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1. Bacterial mobility facilitated by soil depth and intact structure

Author:
Jing Chen; Liqiong Yang; Xijuan Chen; Steven Ripp; Mark Radosevich; Jie Zhuang
Source:
Soil & tillage research 2021 v.209 pp. 104911
ISSN:
0167-1987
Subject:
soil depth,   etc   ; Escherichia coli; macropores; research; saturated flow; sewage; soil organic matter; tillage; wastewater; zeta potential;     Show all 10 Subjects
Abstract:
... Pathogenic bacteria, widely present in septic tanks, sewage sludges, and wastewater, can move through the subsurface environment to pollute drinking water. Bacterial transport behaviors vary with soil properties and are subject to soil pore networking. In this study, we investigated the transport of Escherichia coli 652T7 through intact and disturbed soils collected from different soil depths (0 ...
DOI:
10.1016/j.still.2020.104911

2. Divergent vertical distributions of microbial biomass with soil depth among groups and land uses

Author:
Tingting Sun; Yugang Wang; Manuel Esteban Lucas-Borja; Xin Jing; Wenting Feng
Source:
Journal of environmental management 2021 v.292 pp. 112755
ISSN:
0301-4797
Subject:
soil depth,   etc   ; clay fraction; climate; environmental management; fungal biomass; prediction; soil fungi; soil organic carbon; soil profiles; spatial distribution;     Show all 10 Subjects
Abstract:
... Soil microbial biomass is key to improving the prediction of soil organic carbon (SOC) dynamics by modeling. However, the driving mechanism of microbial biomass of different groups with soil depth is poorly understood across sites. Here, we compiled the biomass of different microbial groups (i.e., fungi, bacteria, gram-positive bacteria G⁺, and gram-negative bacteria G⁻) from the surface ...
DOI:
10.1016/j.jenvman.2021.112755

3. An experimental investigation of the effects of thawed soil depth on rill flow velocity

Author:
Xiaofeng Gao; Xiaonan Shi; Tingwu Lei; Huaqing Liu; Jiahui Yang
Source:
Hydrological processes 2021 v.35 no.2 pp. e14043
ISSN:
0885-6087
Subject:
soil depth,   etc   ; altitude; cold; electrolytes; energy; meadow soils; rain; rain intensity; rainfall simulation; runoff; sediment transport; soil erosion; surface roughness; water flow;     Show all 14 Subjects
Abstract:
... method was used to measure rill flow velocity along a meadow soil slope at different thaw depths under simulated rainfall. Rill flow velocity was measured using four thawed soil depths (0, 1, 2 and 10 cm), four slope gradients (5°, 10°, 15° and 20°) and four rainfall intensities (30, 60, 90 and 120 mm·h⁻¹). The results showed that the increase in thawed soil depth caused a decrease in rill flow ...
DOI:
10.1002/hyp.14043

4. Modeling Root Exudate Accumulation Gradients to Estimate Net Exudation Rates by Peatland Soil Depth

Author:
Cameron Proctor; Yuhong He
Source:
Plants 2021 v.10 no.1 pp. -
ISSN:
2223-7747
Subject:
soil depth,   etc   ; amino acids; depth; diffusion; ecosystems; exudation; glucose; methanogens; mineralization; models; peatlands; rhizoplane; root exudates; soil properties; solutes; sorption; variability;     Show all 17 Subjects
Abstract:
... was 1.23 times higher. Root influx of glucose increased from 1.431 to 1.758 nmol cm⁻¹ hr⁻¹, representing a recapture efficiency gain of 15.74% (i.e., 69.06% versus 84.8%). Driven by increased root influx, overall net exudation rates of select sugars and amino acids varied by a factor two. Model sensitivity analysis revealed that soil depth and root influx capability are key determinants of the rhizoplane ...
DOI:
10.3390/plants10010106

5. Pyrolysis temperature and soil depth interactions determine PyC turnover and induced soil organic carbon priming

Author:
Fernanda Santos; David M. Rice; Jeffrey A. Bird; Asmeret Asefaw Berhe
Source:
Biogeochemistry 2021 v.153 no.1 pp. 47-65
ISSN:
0168-2563
Subject:
soil depth,   etc   ; Pinus banksiana; biogeochemistry; biomass; field capacity; forest soils; forests; mineralization; pyrolysis; soil organic carbon; soil water; subsurface soil layers; temperature; wood;     Show all 14 Subjects
Abstract:
... Pyrogenic organic carbon (PyC) is a complex, heterogeneous class of thermally altered organic substrates, but its dynamics and how its behavior changes with soil depth remain poorly understood. We conducted a laboratory incubation study to investigate the interactive effects of pyrolysis temperature and soil depth on the turnover of PyC compared to its precursor wood and native SOC (NSOC). We ...
DOI:
10.1007/s10533-021-00767-x

6. Soil microbial community variation with time and soil depth in Eurasian Steppe (Inner Mongolia, China)

Author:
Hongbin Zhao; Wenling Zheng; Shengwei Zhang; Wenlong Gao; Yueyue Fan
Source:
Annals of microbiology 2021 v.71 no.1 pp. 21
ISSN:
1590-4261
Subject:
soil depth,   etc   ; Acidobacteria; Actinobacteria; Ascomycota; Basidiomycota; Proteobacteria; community structure; energy; fungi; nitrogen; soil organic matter; soil pH; soil temperature; soil water content; spatial variation; steppes; total organic carbon; China;     Show all 18 Subjects
Abstract:
... PURPOSE: Soil microorganisms play an indispensable role in the material and energy cycle of grassland ecosystems. The abundance of these organisms vary according to environmental factors, such as time of year and soil depth. There have been few studies on the transformation of soil microbial communities in degraded typical steppe according to these temporal and spatial changes. In this study, we ...
DOI:
10.1186/s13213-021-01633-9

7. Variations in soil organic carbon content with chronosequence, soil depth and aggregate size under shifting cultivation

Author:
Sabina Yasmin Laskar; Gudeta Weldesemayat Sileshi; Karabi Pathak; Nirmal Debnath; Arun Jyoti Nath; Kaynath Yasmin Laskar; Pator Singnar; Ashesh Kumar Das
Source:
Science of the total environment 2021 v.762 pp. 143114
ISSN:
0048-9697
Subject:
soil depth,   etc   ; Acrisols; aggregate stability; agricultural land; bulk density; chronosequences; deforestation; environment; forest land; forests; land use; multivariate analysis; porosity; soil compaction; soil density; soil organic carbon; India;     Show all 17 Subjects
Abstract:
... Acrisols), which are prone to rapid degradation with cultivation. The shortened fallow cycle as practised currently is ecologically unsustainable and economically not viable. This study aimed to quantify (i) changes in soil bulk density, aggregate stability and compaction in relation to chronosequence and soil depth, (ii) changes in the proportion of macro, meso, and micro aggregates and associated soil ...
DOI:
10.1016/j.scitotenv.2020.143114

8. Soil depth prediction by digital soil mapping and its impact in pine forestry productivity in South Brazil

Author:
Taciara Zborowski Horst-Heinen; Ricardo Simão Diniz Dalmolin; Alexandre ten Caten; Jean Michel Moura-Bueno; Sabine Grunwald; Fabrício de Araújo Pedron; Miriam Fernanda Rodrigues; Nícolas Augusto Rosin; Daniely Vaz da Silva-Sangoi
Source:
Forest ecology and management 2021 v.488 pp. 118983
ISSN:
0378-1127
Subject:
soil depth,   etc   ; Pinus taeda; bedrock; digital elevation models; forest ecology; forest management; landscapes; prediction; silviculture; spatial data; supply chain; topography; tree height; Brazil;     Show all 14 Subjects
Abstract:
... Based on the premise that the modeling and mining of soil and environmental data are capable of generating useful spatial information for use and planning in the forestry supply chain, we have established the following objectives: i) predict soil depth (SoD) in a topographically complex landscape via Digital Soil Mapping (DSM), ii) evaluate the potential of incorporating spatial data on SoD ...
DOI:
10.1016/j.foreco.2021.118983

9. Litter manipulation effects on microbial communities and enzymatic activities vary with soil depth in a subtropical Chinese fir plantation

Author:
Ren Liu; Yang Zhang; Xiao-Fei Hu; Songze Wan; Huimin Wang; Chao Liang; Fu-Sheng Chen
Source:
Forest ecology and management 2021 v.480 pp. 118641
ISSN:
0378-1127
Subject:
soil depth,   etc   ; Cunninghamia lanceolata; administrative management; carbon; forest ecology; microbial biomass; microbial communities; soil microorganisms; stoichiometry;     Show all 9 Subjects
Abstract:
... , enzymatic stoichiometry depended more on soil depth than litter manipulation. Soil nutrients, microbial biomass, and enzymatic activities, in addition to their internal associations, decreased with increasing profile depths. Soil microbial communities and enzymatic activities exhibited asynchronous responses to litter manipulation with increasing profile depth. Our findings highlight the mechanistic ...
DOI:
10.1016/j.foreco.2020.118641

10. Influence of seasonal changes, weather factors and soil depth on the foraging activities of subterranean termites in Eucalyptus plantations

Author:
O. T. Alamu; F. K. Ewete
Source:
International journal of tropical insect science 2021 v.41 no.2 pp. 1213-1221
ISSN:
1742-7592
Subject:
soil depth,   etc   ; Eucalyptus; Isoptera; introduced species; mortality; rain; relative humidity; temperature;     Show all 8 Subjects
Abstract:
... Eucalyptus tree is an important exotic species used for building construction, environmental amelioration and ornamental purposes in the tropics. However, termites cause a great damage and high mortality to seedlings and saplings of Eucalyptus in the field. Information on critical period and soil depth of termite foraging activities is required to formulate effective management programme ...
DOI:
10.1007/s42690-020-00311-8

11. The effect of soil depth on temperature sensitivity of extracellular enzyme activity decreased with elevation: Evidence from mountain grassland belts

Author:
Yiping Zuo; Hongjin Zhang; Jianping Li; Xiaodong Yao; Xinyue Chen; Hui Zeng; Wei Wang
Source:
Science of the total environment 2021 v.777 pp. 146136
ISSN:
0048-9697
Subject:
soil depth,   etc   ; acid phosphatase; altitude; enzyme activity; extracellular enzymes; grasslands; leucyl aminopeptidase; nitrogen; phosphorus; soil carbon; soil enzymes; temperature; China;     Show all 13 Subjects
Abstract:
... Temperature sensitivity of soil extracellular enzyme activity (EEA), indicated by the temperature coefficient Q₁₀, is used to predict the effect of temperature on soil carbon (C), nitrogen (N), and phosphorus (P) cycling. At present, we lack understanding of elevation and soil depth variations in Q₁₀ of EEA. Here, we measured the Q₁₀ of three enzymes participating in C- (β-1,4-glucosidase, BG), N ...
DOI:
10.1016/j.scitotenv.2021.146136

12. Seasonal Dynamics of the Underground Part of the Ephemeral–Wormwood Semidesert of the Kura–Araks Lowland under Modern Climatic Conditions

Author:
S. A. Ganieva; E. A. Gurbanov
Source:
Arid ecosystems 2021 v.11 no.1 pp. 44-51
ISSN:
2079-0961
Subject:
soil depth,   etc   ; climate change; plant development;     Show all 3 Subjects
Abstract:
... years. Data illustrating repeated experiments and observations are given in the tables and figures. It is concluded that a decrease in root mass with soil depth has a pronounced pattern in plant communities. ...
DOI:
10.1134/S207909612101008X

13. Changes in microbial biomass, community composition and diversity, and functioning with soil depth in two alpine ecosystems on the Tibetan plateau

Author:
Tianle Xu; Xiao Chen; Yanhui Hou; Biao Zhu
Source:
Plant and soil 2021 v.459 no.1-2 pp. 137-153
ISSN:
0032-079X
Subject:
soil depth,   etc   ; Bacteroidetes; Basidiomycota; carbon; community structure; databases; meadows; microbial biomass; microbial communities; mineralization; shrublands; soil carbon; soil profiles; China;     Show all 14 Subjects
Abstract:
... the ratio of Gram-positive to Gram-negative bacteria increased with depth in both ecosystems. Microbial community composition showed significant differences among soil depths and between ecosystems. The relative abundance of some phylum of archaea, bacteria or fungi (e.g. Basidiomycota, Bacteroidetes) changed significantly with soil depth and ecosystem type. Bacteria diversity declined with depth, while ...
DOI:
10.1007/s11104-020-04712-z

14. The molecular composition of extractable soil microbial compounds and their contribution to soil organic matter vary with soil depth and tree species

Author:
Marcel Lorenz; Diana Hofmann; Bernhard Steffen; Klaus Fischer; Sören Thiele-Bruhn
Source:
Science of the total environment 2021 v.781 pp. 146732
ISSN:
0048-9697
Subject:
soil depth,   etc   ; Fagus sylvatica; Pinus nigra; Pseudotsuga menziesii; chloroform; electrospray ionization mass spectrometry; environment; forest litter; fumigation; microbial biomass; microbial carbon; mineral soils; nitrogen; phosphorus; soil organic matter; trees;     Show all 16 Subjects
Abstract:
... floor and mineral soil layers) at a recultivated and afforested post-mining site were investigated for the influence of litter quality from different tree species (Fagus sylvatica, Pseudotsuga menziesii, Pinus nigra) and soil depth – representing different degrees of organic matter (OM) turnover – on the molecular composition of chloroform fumigation extracted SMB-derived compounds in comparison ...
DOI:
10.1016/j.scitotenv.2021.146732

15. Influence of Gully Land Consolidation on Phreatic Water Transformation in the Loess Hilly and Gully Region

Author:
Zihao Guo; Jianen Gao; Pengcheng Sun; Shaohui Dou; Juan Li; Xianyong Lou; Hong Wang; Rafiq Ahmad; Zhe Gao
Source:
Water 2021 v.13 no.4 pp. -
ISSN:
2073-4441
Subject:
soil depth,   etc   ; loess; rain; water; China;     Show all 5 Subjects
Abstract:
... Gully Land Consolidation (GLC) is a proven method to create farmlands and increase crop yields in the Loess Hilly and Gully Region, China. However, GLC influences phreatic water transformation and might cause the farmlands water disasters, such as salinization and swamping. For exploring the influence of GLC on phreatic water transformation and mitigating disasters, a series of indoor experiments ...
DOI:
10.3390/w13040538

16. Microbes require a relatively long time to recover in natural succession restoration of degraded grassland ecosystems

Author:
Qian Zhang; Kesi Liu; Xinqing Shao; Hui Li; Yixuan He; Sirimuji; Baojie Wang
Source:
Ecological indicators 2021 v.129 pp. 107881
ISSN:
1470-160X
Subject:
soil depth,   etc   ; Bacteroidetes; grasslands; meta-analysis; microbial activity;     Show all 5 Subjects
Abstract:
... activity mainly occurred in the 0–20 cm soil depth layer. Numbers of bacteria, fungi, and actinomycetes significantly increased at the six to 10 year stage of restoration succession. When restoration succession ceased after 10 years, most microorganisms began to decrease. During natural restoration succession, the diversity of fungi and bacteroidetes increased, while chloroflexi diversity decreased ...
DOI:
10.1016/j.ecolind.2021.107881

17. A conceptual modelling framework for simulating the impact of soil degradation on maize yield in data-sparse regions of the tropics

Author:
Samuel G.K. Adiku; Dilys S. MacCarthy; Samuel K. Kumahor
Source:
Ecological modelling 2021 v.448 pp. 109525
ISSN:
0304-3800
Subject:
soil depth,   etc   ; corn; data collection; nitrogen; soil degradation;     Show all 5 Subjects
Abstract:
... that is capable of simulating the impact of soil degradation on maize yields using field-scale agriculture data. The major departure of this new modelling framework is the description of erosion in terms of soil depth loss instead of soil mass loss. The framework, which was developed from an assembly of relevant theory and equations in the published literature is designed to address the data paucity challenges ...
DOI:
10.1016/j.ecolmodel.2021.109525

18. History of petroleum disturbance triggering the depth-resolved assembly process of microbial communities in the vadose zone

Author:
Yizhi Sheng; Ying Liu; Juejie Yang; Hailiang Dong; Bo Liu; Hao Zhang; Aiyang Li; Yuquan Wei; Guanghe Li; Dayi Zhang
Source:
Journal of hazardous materials 2021 v.402 pp. 124060
ISSN:
0304-3894
Subject:
soil depth,   etc   ; bioremediation; microbial communities; petroleum; vadose zone;     Show all 5 Subjects
Abstract:
... hydrocarbons exhibited higher concentrations at the long-term contaminated site, showing negative impacts on some soil properties, retarding in the surface soils and decreasing along soil depth. Cultivable fraction of heterotrophic bacteria and microbial α-diversity decreased along depth in vadose zones with short-term/no contamination history, but exhibited an opposite trend with long-term contamination ...
DOI:
10.1016/j.jhazmat.2020.124060

19. The dynamics of phosphorus fractions and the factors driving phosphorus cycle in Zoige Plateau peatland soil

Author:
Ling Luo; Haoyang Ye; Danhua Zhang; Ji-Dong Gu; Ouping Deng
Source:
Chemosphere 2021 v.278 pp. 130501
ISSN:
0045-6535
Subject:
soil depth,   etc   ; microbial activity; peatlands; phosphorus; plant growth; China;     Show all 6 Subjects
Abstract:
... and investigating a series of abiotic and biotic factors. It is found that season, peatland type, and soil depth could strongly affect P dynamics. H₂O–P and NaHCO₃–P (labile P) had lower content, while NaOH–P, HCl–P, Mix-P, and Residual-P (non-labile P) were the dominant fractions. Besides, the sum of P fractions was higher than the traditional measurement of total P, suggesting P storage might be underestimated ...
DOI:
10.1016/j.chemosphere.2021.130501

20. Changes in Soil C, N, and P Concentrations and Stoichiometry in Karst Trough Valley Area under Ecological Restoration: The Role of Slope Aspect, Land Use, and Soil Depth

Author:
Tianyang Li; Jiangmin Zeng; Binghui He; Zhanpeng Chen
Source:
Forests 2021 v.12 no.2 pp. -
ISSN:
1999-4907
Subject:
soil depth,   etc   ; ecological restoration; forest plantations; grasslands; karsts; land use; secondary forests; soil organic carbon; stoichiometry; total nitrogen; total phosphorus;     Show all 11 Subjects
Abstract:
... This study aims to investigate the roles of slope aspect, land use and soil depth in altering the soil organic carbon (C), total nitrogen (N), and total phosphorus (P) traits in the karst trough valley area experiencing extensive ecological restoration. A total of 54 soil samples were collected at 0–10, 10–20, and 20–30 cm soil depths from secondary forest, plantation forest, and grassland ...
DOI:
10.3390/f12020144