Soil organic carbon and soil structure are driving microbial abundance and community composition across the arid and semi-arid grasslands in northern China

Hu, Yajun; Xiang, Dan; Veresoglou, Stavros D.; Chen, Falin; Chen, Yongliang; Hao, Zhipeng; Zhang, Xin; Chen, Baodong

doi:10.1016/j.soilbio.2014.06.014

Cited by 157 publications

(80 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Redundancy analysis showed that the observed variation between community structure was correlated with sediment attributes and environmental variations, such as conductivity, pH, point, potassium content and depth, the last two being the most significant ( Figure 1 and Table 2). Several studies support that pH and attributes related to soil acidity are the best predictors of the richness and diversity of microbial communities in soils [30][31][32][33]. In our work, the pH showed significant difference between 10 and 40 cm depth, which may contribute to the difference found in bacterial structure.…”

Section: Resultssupporting

confidence: 75%

Variations of Bacterial Community Structure and Composition in Mangrove Sediment at Different Depths in Southeastern Brazil

Mendes

Tsai

2014

Diversity

View full text Add to dashboard Cite

Tropical mangroves are considered one of the most productive ecosystems of the world, being characterized as nurseries and food sources for fish and other animals. Microorganisms play important roles in these environments, and the study of bacterial communities is of paramount importance for a better comprehension of mangrove dynamics. This study focused on the structure and composition of bacterial communities in mangrove sediments at different depths and points, located in Southeastern Brazil. Terminal Restriction Fragment Length Polymorphism (T-RFLP) was used to determine the community structure, and 16S rRNA gene pyrosequencing was used to characterize the community composition. Redundancy analysis of T-RFLP patterns revealed differences in bacterial community structure according to soil attributes and depth. The parameters K and depth presented significant correlation with general community structure. Most sequences were classified into the phylum Proteobacteria (88%), which presented differences according to the depth, where the classes Betaproteobacteria (21%) and Deltaproteobacteria (16%) were abundant at 10 cm and Epsilonproteobacteria (35%) was abundant at 40 cm depth. Clear differences were observed in community composition as shown by the differential distribution of the phyla Firmicutes (1.13% and 3.8%, for 10 cm and 40 cm respectively), Chloroflexi (2.8% and 0.75%), and Acidobacteria (2.75% and 0.57%) according to the depth. Bacterial diversity measurements indicated higher diversity in shallow samples. Taken together, our findings indicate that mangrove holds a diverse bacterial community, which is shaped by the variations found in the ecosystem, such as sediment properties and depth.

show abstract

Section: Resultssupporting

confidence: 75%

Variations of Bacterial Community Structure and Composition in Mangrove Sediment at Different Depths in Southeastern Brazil

Mendes

Tsai

2014

Diversity

View full text Add to dashboard Cite

show abstract

“…1). The idea that microbial biomass provides an early indication of changes in SOC was postulated already by Powlson et al (1987) and also confirmed by several other studies (Johnson et al 2003;Djukic et al 2010;Vries et al 2012;Hu et al 2014). Our presumption that MT leads to higher SOC content in comparison to CT in the upper 0-10-cm soil layer also at our experimental site was confirmed recently, 3.5 years after samples were taken for this study, thereby demonstrating that changes in SOC are slow (Table S4).…”

Section: Dynamics Of Soil Organic Mattersupporting

confidence: 67%

“…Not surprisingly, many studies have been performed in the past to determine environmental parameters, which steer the composition and function of the soil microbiome. These studies indicate that the most influential factors are parent material (Ulrich and Becker 2006), soil type (Cavigelli et al 2005), pH (Wakelin et al 2008;Griffiths et al 2011), soil water content and temperature (Brockett et al 2012;Pietikainen et al 2005), as well as C quality and availability (Drenovsky et al 2004;Hu et al 2014). However, most existing data linked to the potential soil biodiversity losses has been acquired by comparing highly different land use systems, such as grassland vs. arable land, while more subtle intervening factors such as type of fertilizer, pesticide, tillage system and related interactive effects are still not fully understood (Thiele-Bruhn et al 2012;Huang et al 2013;Shi et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Consequences of minimum soil tillage on abiotic soil properties and composition of microbial communities in a shallow Cambisol originated from fluvioglacial deposits

et al. 2015

View full text Add to dashboard Cite

A long-term field experiment was run for 12 years to evaluate the impact of minimum tillage (MT) compared to conventional mouldboard ploughing (CT) on soil chemical, physical and microbial properties in a shallow Cambisol formed over fluvioglacial deposits of Drava river in Slovenia. Significant differences between MT and CT were found in vertical distribution of soil organic C (SOC) and nutrients (total N and plant available potassium); under MT, concentrations decreased from the soil surface to the lower layers, as opposed to CT which maintained rather uniform distribution down to the ploughing depth. MT in comparison with CT also increased the proportion of water-stable 2-4-mm-sized aggregates (80.9 and 61.3 %, respectively), water holding capacity (24.8 and 22.2 %, respectively) and plant available water (13.4 and 10.3 %, respectively) in the upper 0-10-cm soil layer. Bulk density, porosity, the proportion of water-stable 1-2-mm-sized aggregates and infiltration rate showed no significant differences between the tillage treatments. SOC content in the upper 0-10-cm soil layer was not significantly different between MT and CT (1.60±0.07 and 1.45±0.05 %, respectively), as well as the overall stock in the investigated soil profile (0-60 cm) remained unaffected (57.4± 0.8 and 59.1± 2.2 t ha −1 , respectively). Microbial biomass, estimated by the total soil DNA, was higher in MT than CT in the 0-10-cm layer. Furthermore, a positive linear dependence of microbial biomass on SOC content was observed. Fingerprinting of bacterial, fungal and archaeal communities indicated that microbial community composition changed by long-term MT, whereas changes in microbial diversity were not detected for any domain. The most pronounced shifts in the composition were found for bacterial communities in the 10-20-cm layer, while the composition of fungal communities slightly changed in the upper 0-10 cm of MT soil. The composition of archaeal communities was not affected by the tillage or by the soil depth. Our results indicate that MT generates modest changes in soil structure and soil water retention properties and could support measures against erosion, drought and nutrient leaching. Considering increased microbial biomass in the topsoil of MT and shifts in microbial diversity, the impacts of MT on soil microbiome are also evident and need to be further investigated to identify the affected functional traits.

show abstract

“…First, previous studies mainly targeted temperate grasslands (Drenovsky et al, 2010;de Vries et al, 2012;Chen et al, 2014aChen et al, , 2015Hu et al, 2014;Ma et al, 2015). First, previous studies mainly targeted temperate grasslands (Drenovsky et al, 2010;de Vries et al, 2012;Chen et al, 2014aChen et al, , 2015Hu et al, 2014;Ma et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…Alpine grasslands on the Tibetan Plateau are high-latitude ecosystems that store a large amount of soil organic carbon (SOC) because the low temperature limits microbial decomposition (Yang et al, 2008). The SOC content is universally considered to be a key factor regulating soil microbial communities because it provides C for microbial growth Hu et al, 2014). The biophysical process that determines SOC accumulation in alpine grasslands differs from the controlling processes of other ecosystems in that increasing temperature significantly increases the SOC density (C amount per area), because the temperature-induced vegetation productivity increase exceeds the microbial decomposition increase (Yang et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Patterns and drivers of soil microbial communities in Tibetan alpine and global terrestrial ecosystems

Chen

Ding

Peng

et al. 2016

Journal of Biogeography

103

View full text Add to dashboard Cite

Aim Soil microorganisms play key roles in regulating many important ecosystem processes. However, our understanding of the patterns and drivers of soil microbial communities remains limited. This study aims to test the hypothesis that edaphic factors are more important in explaining variations in soil microbial communities than climatic and biotic factors, as soils directly provide substrates and environment for soil microbial communities. Location Tibetan alpine grasslands and global terrestrial biomes. Methods On the basis of phospholipid fatty acid (PLFA) analysis, we investigated large‐scale patterns and drivers of soil microbial communities using data obtained from 196 sites within two major grassland types (alpine steppe and alpine meadow) on the Tibetan Plateau. We also explored global patterns of soil microbial communities by analysing published data from around the world. Results Soil microbial PLFAs in Tibetan alpine grasslands were positively associated with mean annual temperature and mean annual precipitation (MAP), contradicting patterns previously observed across global biomes. A combined stepwise regression and variation partitioning analysis revealed that soil microbial community variations in Tibetan alpine grasslands were mainly explained by edaphic factors, such as soil organic carbon, C : N ratio, pH and soil texture, then by biotic factors, such as aboveground biomass and plant species richness, and further by climatic factors, such as MAP. The global analysis confirmed that edaphic factors accounted for a greater portion of the variation in soil microbial communities than did climatic and biotic variables. Main conclusions These results provide strong support for the hypothesis that edaphic factors are the dominant drivers of spatial variations in soil microbial communities across regional and global scales.

show abstract

Soil organic carbon and soil structure are driving microbial abundance and community composition across the arid and semi-arid grasslands in northern China

Cited by 157 publications

References 57 publications

Variations of Bacterial Community Structure and Composition in Mangrove Sediment at Different Depths in Southeastern Brazil

Variations of Bacterial Community Structure and Composition in Mangrove Sediment at Different Depths in Southeastern Brazil

Consequences of minimum soil tillage on abiotic soil properties and composition of microbial communities in a shallow Cambisol originated from fluvioglacial deposits

Patterns and drivers of soil microbial communities in Tibetan alpine and global terrestrial ecosystems

Contact Info

Product

Resources

About