Examination of biotic and abiotic controls of soil bacterial diversity under perennial shrubs in xeric soils

Berg, Naama; Unc, Adrian; Steinberger, Yosef

doi:10.1016/j.catena.2014.12.029

Cited by 12 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We employed common molecular PCR‐DGGE community fingerprints for determining bacterial community composition (Berg et al, ). A different fingerprinting method (Bachar et al, ; Ewing et al, ), phospholipid fatty acid analysis (Ben‐David et al, ), and sequencing of clones (Saul‐Tcherkas & Steinberger, ) were used for studying arid environments.…”

Section: Discussionmentioning

confidence: 99%

“…The interactions of the flora with soil components, weather, and nutrients in the RIs has been studied before (Carrillo‐Garcia et al, ; Reyes‐Reyes et al, ; Reynolds, Virginia, Kemp, de Soyza, & Tremmel, ; Schade & Hobbie, ; Schlesinger et al, ), and the dominant influence was the accumulation of organic matter under the canopy of the tree, which this study also shows. Although the mechanisms whereby the flora interacts with the microbial community have been examined (Bachar et al, ; Berg, Unc, & Steinberger, ; Ewing, Southard, Macalady, Hartshorn, & Johnson, ; Herman et al, ; Jia, Liu, Wang, & Zhang, ; Saul‐Tcherkas & Steinberger, ; Yu & Steinberger, ), the functional aspects of these interactions have not been evaluated in extensive detail. This study explored these interactions.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Functional metabolic diversity of the bacterial community in undisturbed resource island soils in the southern Sonoran Desert

Garcia¹,

Lopez²,

de‐Bashan

et al. 2018

Land Degrad Dev

View full text Add to dashboard Cite

Resource islands (RIs), a natural revegetation phenomenon in arid lands, consist of a single nurse tree or few large shrubs and numerous understory nurslings. We analyzed 18 individual mesquite RIs for plant diversity and richness, area, trunk diameter (reflecting age), soil characteristics, physiological functionality of microbial populations, and interactions among these variables. Nursing Capacity reflected the availability of habitat and was positively correlated to plant richness, but not to plant diversity. No relationship between plant diversity and bacterial diversity was found. The structure of the bacterial communities of RIs differed from the bacterial communities of bare areas, which showed greater richness and diversity compared with those of RIs. The Nursing Capacity of the RIs was related to plant richness and accompanied by variations in soil properties. A high correlation was found by substrate utilization analysis between metabolic parameters of bacteria and diversity and richness of plants in the RIs. RI bacterial communities were more metabolically active and could degrade different carbon sources than bare area communities. RI bacterial communities contained species with greater capability to metabolize diverse carbon substrates in soil with more organic matter. Bacteria from low, medium, and high plant diversity areas were cultured and found to belong to four bacterial families. This study demonstrates that numerous parameters interact, but not every parameter significantly affected bacterial activity in the RI.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Functional metabolic diversity of the bacterial community in undisturbed resource island soils in the southern Sonoran Desert

Garcia¹,

Lopez²,

de‐Bashan

et al. 2018

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

“…Studies of natural bacterial community structure in several arid zones were documented in Mexico (Aguirre‐Garrido et al, ), the Negev Desert (Ben‐David, Zaady, Sher, & Nejidat, ; Berg, Unc, & Steinberger, ; Kaplan et al, ), and the Mojave Desert, USA (Ewing, Southard, Macalady, Hartshorn, & Johnson, ). However, restoration attempts often alter bacterial populations and reveal completely different patterns (Chen et al, ), which had happened in degraded soil or mine tailings in southeast Spain (Carrasco et al, ; García, Roldán, & Hernández, ), in Brazil (Araújo, Borges, Tsai, Cesarz, & Eisenhauer, ), and in China (Zhang, Cao, Han, & Jiang, ).…”

Section: Discussionmentioning

confidence: 99%

Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Galaviz¹,

Lopez²,

de‐Bashan

et al. 2018

Land Degrad Dev

View full text Add to dashboard Cite

Soil degradation is an ecological disturbance, usually human‐caused, that negatively affects the vegetation and climate of an ecosystem, particularly arid and semiarid environments. These degraded soils can be restored by using native perennial plants inoculated with specific microorganisms. We studied the changes in root growth and the rhizosphere bacterial community of mesquite seedlings (Prosopis articulata) after inoculation with the endophytic bacteria Bacillus pumilus ES4, over 3 cycles of growth in the same soil under desert climatic conditions, and found that inoculation significantly enhanced root biomass during the growth cycles but not shoot biomass or root and shoot lengths. Fluorescent in situ hybridization analysis demonstrated that B. pumilus colonized the root cap, apical meristem, and elongation zone, forming small colonies, on roots from soil‐grown mesquite. Inoculation also significantly changed the bacterial community structure of rhizophere and nonrhizosphere (without plants) soils based on denaturing gradient gel electrophoresis profiles. The changes were highly stable, and the bacterial community structure was maintained throughout the experimental period and not affected by plant replacement. The 16S rRNA pyrosequencing confirmed the changes on structure of bacterial community and revealed an impact on the top taxonomic levels analyzed. The rhizospheres of inoculated plants showed a significant increase in the abundance of Proteobacteria and Acidobacteria coupled with a concomitant decrease in Actinobacteria, whereas an opposite response was observed in nonrhizospheric degraded soils. Overall, inoculation with B. pumilus reduced bacterial diversity but increased the Rhizobium population in the soil. The class Bacilli, despite B. pumilus inoculum, showed minimal variation.

show abstract

“…The distribution of arid soil microbial communities was correlated with the sparse shrub vegetation in numerous studies (reviewed in Bashan and de Bashan 2010). In the Negev (Saul-Tcherkas and Steinberger 2011; Yu and Steinberger 2011;Berg et al 2015) and Chihuahuan (Herman et al 1995) Deserts, bacterial diversities in barren and intra-canopy patches were significantly different. In the arid lands of Australia, plantcovered patches of soil exhibited an increase in the abundance and richness of protozoan communities (Robinson et al 2002), Similarly, in the semiarid environments of Mexico (Camargo-Ricalde and Dhillion 2003) and Chile (Aguilera et al 2016), one particular population of fungi was closely associated with the presence of plants, whereas another was detected in barren soil (Steven et al 2014a).…”

Section: Introductionmentioning

confidence: 99%

Perennials but not slope aspect affect the diversity of soil bacterial communities in the northern Negev Desert, Israel

et al. 2018

View full text Add to dashboard Cite

Underneath the canopy of perennials in arid regions, moderate soil temperature and evaporation, as well as plant litter create islands of higher fertility in the low-productivity landscape, known as ‘resource islands’. The sparse distribution of these resource islands is mirrored by soil microbial communities, which mediate a large number of biogeochemical transformations underneath the plants. We explored the link between the bacterial community composition and two prevalent desert shrubs, Zygophyllum dumosum and Artemisia herba-alba, on northern- and southern-facing slopes in the northern highlands of the Negev Desert (Israel), at the end of a drought winter mild rainy season. We sequenced the bacterial community and analysed the physicochemical properties of the soil under the shrub canopies and from barren soil in replicate slopes. The soil bacterial diversity was independent of slope aspect, but differed according to shrub presence or type. Links between soil bacterial community composition and their associated desert shrubs were found, enabling us to link bacterial diversity with shrub type or barren soils. Our results suggest that plants and their associated bacterial communities are connected to survival and persistence under the harsh desert conditions.

show abstract

Examination of biotic and abiotic controls of soil bacterial diversity under perennial shrubs in xeric soils

Cited by 12 publications

References 36 publications

Functional metabolic diversity of the bacterial community in undisturbed resource island soils in the southern Sonoran Desert

Functional metabolic diversity of the bacterial community in undisturbed resource island soils in the southern Sonoran Desert

Root growth improvement of mesquite seedlings and bacterial rhizosphere and soil community changes are induced by inoculation with plant growth‐promoting bacteria and promote restoration of eroded desert soil

Perennials but not slope aspect affect the diversity of soil bacterial communities in the northern Negev Desert, Israel

Contact Info

Product

Resources

About