAL,6(4),886-897. |
MLA | Kuske, Cheryl R.,et al."Response and resilience of soil biocrust bacterial communities to chronic physical disturbance in arid shrublands".ISME JOURNAL 6.4(2012):886-897. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。