Arid
DOI10.1016/j.ejsobi.2008.05.003
Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacan Desert, Mexico
Rodriguez-Zaraqoza, Saluador2; Gonzalez-Ruiz, Teresa2; Gonzalez-Lozano, Ernestina2; Lozada-Rojas, Abraham2; Mayzlish-Gati, Einav1; Steinberger, Yosef1
通讯作者Steinberger, Yosef
来源期刊EUROPEAN JOURNAL OF SOIL BIOLOGY
ISSN1164-5563
EISSN1778-3615
出版年2008
卷号44期号:4页码:373-380
英文摘要

Prosopis laevigata and Parkinsonia praecox are the most abundant perennial shrubs in the Tehuacan Desert, forming ’islands of fertility’ that dominate the alluvial terraces. Both species exhibit very similar phenology, with the timing of litter foliage being the only difference between them. P. praecox litter occurs shortly after the rains, while P. laevigata maintains its leaves until the next wet season. As degradable organic matter (OM) is one of the leading factors determining soil biota composition and activity, because of the OM provided by littering, we expected that the vertical distribution of the microbial community in the vicinity of the root zone of P. praecox would be higher in comparison to P. laevigata. One soil sampling was performed; during the rainy season in August, soil samples were collected from a 0-50-cm depth at 10-cm intervals, in the vicinity of the root canopy of four individual plants of each species and the interspaces between them. Soil moisture, organic matter, and counts of bacteria and fungi under shrubs were found to decrease from the upper to deeper layers. Respiratory activity was higher in the deeper layers (p < 0.01) in all three sampling sites. Total bacterial, fungal, and heterotrophic diazotrophs were found to be significantly (p < 0.001) more numerous under shrubs than in the interspace soil. No nitrogen-fixing bacteria were isolated from interplant soils in comparison to the soil samples collected beneath the shrubs. Heterotrophic diazotrophs significantly (p < 0.01) reduced more acetylene under P. praecox (29.0 nmol/g soil) than under P. laevigata (20.1 nmol/g soil). Although the microbial numbers were unaffected by differences in plant phenology, greater nitrogenase activity under P. praecox may influence nitrogen distribution in this and environment. Due to the fact that only one sampling was undertaken, this study elucidates the differences in the microbial community between the two shrubs, but the dynamics in the above community could not be shown. (C) 2008 Elsevier Masson SAS. All rights reserved.


英文关键词heterotrophic diazotrophs fertility islands Prosopis laevigata Parkinsonia praecox desert soil system soil microbial communities
类型Article
语种英语
国家Israel ; Mexico
收录类别SCI-E
WOS记录号WOS:000259374000003
WOS关键词NEGEV DESERT ; PHENOLOGICAL PATTERNS ; FUNCTIONAL DIVERSITY ; NEMATODE COMMUNITIES ; ZYGOPHYLLUM-DUMOSUM ; SPATIAL VARIATION ; SOIL ; ECOSYSTEM ; NITROGEN ; POPULATION
WOS类目Ecology ; Soil Science
WOS研究方向Environmental Sciences & Ecology ; Agriculture
来源机构Universidad Nacional Autónoma de México
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/157277
作者单位1.Bar Ilan Univ, Mina & Everard Goodman Fac Life Sci, IL-52900 Ramat Gan, Israel;
2.Univ Nacl Autonoma Mexico, Fac Estudios Super Iztacala, Unidad Biol Tecnol & Prototipos, Microbiol Lab, Tlalnepantla 54090, Estado Mexico, Mexico
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Rodriguez-Zaraqoza, Saluador,Gonzalez-Ruiz, Teresa,Gonzalez-Lozano, Ernestina,et al. Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacan Desert, Mexico[J]. Universidad Nacional Autónoma de México,2008,44(4):373-380.
APA Rodriguez-Zaraqoza, Saluador,Gonzalez-Ruiz, Teresa,Gonzalez-Lozano, Ernestina,Lozada-Rojas, Abraham,Mayzlish-Gati, Einav,&Steinberger, Yosef.(2008).Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacan Desert, Mexico.EUROPEAN JOURNAL OF SOIL BIOLOGY,44(4),373-380.
MLA Rodriguez-Zaraqoza, Saluador,et al."Vertical distribution of microbial communities under the canopy of two legume bushes in the Tehuacan Desert, Mexico".EUROPEAN JOURNAL OF SOIL BIOLOGY 44.4(2008):373-380.
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