Cutaneous excreta of the earthworm Eisenia fetida (Haplotaxida: Lumbricidae) might hinder the biological control performance of entomopathogenic nematodes
Publication date: Available online 3 December 2019Source: Soil Biology and BiochemistryAuthor(s): Maryam Chelkha, Rubén Blanco-Pérez, Francisco Ángel Bueno-Pallero, Souad Amghar, Abdellatif El Harti, Raquel Campos-HerreraAbstractEarthworms enhance soil structure, the decomposition of organic matter and the dissemination of beneficial soil organisms such as the entomopathogenic nematodes (EPNs). Nevertheless, the effects of earthworm feeding behavior or cutaneous excreta (CEx) on the performance of EPNs as biological control agents is poorly understood. We hypothesised that the presence of earthworms or...
Source: Soil Biology and Biochemistry - December 4, 2019 Category: Biology Source Type: research

Soil microbial community responses to labile organic carbon fractions in relation to soil type and land use along a climate gradient
In this study, we explored the influence of labile SOC fractions on the topsoil bacteria-archaea community across 28 sites with different land use, climate aridity, and soil types across a wide range of SOC content (0.6–12%) in central Chile. We applied Illumina sequencing to the 16S rRNA to examine shifts in the diversity and composition of these soil microbial communities. Additionally, labile SOC fractions such as the permanganate oxidizable carbon (POXC) and light fraction organic matter (LFOM), along with the soil physicochemical properties were analyzed. The results demonstrated that among all of the environmen...
Source: Soil Biology and Biochemistry - December 4, 2019 Category: Biology Source Type: research

Effects of mixed-species litter on bacterial and fungal lignocellulose degradation functions during litter decomposition
Publication date: Available online 27 November 2019Source: Soil Biology and BiochemistryAuthor(s): Wenbo Wang, Qian Zhang, Xiaomei Sun, Dongsheng Chen, Heribert Insam, Roger T. Koide, Shougong ZhangAbstractLignocellulose is the main component of forest litter. Due to the recalcitrance of coniferous litter, nutrient turnover is usually slower in coniferous plantations. Lignocellulose decomposition is reportedly rapid in mixed-species litter, but the underlying microbial metabolic pathways that may explain this rapid rate are not well-studied. We collected litter at 60, 150, 270, and 360 days after leaf fall at three plantat...
Source: Soil Biology and Biochemistry - November 28, 2019 Category: Biology Source Type: research

Estimating relative cellulolytic and ligninolytic enzyme activities as functions of lignin and cellulose content in decomposing plant litter
Publication date: Available online 26 November 2019Source: Soil Biology and BiochemistryAuthor(s): Michaela G. Margida, Gwenaëlle Lashermes, Daryl L. MoorheadAbstractExtracellular enzymes catalyze plant litter decomposition, including enzymes that degrade holocellulose (E2) and lignin (E3). To estimate relative enzyme activities associated with observed patterns of hollocellulose (C2) and lignin (C3) decay, we set observed decay rates equal to reverse Michaelis-Menten equations. Results were consistent with empirical studies, showing a negative relationship of E2/(E2+E3) to litter lignin content, C3/(C2+C3), above a m...
Source: Soil Biology and Biochemistry - November 28, 2019 Category: Biology Source Type: research

Root litter diversity and functional identity regulate soil carbon and nitrogen cycling in a typical steppe
This study investigated the effects of species diversity and functional traits of root litter on soil CO2 and N2O release, net ammonification, net nitrification, and net N mineralization based on a 56-day incubation of grassland soils with root litter mixtures containing one, two, or four native plant species. The increasing species richness of root litter decreased the cumulative CO2 and N2O release in the soil, but enhanced the net ammonification, nitrate immobilization, and N mineralization. Root litter diversity has a predominant non-additive antagonistic effect on the release of soil CO2 and N2O, and a synergistic eff...
Source: Soil Biology and Biochemistry - November 26, 2019 Category: Biology Source Type: research

Stabilization of microbial residues in soil organic matter after two years of decomposition
Publication date: Available online 25 November 2019Source: Soil Biology and BiochemistryAuthor(s): Chao Wang, Xu Wang, Guangting Pei, Zongwei Xia, Bo Peng, Lifei Sun, Jian Wang, Decai Gao, Shidong Chen, Dongwei Liu, Weiwei Dai, Ping Jiang, Yunting Fang, Chao Liang, Nanping Wu, Edith BaiAbstractMicrobially-derived nitrogen (N) has been considered as one of important contributors to soil organic N, but few studies have quantified the rate of necromass N decomposition. Here, via an in situ incubation of 15N-labeled necromass, we found that 33.1–39.5% of the initial 15N stabilized in the soil as non-living organic N afte...
Source: Soil Biology and Biochemistry - November 26, 2019 Category: Biology Source Type: research

Rare microbial taxa as the major drivers of ecosystem multifunctionality in long-term fertilized soils
Publication date: Available online 22 November 2019Source: Soil Biology and BiochemistryAuthor(s): Qing-Lin Chen, Jing Ding, Dong Zhu, Hang-Wei Hu, Manuel Delgado-Baquerizo, Yi-Bing Ma, Ji-Zheng He, Yong-Guan ZhuAbstractSoil microbial communities play an essential role in driving multiple functions (i.e., multifunctionality) that are central to the global biogeochemical cycles. Long-term fertilization has been reported to reduce the soil microbial diversity, however, the impact of fertilization on multifunctionality and its relationship with soil microbial diversity remains poorly understood. We used amplicon sequencing an...
Source: Soil Biology and Biochemistry - November 23, 2019 Category: Biology Source Type: research

Anaerobic oxidation of methane in paddy soil: Role of electron acceptors and fertilization in mitigating CH4 fluxes
Publication date: Available online 22 November 2019Source: Soil Biology and BiochemistryAuthor(s): Lichao Fan, Michaela A. Dippold, Tida Ge, Jinshui Wu, Volker Thiel, Yakov Kuzyakov, Maxim DorodnikovAbstractThe anaerobic oxidation of methane (AOM) in marine ecosystems is ubiquitous and largely coupled to sulfate reduction. In contrast, the role of AOM in terrestrial environments and the dominant electron acceptors driving terrestrial AOM needs deeper understanding. Submerged rice paddies with intensive CH4 production have a high potential for AOM, which can be important for greenhouse gas mitigation strategies. Here, we us...
Source: Soil Biology and Biochemistry - November 23, 2019 Category: Biology Source Type: research

A conceptual model of carbon stabilisation based on patterns observed in different soils
Publication date: Available online 22 November 2019Source: Soil Biology and BiochemistryAuthor(s): Miko U.F. Kirschbaum, Gabriel Y.K. Moinet, Carolyn B. Hedley, Michael H. Beare, Sam R. McNallyAbstractIn principle, greenhouse gas emissions can be offset by increasing soil carbon stocks. Full utilisation of that potential, however, requires a good understanding of the controls on carbon stocks to identify factors that can be modified through management changes and distinguish those from factors that are inherent soil properties that cannot be modified. Here, we present a conceptual model of protected (or stabilised) carbon ...
Source: Soil Biology and Biochemistry - November 23, 2019 Category: Biology Source Type: research

Leaching of organic carbon from grassland soils under anaerobiosis
Publication date: Available online 23 November 2019Source: Soil Biology and BiochemistryAuthor(s): Erxiong Zhu, Ting Liu, Lei Zhou, Simin Wang, Xin Wang, Zhenhua Zhang, Zhengwen Wang, Yongfei Bai, Xiaojuan FengAbstractThe projected increase of extreme precipitation and freeze-thawing events may lead to frequent occurrence of anaerobiosis in upland soils, which has significant impacts on biogeochemical processes affecting soil carbon loss. However, compared to mineralization, the impacts of anaerobiosis (potentially accompanied by fermentation) on soil organic carbon (SOC) leaching is limited. Here we conducted microcosm an...
Source: Soil Biology and Biochemistry - November 23, 2019 Category: Biology Source Type: research

Pyrogenic organic matter effects on soil bacterial community composition
Publication date: Available online 21 November 2019Source: Soil Biology and BiochemistryAuthor(s): Jamie Woolet, Thea WhitmanAbstractPyrogenic organic matter (PyOM) is produced by the incomplete combustion of organic matter, and can represent a large portion of total soil organic carbon in both fire-affected systems and managed systems where PyOM is added intentionally as a soil amendment. The effects of PyOM on the structure of soil microbial communities remain a topic of fundamental interest, and a number of studies have begun to identify and characterize the PyOM-associated microbial community. However, it is unclear to...
Source: Soil Biology and Biochemistry - November 22, 2019 Category: Biology Source Type: research

Editorial Board
Publication date: January 2020Source: Soil Biology and Biochemistry, Volume 140Author(s): (Source: Soil Biology and Biochemistry)
Source: Soil Biology and Biochemistry - November 22, 2019 Category: Biology Source Type: research

Spatial heterogeneity of temperature sensitivity of soil respiration: A global analysis of field observations
Publication date: Available online 19 November 2019Source: Soil Biology and BiochemistryAuthor(s): Jinquan Li, Junmin Pei, Elise Pendall, Changming Fang, Ming NieAbstractThe temperature sensitivity of soil respiration (Q10) plays a key role in benchmarking the intensity of terrestrial soil carbon-climate feedbacks. However, there is large spatial heterogeneity of Q10 that remains unexplained at the global scale. Here, we collected 480 estimates of Q10 values from field studies to explore the spatial heterogeneity of Q10 values and their controls at both global and regional scales. We used structural equation modeling to ex...
Source: Soil Biology and Biochemistry - November 21, 2019 Category: Biology Source Type: research

Fertilizer types shaped the microbial guilds driving the dissimilatory nitrate reduction to ammonia process in a Ferralic Cambisol
Publication date: Available online 19 November 2019Source: Soil Biology and BiochemistryAuthor(s): Xuesong Luo, Hang Qian, Li Wang, Shun Han, Shilin Wen, Boren Wang, Qiaoyun Huang, Wenli ChenAbstractDissimilatory nitrate reduction to ammonia (DNRA) is one of the three processes of soil nitrate reduction. However, relationships between DNRA microbes and nutrient fertilization are poorly known. We studied the DNRA microbial community in a Ferralic Cambisol containing plots including control without fertilization, swine manure fertilization (M), chemical fertilization (NPK), and chemical/manure combined fertilization (MNPK) t...
Source: Soil Biology and Biochemistry - November 21, 2019 Category: Biology Source Type: research

Arctic soil water chemistry in dry and wet tundra subject to snow addition, summer warming and herbivory simulation
Publication date: Available online 19 November 2019Source: Soil Biology and BiochemistryAuthor(s): Laura H. Rasmussen, Anders Michelsen, Pernille Ladegaard-Pedersen, Cecilie S. Nielsen, Bo ElberlingAbstractMultiple and rapid environmental changes in the Arctic have major consequences for the entire ecosystem. Soil water chemistry is one component with important implications for understanding climate feedbacks, plant growth, microbial turnover and net greenhouse gas emissions. Here we assess the contrasting growing season soil water chemistry in a Low arctic Greenlandic mesic tundra heath and a fen, which have been subjecte...
Source: Soil Biology and Biochemistry - November 21, 2019 Category: Biology Source Type: research

Predicting climate change impacts on maritime Antarctic soils: A space-for-time substitution study
We report a space-for-time substitution study predicting the impacts of climate change on vegetated maritime Antarctic soils. Analyses of soils from under Deschampsia antarctica sampled from three islands along a 2,200 km climatic gradient indicated that those from sub-Antarctica had higher moisture, organic matter and carbon (C) concentrations, more depleted δ13C values, lower concentrations of the fungal biomarker ergosterol and higher concentrations of bacterial PLFA biomarkers and plant wax n-alkane biomarkers than those from maritime Antarctica. Shallow soils (2 cm depth) were wetter, and had higher concentr...
Source: Soil Biology and Biochemistry - November 21, 2019 Category: Biology Source Type: research

Major element residence times in humus from a beech forest: The role of element forms and recycling
This study presents the relationship between inputs of elements (especially biominerals), their recycling mechanisms and the average residence time of the major elements in mull humus.In forest ecosystems with generally low element inputs, decomposing leaf litter is an important source of soil nutrients. While the processes and the release speeds of elements, such as C, N and P, are well determined during litter degradation, less is known about elements like Fe, Al, Mg, Mn, Si, Ca, K, or Na, some of which are essential for tree nutrition.The objective of this study was to determine the average residence time of these eleme...
Source: Soil Biology and Biochemistry - November 19, 2019 Category: Biology Source Type: research

Microbial resistance promotes plant production in a four-decade nutrient fertilization experiment
Publication date: Available online 19 November 2019Source: Soil Biology and BiochemistryAuthor(s): Kunkun Fan, Manuel Delgado-Baquerizo, Xisheng Guo, Daozhong Wang, Yong-Guan Zhu, Haiyan ChuAbstractThere is a current lack of mechanistic understanding on the relationships between a soil microbial community, crop production, and nutrient fertilization. Here, we combined ecological network theory with ecological resistance index to evaluate the responses of microbial community to additions of multiple inorganic and organic fertilizers, and their associations with wheat production in a 35-year field experiment. We found that m...
Source: Soil Biology and Biochemistry - November 19, 2019 Category: Biology Source Type: research

Selective inhibition of ammonia oxidising archaea by simvastatin stimulates growth of ammonia oxidising bacteria
This study aimed to investigate the potency and specificity of simvastatin as a specific AOA inhibitor in pure cultures and in soil and to determine the effect of AOA inhibition on both ammonia oxidation activity and growth of AOB, under the hypothesis that AOB growth is higher when competition for NH4+ from AOA is removed. Simvastatin selectively inhibited pure cultures of all tested AOA at concentrations of 8–100 μM. In soil microcosms incubated for 21 days with low and high NH4+ concentrations, AOA but not AOB were selectively inhibited by simvastatin in both acidic (pH 4.5) and near-neutral (pH 6.5) soils. A...
Source: Soil Biology and Biochemistry - November 18, 2019 Category: Biology Source Type: research

Plant roots and deep-banded nutrient-rich amendments influence aggregation and dispersion in a dispersive clay subsoil
This study assessed the effect of deep-banding nutrient-rich amendments on aggregation and dispersion of a clay subsoil in the presence and absence of wheat (Triticum aestivum) roots under controlled environment conditions. A specially-designed dual-column was set up to simulate a soil profile where a well-structured topsoil overlaid a sodic clay subsoil with an exchangeable sodium percentage (ESP) of 21%. The five amendments include a control (zero amendments), fertilizer nutrients (NPKS), wheat straw + fertilizer nutrients (straw/NPKS), poultry litter (PL) and poultry litter + controlled-release ferti...
Source: Soil Biology and Biochemistry - November 16, 2019 Category: Biology Source Type: research

Biological soil crust succession in deserts through a 59-year-long case study in China: How induced biological soil crust strategy accelerates desertification reversal from decades to years
This study provides the first description of the continuous BSC succession, comprehensively discusses the mechanisms of BSC formation and succession and provides important guides for selection of strategies for the engineering reversals of desertification. (Source: Soil Biology and Biochemistry)
Source: Soil Biology and Biochemistry - November 15, 2019 Category: Biology Source Type: research

15N tracing studies including plant N uptake processes provide new insights on gross N transformations in soil-plant systems
In this study, gross N transformation rates were quantified using a subtropical acidic forest with and without plants (and under different soil storage conditions). The results showed that the gross rates of N mineralization in air-dried and rewetted soil significantly increased, while the gross rates of nitrification and immobilization decreased, compared with fresh soil. Soil storage for more than one month at 4 °C (typical refrigerated conditions) and room temperature (25 °C) did not affect the gross rates of soil N mineralization and immobilization but significantly inhibited heterotrophic nitrification rat...
Source: Soil Biology and Biochemistry - November 15, 2019 Category: Biology Source Type: research

Soil fertility and crop production are fostered by micro-nano bubble irrigation with associated changes in soil bacterial community
Publication date: Available online 11 November 2019Source: Soil Biology and BiochemistryAuthor(s): Yunpeng Zhou, Felipe Bastida, Bo Zhou, Yifei Sun, Tao Gu, Shuqin Li, Yunkai LiAbstractThe improvement of aeration conditions in the rhizosphere is beneficial for crop growth and productivity. However, its effects on the soil microbial community are less known. Due to microbial sentivity to environmental changes, transporting micro-nano bubble water (MNBW) to the crop rhizosphere is expected to shift soil microbial community. A two-year MNBW irrigation field experiment consisting of two mixing ratios of MNBW and groundwater (h...
Source: Soil Biology and Biochemistry - November 12, 2019 Category: Biology Source Type: research

Direct measurement of the in situ decomposition of microbial-derived soil organic matter
Publication date: Available online 8 November 2019Source: Soil Biology and BiochemistryAuthor(s): Yuntao Hu, Qing Zheng, Lisa Noll, Shasha Zhang, Wolfgang WanekAbstractSoil organic matter (SOM) is the dominant reservoir of terrestrial organic carbon and nitrogen, and microbial necromass represents a primary input to it. However, knowledge of stabilization mechanisms and direct measurements of the decomposition of microbial-derived SOM are lacking. Here we report a novel 15N isotope pool dilution approach using labeled amino sugars and muropeptides as tracers to quantify the decomposition of proteins and microbial cell wall...
Source: Soil Biology and Biochemistry - November 9, 2019 Category: Biology Source Type: research

Tracing life at the dry limit using phospholipid fatty acids – does sampling matter?
Publication date: Available online 8 November 2019Source: Soil Biology and BiochemistryAuthor(s): Stephanie Kusch, Andrea Jaeschke, Ramona Mörchen, Janet RethemeyerAbstractPhospholipid fatty acids (PLFAs) have been used to trace bacterial life in extremely carbon-poor soils of the hyperarid Atacama Desert. However, the low abundances of bacteria and, thus, PLFAs increases the risk of contamination by exogenous PLFAs. Here, we assess whether field sampling strategies (super-clean, clean, and regular sampling protocols) have an effect on PLFA diversity and abundance in hyperarid Atacama soils or whether laboratory proce...
Source: Soil Biology and Biochemistry - November 9, 2019 Category: Biology Source Type: research

Microbial growth and enzyme kinetics in rhizosphere hotspots are modulated by soil organics and nutrient availability
Publication date: Available online 8 November 2019Source: Soil Biology and BiochemistryAuthor(s): Peng Tian, Bahar S. Razavi, Xuechen Zhang, Qingkui Wang, Evgenia BlagodatskayaAbstractThe input of labile organics by plant roots stimulates microbial activity and therefore facilitates biochemical process rates in the rhizosphere compared to bulk soil, forming microbial hotspots. However, the extent to which the functional properties of soil microorganisms are different in the hotspots formed in soils with contrasting fertility remains unclear. We identified the hotspots related to different levels of Zea mays L. root archite...
Source: Soil Biology and Biochemistry - November 9, 2019 Category: Biology Source Type: research

Nonlinear responses of the Vmax and Km of hydrolytic and polyphenol oxidative enzymes to nitrogen enrichment
Publication date: Available online 5 November 2019Source: Soil Biology and BiochemistryAuthor(s): Weixing Liu, Rui Tian, Ziyang Peng, Sen Yang, Xiao xiao Liu, Yashu Yang, Wenhao Zhang, Lingli LiuAbstractThe kinetics of soil microbial extracellular enzymes are important in regulating soil organic matter decomposition and ecosystem function. However, it is still unclear how the kinetic parameters (Vmax and Km) of hydrolytic and polyphenol oxidative enzymes respond to increased nitrogen (N) deposition and to what extent they regulate microbial respiration under N enrichment. We measured the Vmax and Km of seven soil hydrolyti...
Source: Soil Biology and Biochemistry - November 6, 2019 Category: Biology Source Type: research

Soil microbial carbon and nutrient constraints are driven more by climate and soil physicochemical properties than by nutrient addition in forest ecosystems
Publication date: Available online 4 November 2019Source: Soil Biology and BiochemistryAuthor(s): Xin Jing, Xiao Chen, Jingyun Fang, Chengjun Ji, Haihua Shen, Chengyang Zheng, Biao ZhuAbstractSoil enzymes are indicative of soil microbial carbon (C) and nutrient limitations. They are playing an important role in global C and nutrient cycles. However, we know little about whether soil microbial C and nutrient limitations are pervasive across broad spatial scales, and how soil enzymes respond to the addition of nitrogen (N) and phosphorus (P). Here we used a nutrient addition network across eight forest ecosystems ranging fro...
Source: Soil Biology and Biochemistry - November 6, 2019 Category: Biology Source Type: research

Soil microbial populations substitute phospholipids with betaine lipids in response to low P availability
Publication date: Available online 4 November 2019Source: Soil Biology and BiochemistryAuthor(s): Charles R. WarrenAbstractSoil microbes can be limited by phosphorus availability. A significant proportion of cellular P is accounted for by the phospholipids that comprise membranes. Experiments with aquatic microbial communities and isolated microbes have shown one way microbes can reduce their cellular P requirements is by substituting phospholipids with P-free polar lipids. We do not know if soil microbial communities can also spare P by using P-free lipids instead of phospholipids.The aims of this study were to examine a ...
Source: Soil Biology and Biochemistry - November 4, 2019 Category: Biology Source Type: research

Expression of major intrinsic protein genes in Sorghum bicolor roots under water deficit depends on arbuscular mycorrhizal fungal species
In this study, sorghum (Sorghum bicolor) was inoculated with two arbuscular mycorrhizal fungi, either the standard Rhizophagus irregularis or the desert-adapted Rhizophagus arabicus, and grown in experimental microcosms under well-watered or drought conditions. We investigated gene expression of selected major intrinsic proteins (MIPs) of sorghum in these mycorrhizal plants in comparison to non-inoculated, well-watered controls. Colonization with R. irregularis resulted in the induction of the MIPs SbPIP2.2 and SbPIP2.5, regardless of whether sorghum plants were well watered or not. Root colonization with R. arabicus, howe...
Source: Soil Biology and Biochemistry - November 1, 2019 Category: Biology Source Type: research

Phylogenetic signature of fungal response to long-term chemical pollution
Publication date: Available online 31 October 2019Source: Soil Biology and BiochemistryAuthor(s): Vladimir S. Mikryukov, Olesya V. Dulya, Makar V. ModorovAbstractTerritories around industrial enterprises represent gradients of soil acidity and heavy metal excess. Exploration of soil fungal communities in pollution gradients serves the remediation interests and brings fundamental knowledge about biota response to environmental changes. In this work, using industrial pollution as a model of environmental filtering, we performed high-throughput sequencing of 180 soil samples collected along strong long-term pollution gradient...
Source: Soil Biology and Biochemistry - November 1, 2019 Category: Biology Source Type: research

Rapid root assimilation of added phosphorus in a lowland tropical rainforest of French Guiana
Publication date: Available online 1 November 2019Source: Soil Biology and BiochemistryAuthor(s): Leandro Van Langenhove, Ivan A. Janssens, Lore Verryckt, Laetitia Brechet, Iain P. Hartley, Clement Stahl, Elodie Courtois, Ifigenia Urbina, Oriol Grau, Jordi Sardans, Guille Peguero, Albert Gargallo-Garriga, Josep Peñuelas, Sara ViccaAbstractTheory states that tree growth in lowland tropical forests on old, weathered soils is limited by low phosphorous (P) availability. However, evidence for P limitation from nutrient manipulation experiments remains unclear, which raises the question whether trees are taking up added ...
Source: Soil Biology and Biochemistry - November 1, 2019 Category: Biology Source Type: research

Organic matter priming by invasive plants depends on dominant mycorrhizal association
Publication date: Available online 1 November 2019Source: Soil Biology and BiochemistryAuthor(s): Amit Kumar, Richard P. Phillips, Andrea Scheibe, Saskia Klink, Johanna PauschAbstractWhile it has long been held that invasive plants alter ecosystem processes, the magnitude and direction of these effects have rarely been quantified in situ. We measured the effects of an invasive C4 grass (Microstegium vimineum) on soil organic matter (SOM) decomposition in a deciduous forest in south-central Indiana, USA. The unique 13C signature of the C4 grass relative to the C3 trees allowed us to partition soil CO2 fluxes and estimate M....
Source: Soil Biology and Biochemistry - November 1, 2019 Category: Biology Source Type: research

Biodiversity associations of soil fauna and plants depend on plant life form and are accounted for by rare taxa along an elevational gradient
This study aimed at exploring the alpha and beta diversity associations between plants and soil fauna along an elevational gradient while systematically considering rare to abundant plants and animals, and different plant life forms. We sampled soil fauna (litter fauna and rhizosphere fauna of trees, shrubs and herbs) and investigated plant diversity in 119 plots along an elevational gradient (from 1,020 to 1,770 asl) on Dongling Mountain, China. We calculated alpha diversity from both Rényi's generalized entropy function and Jost's effective species numbers assigning different weights to abundant and rare taxa. Bet...
Source: Soil Biology and Biochemistry - October 31, 2019 Category: Biology Source Type: research

Body size structure of soil fauna along geographic and temporal gradients of precipitation in grasslands
Publication date: Available online 29 October 2019Source: Soil Biology and BiochemistryAuthor(s): Walter S. Andriuzzi, André L.C. Franco, Katharine E. Ankrom, Shuyan Cui, Cecilia M. de Tomasel, Pingting Guan, Laureano A. Gherardi, Osvaldo E. Sala, Diana H. WallAbstractPrecipitation is a global driver of animal abundance and diversity in terrestrial ecosystems, but we know little on how it influences the body size structure of invertebrate communities, particularly soil fauna. It is unclear whether aridity limits the abundance of large-bodied soil invertebrates, and whether temporal precipitation changes can induce l...
Source: Soil Biology and Biochemistry - October 31, 2019 Category: Biology Source Type: research

Arbuscular mycorrhiza enhances rhizodeposition and reduces the rhizosphere priming effect on the decomposition of soil organic matter
Publication date: Available online 25 October 2019Source: Soil Biology and BiochemistryAuthor(s): Jie Zhou, Huadong Zang, Sebastian Loeppmann, Matthias Gube, Yakov Kuzyakov, Johanna PauschAbstractArbuscular mycorrhizal fungi (AMF) represent an important route for plant carbon (C) inputs into the soil. Nonetheless, the C input via AMF as well as its impact on soil organic matter (SOM) stabilization and C sequestration remains largely unknown. A mycorrhizal wild type progenitor (MYC) and its mycorrhiza defective mutant (reduced mycorrhizal colonization: rmc) of tomato were continuously labeled with 13CO2 to trace root C inpu...
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Can naturally-occurring endophytic nitrogen-fixing bacteria of hybrid white spruce sustain boreal forest tree growth on extremely nutrient-poor soils?
Publication date: Available online 26 October 2019Source: Soil Biology and BiochemistryAuthor(s): Akshit Puri, Kiran Preet Padda, Chris P. ChanwayAbstractThe West Chilcotin region in British Columbia, Canada is located in the Sub-Boreal zone characterized by dry and weakly developed soils lacking essential plant nutrients, particularly nitrogen. Yet, hybrid white spruce (Picea glauca x engelmannii) trees thrive on such nitrogen-limited soils, raising a crucial question regarding their nitrogen sources. The presence of endophytic diazotrophic bacteria (nitrogen-fixing bacteria living inside the plant tissues) was reported i...
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Land-use alters the temperature response of microbial carbon-use efficiency in soils – a consumption-based approach
Publication date: Available online 24 October 2019Source: Soil Biology and BiochemistryAuthor(s): Tobias Bölscher, Göran I. Ågren, Anke M. HerrmannAbstractSoil organic carbon (SOC) is a substantial source of atmospheric CO2, but also a large cause of uncertainties in Earth-system models. A principal control on soil CO2 release is the carbon-use efficiency (CUE) of microbial communities, which partitions the carbon (C) allocation between biosynthetic stabilization and CO2 respiration during SOC decomposition. In Earth-system models, CUE is commonly considered as a constant, although it should be susceptible ...
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Lithological and bioclimatic impacts on soil phosphatase activities in California temperate forests
Publication date: Available online 24 October 2019Source: Soil Biology and BiochemistryAuthor(s): Chunhao Gu, Stewart G. Wilson, Andrew J. MargenotAbstractOrganic phosphorus (Po) biogeochemical cycling is known to be impacted by soil forming factors, however, little is known about interactions among soil forming factors on the drivers of Po cycling, activities of phosphatase in soils. A comprehensive assessment of lithological and bioclimatic impacts on soil phosphatases was conducted using lithological and vegetation-constrained climatic (i.e., bioclimatic) gradients in the California areas. We hypothesized that lithology...
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Comparative metagenomics of two distinct biological soil crusts in the Tengger Desert, China
In this study, we compared two types of biocrusts (bacterial-dominated biocrusts and moss-dominated biocrusts) using shotgun metagenomic sequencing. Our results showed that Actinobacteria was the most abundant phylum in the microbiomes of bacterial and moss biocrusts, even though the two biocrusts differed in the composition of the following other abundant phyla Proteobacteria, Acidobacteria, Cyanobacteria, Planctomycetes and Bacteroidetes. The profile of the C- and N- related metabolic pathways of the metagenome differed between the bacterial and moss biocrusts. The results showed that the genes encoding carbon monoxide d...
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Corrigendum to Min et al. (2014) “Differential effects of pH on temperature sensitivity of organic carbon and nitrogen decay” [Soil Biology & Biochemistry 76 193–200]
Publication date: December 2019Source: Soil Biology and Biochemistry, Volume 139Author(s): Kyungjin Min, Christoph A. Lehmeier, Ford Ballantyne, Anna Tatarko, Sharon A. Billings (Source: Soil Biology and Biochemistry)
Source: Soil Biology and Biochemistry - October 26, 2019 Category: Biology Source Type: research

Water availability regulates negative effects of species mixture on soil microbial biomass in boreal forests
Publication date: Available online 23 October 2019Source: Soil Biology and BiochemistryAuthor(s): Xinli Chen, Han Y.H. Chen, Chen Chen, Sai PengAbstractSoil microorganisms are critical for the maintenance of terrestrial biodiversity and ecosystem functions. Both plant diversity and water availability are individually known to influence soil microorganisms; however, their interactive effects remain largely unknown. Here, we investigated whether the effects of tree species mixtures on microbial biomass and composition were altered by water availability. This was accomplished by sampling soils in the growing season from stand...
Source: Soil Biology and Biochemistry - October 25, 2019 Category: Biology Source Type: research

Influence of soil properties on N2O and CO2 emissions from excreta deposited on tropical pastures in Kenya
In this study we investigated the importance of soil properties on N2O and carbon dioxide (CO2) emissions from cattle excreta (dung, urine, and manure [dung + urine]) for five typical tropical soils in Kenya. For this, intact soil cores were translocated from Western Kenya (Nandi county) to Nairobi, where N2O and CO2 fluxes were measured over four individual periods (two during dry seasons and two during wet seasons). Fluxes were measured for between 25 and 73 days following surface application of excreta, depending on how quickly emissions returned to baseline. Both dung and manure applications led to increased ...
Source: Soil Biology and Biochemistry - October 25, 2019 Category: Biology Source Type: research

Does ectomycorrhiza have a universal key role in the formation of soil organic matter in boreal forests?
Publication date: Available online 23 October 2019Source: Soil Biology and BiochemistryAuthor(s): Mona N. Högberg, Ulf Skyllberg, Peter Högberg, Heike KnickerAbstractForest soil organic matter (SOM) is an important dynamic store of C and N, which releases plant available N and the greenhouse gases CO2 and N2O. Early stages of decomposition of recent plant litters are better known than the formation of older and more stable soil pools of N and C, in which case classic theory stated that selective preservation of more resistant plant compounds was important. Recent insights heighten that all plant matter becomes de...
Source: Soil Biology and Biochemistry - October 25, 2019 Category: Biology Source Type: research

Warming effects on carbon dynamics and microbial communities in soils of diverse texture
Publication date: Available online 24 October 2019Source: Soil Biology and BiochemistryAuthor(s): Sandra F. Yanni, Bobbi L. Helgason, H. Henry Janzen, Benjamin H. Ellert, Edward G. GregorichAbstractClimate change may profoundly influence soil organic carbon (SOC) dynamics through effects on soil temperature and water, but the mechanisms and magnitude of those effects remain uncertain. We measured the response of residue-C and native SOC in six soils with diverse texture subjected to artificial heating after transplanting to a common field site. The soils, three from each of two climatic zones in Canada, were amended with 1...
Source: Soil Biology and Biochemistry - October 25, 2019 Category: Biology Source Type: research

The invasive plant Mikania micrantha affects the soil foodweb and plant-soil nutrient contents in orchards
Publication date: Available online 24 October 2019Source: Soil Biology and BiochemistryAuthor(s): Feng Sun, Qiaojing Ou, Hanxia Yu, Na Li, Changlian PengAbstractMicrobial-microfaunal interactions play important roles in nutrient release and plant nutrient acquisition. However, the extent of their effects is sensitive to plant species identity, particularly among invasive plants, and the difference in effects can change the proportional abundances of soil functional groups, and subsequently change plant-soil element contents. Although the effects of invasive plants on soil microorganisms have been a widespread focus of ecol...
Source: Soil Biology and Biochemistry - October 25, 2019 Category: Biology Source Type: research

Ants reign over a distinct microbiome in forest soil
Publication date: Available online 20 October 2019Source: Soil Biology and BiochemistryAuthor(s): Stafva Lindström, Sari Timonen, Liselotte Sundström, Helena JohanssonAbstractBiotic and abiotic characteristics shape the microbial communities in the soil environment. Manipulation of soil, performed by ants when constructing their nests, radically changes the soil characteristics and creates a unique environment, which differs in its composition, frequency and abundance of microbial taxa, from those in the reference soils. We sampled nests of the mound-building ant Formica exsecta, and the surrounding reference soi...
Source: Soil Biology and Biochemistry - October 20, 2019 Category: Biology Source Type: research

Understanding how long-term organic amendments increase soil phosphatase activities: Insight into phoD- and phoC-harboring functional microbial populations
Publication date: Available online 20 October 2019Source: Soil Biology and BiochemistryAuthor(s): Gongwen Luo, Bo Sun, Ling Li, Minghui Li, Manqiang Liu, Yiyong Zhu, Shiwei Guo, Ning Ling, Qirong ShenAbstractIn context of the use of organic materials as alternatives for mineral fertilizer, it is important to understand how organic amendments influence soil extracellular phosphatase activities which accelerate the mineralization of organic phosphorus (P). To address this, the current study investigates the influence of organic amendments on acid (ACP) and alkaline (ALP) phosphatase activities in soils and how organic amendm...
Source: Soil Biology and Biochemistry - October 20, 2019 Category: Biology Source Type: research

Editorial Board
Publication date: November 2019Source: Soil Biology and Biochemistry, Volume 138Author(s): (Source: Soil Biology and Biochemistry)
Source: Soil Biology and Biochemistry - October 19, 2019 Category: Biology Source Type: research

Microbial utilization of low molecular weight organic carbon substrates in cultivated peats in response to warming and soil degradation
This study provides an important initial step in characterizing the response of the microbial utilization of labile C to temperature change and soil degradation in cultivated peatlands.Graphical abstract (Source: Soil Biology and Biochemistry)
Source: Soil Biology and Biochemistry - October 19, 2019 Category: Biology Source Type: research