Arid
DOI10.1016/j.jaridenv.2015.09.012
Sheep grazing and soil bacterial diversity in shrublands of the Patagonian Monte, Argentina
Olivera, Nelda L.1; Prieto, Luciano1; Bertiller, Monica B.1,2; Ferrero, Marcela A.3
通讯作者Olivera, Nelda L.
来源期刊JOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
EISSN1095-922X
出版年2016
卷号125页码:16-20
英文摘要

Our objective was to assess whether long-term continuous sheep grazing was associated with the bacterial community of the Patagonian Monte soils. We randomly extracted soil samples from 5 plant-covered patches (PCP) and the nearest inter-canopy areas (IC) at sites with low (L), moderate (M) and heavy (H) grazing intensity. Bacterial communities were evaluated by denaturing gradient gel electrophoresis (DGGE) and dominant bands were sequenced. Dendrograms showed a different association among grazing sites in PCP compared to IC areas. In PCP, M and H sites were clustered and DGGE revealed a high similarity in the bacterial community regardless of grazing intensity. In IC areas, analyses clustered L and M sites. Band sequencing revealed that members of these communities belonged to Sphingobacteria, Solibacteres, Gammaproteobacteria, Betaproteobacteria and Bacilli. Some of the band sequences related to Nitrosococcus oceani and Nitrosococcus watsonii which are restricted to marine environments and salt lakes. Microcoleus vaginatus and diatom chloroplast-related sequences were mainly detected in IC areas from L and M. Heavy grazing could alter autotrophic bacteria/diatom composition in IC areas possibly due to physical disturbance of biological crusts by trampling, threatening the potential of crust re-formation. Grazing intensity affected soil bacterial communities differently in PCP and IC areas with soil crust, highlighting the importance of improving our understanding of microbial diversity responses to land use. (C) 2015 Elsevier Ltd. All rights reserved.


英文关键词Arid ecosystems Grazing Bacteria Patagonia
类型Article
语种英语
国家Argentina
收录类别SCI-E
WOS记录号WOS:000366773000003
WOS关键词16S RIBOSOMAL-RNA ; COMMUNITIES ; HISTORY ; CRUSTS
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/194075
作者单位1.Consejo Nacl Invest Cient & Tecn, Ctr Nacl Patagon CENPAT, Chubut, Argentina;
2.Univ Nacl Patagonia San Juan Bosco, Puerto Madryn, Chubut, Argentina;
3.Consejo Nacl Invest Cient & Tecn, Planta Photo Proc Ind Microbiol PROIMI, San Miguel De Tucuman, Tucuman, Argentina
推荐引用方式
GB/T 7714
Olivera, Nelda L.,Prieto, Luciano,Bertiller, Monica B.,et al. Sheep grazing and soil bacterial diversity in shrublands of the Patagonian Monte, Argentina[J],2016,125:16-20.
APA Olivera, Nelda L.,Prieto, Luciano,Bertiller, Monica B.,&Ferrero, Marcela A..(2016).Sheep grazing and soil bacterial diversity in shrublands of the Patagonian Monte, Argentina.JOURNAL OF ARID ENVIRONMENTS,125,16-20.
MLA Olivera, Nelda L.,et al."Sheep grazing and soil bacterial diversity in shrublands of the Patagonian Monte, Argentina".JOURNAL OF ARID ENVIRONMENTS 125(2016):16-20.
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