Arid
DOI10.1038/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
ISSN1751-7362
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。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Kuske, Cheryl R.]的文章
[Yeager, Chris M.]的文章
[Johnson, Shannon]的文章
百度学术
百度学术中相似的文章
[Kuske, Cheryl R.]的文章
[Yeager, Chris M.]的文章
[Johnson, Shannon]的文章
必应学术
必应学术中相似的文章
[Kuske, Cheryl R.]的文章
[Yeager, Chris M.]的文章
[Johnson, Shannon]的文章
相关权益政策
暂无数据
收藏/分享

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。