Plant cover and epipedon SOM stability as factors affecting brown soil profile development and microbial activity

Antisari, Livia Vittori; Marinari, Sara; Dell’Abate, Maria Teresa; Baffi, Claudio; Vianello, Gilmo

doi:10.1016/j.geoderma.2010.12.021

Cited by 24 publications

(15 citation statements)

References 72 publications

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“…Water is an indispensable substance for life and can directly affect reproductive or metabolic processes, and indirectly influence the ecological niches of local microorganism or their physiological status (Skopp, Jawson & Doran, 1990; Liu et al, 2010). In addition, Christian et al (2008), Antisari et al (2011) and Ludwig et al (2015) confirmed that soil SOM is an essential energy source for microbial activities including reproduction. In general, our research considered substrate variables as well as soil properties and environmental factors based on niche theory, but further studies on the relationship between geographic isolation or other factors and eukaryotic groups will be conducted in the future.…”

Section: Discussionmentioning

confidence: 76%

Drivers and assemblies of soil eukaryotic microbes among different soil habitat types in a semi-arid mountain in China

Zhao

Zhang

et al. 2018

PeerJ

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The effects of environmental and species structure on soil eukaryotic microbes inhabiting semi-arid mountains remain unclear. Furthermore, whether community assembly differs in a variety of soil habitat types, for example, artificial forest, artificial bush, farmland, and natural grassland, is not well understood. Here, we explored species diversity and composition of soil eukaryotic microbes south of the Taihang Mountains (mid-western region of China) using Illumina sequencing of the 18S rRNA gene (V4) region on the MiSeq platform. The results suggest that the forest soil habitat type improved the diversity and abundance of soil eukaryotic microbes that will benefit the restoration of degraded soil. The SAR (Stramenopiles, Alveolates, Rhizaria) supergroup and Metazoa were the dominant soil eukaryotic microbial groups at the phylum level. About 26% of all operational taxonomic units were common among the different soil habitat types. The O-elements, water content, soil organic matter, and elevation significantly influenced the abundance of soil eukaryote communities (P < 0.05). Our findings provide some reference for the effectiveness of local ecological restoration and the establishment of a soil eukaryotic microbe resource databases in a semi-arid area.

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Section: Discussionmentioning

confidence: 76%

Drivers and assemblies of soil eukaryotic microbes among different soil habitat types in a semi-arid mountain in China

Zhao

Zhang

et al. 2018

PeerJ

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“…Furthermore, accumulated carbon in the topsoil of undisturbed soils remains in a state of dynamic equilibrium with the plant community, which favors the additional protection of its resources, depending on type and age of plant communities (Dinghua et al 2001;Maryganova et al 2010). Older trees produce more organic matter, which can be a potential reason for an increased rate of fulvic acids (Antisari et al 2011). The amounts of humic versus fulvic acids depend on tree species, soil properties as well as weather conditions, which predict the direction of humification processes.…”

Section: Resultsmentioning

confidence: 99%

Mutual relations between PAHs derived from atmospheric deposition, enzymatic activity, and humic substances in soils of differently urbanized areas

et al. 2018

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Purpose The aim of this study was to determine the mutual relations between polycyclic aromatic hydrocarbons (PAHs) originated from atmospheric emissions and enzymatic activity and humic substances in soils at differently urbanized area, on an example of the Lublin city, east Poland. Materials and methods The chosen areas represented three differently urbanized environments: old tenement houses and modern residential blocks, mixture of different building and rural landscape, and typical rural environment with smallholding farms, respectively. On each of the urban, suburban, and rural areas, one representative plot was chosen on fallow lands classified as luvisol derived from loess. The soil samples were collected from the top 25 cm layer. The following properties were determined: pH, organic carbon, total nitrogen, humic and fulvic acids, PAHs content (14 PAHs from US EPA list), and the activities of the following enzymes: dehydrogenases, acid phosphatase, alkane phosphatase, protease, and urease. Results and discussion Higher contents of organic C and total N were found in the rural soil samples. The share of humic acid was similar in all soils investigated, ranging from 19.38 to 25.27%, while fulvic acid values differ significantly between urban and rural areas. The urban soils indicated much lower share of fulvic acids (9.78-10.99%) than those of rural (29.02-29.32%). Consequently, the values of the C HA :C FA ratio of the urban soil were approximately two times higher than those of the rural soil. The results showed that both the rate of humification and the activity of dehydrogenases, acid phosphatase, alkaline phosphatase, and proteases in the soils increased in the following sequence: urban < suburban < rural. Conclusions The results showed that an increase of PAHs in the urbanized areas affect other soil properties. The phenanthrene/ anthracene and fluoranthene/pyrene ratios pointed to coal combustion as the principal source of PAHs in the investigated soils. The PAH content in the urbanized area inhibit humification processes in the soil and the activity of dehydrogenases, acid phosphatase, alkaline phosphatase, and proteases.

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“…The cation exchange capacity (CEC) was determined after exchange with 0.05 N cobalthexamine chloride solution [29,30]. The exchange acidity was determined in KCl 1 M. The total element concentrations were measured by Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES, Ametek, Spectro Analytical Instruments, Kleve, Germany) after HNO 3 :HCl (1:3 v:v, suprapure Merck, Kenilworth, NJ, USA) microwave digestion of samples [14]. The amount of amorphous Al and Fe oxides, extracted with acid ammonium oxalate [31] allowed us to calculate the spodicity index (SI) [13] as Alo + 1/2Feo.…”

Section: Oc Stock (T Hamentioning

confidence: 99%

“…Moreover, the plant cover affects the soil profile development of Cambisols with different expressions of the eutric qualifier [13] through changes of SOM stability and soil pH [14]. However, little is known about the effect of exotic species age, such as Douglas fir, on soil processes involved in carbon sequestration and nutrient dynamics, as well as on the biogeochemical cycle of elements along soil profiles [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of Douglas Fir Stand Age on Soil Chemical Properties, Nutrient Dynamics, and Enzyme Activity: A Case Study in Northern Apennines, Italy

Antisari

Papp

Vianello

et al. 2018

Forests

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The aim of this study was to determine the effect of a Douglas fir plantation along a stand chronosequence in the North Apennine (Italy) on soil carbon and nitrogen stocks, as well as on soil chemical and biochemical properties involved in the nutrients biogeochemical cycle. In 2014, three sites of Douglas fir stands, aged 80, 100, and 120 years, were selected in Vallombrosa forest to study the dynamics of soil nutrients in the ecosystem. Along the Douglas fir chronosequence, general evidence of surface element accumulation was found, including a conspicuous increase of alkaline element with respect to Al, which was attributed to the increase of soil pH along the Douglas fir stand age classes. A general increase of specific enzyme activity (per unit of organic carbon) and functional diversity were observed in the epipedon of the Douglas fir stand over 100 years of age. Moreover, the (chitinase + leucine aminopeptidase) to acid phosphatase ratio progressively increased from 0.15 to 0.31 in the epipedon of the chrononsequence, while the β-glucosidase to (chitinase + leucine aminopeptidase) ratio decreased from 1.45 to 0.83, suggesting nitrogen limitation with respect to carbon. In fact, the soil carbon stock progressively increased along the chronosequence, in the epipedon from 17 to 53 Mg C ha−1 and in the endopedon from 17 to 37 Mg C ha−1. Conversely, the soil nitrogen stock increased from 1.2 to 2.4 Mg N ha−1, but not over the 100-year-old stand class. In conclusion, soil organic matter accumulation became sufficient to define the umbric horizon in the Northern Apennines when the Douglas fir plantation reached the age of 100 years. Over this age class of plants, a limitation of soil nitrogen may occur, affecting enzyme activities regulating the biogeochemical cycle of nutrients.

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Plant cover and epipedon SOM stability as factors affecting brown soil profile development and microbial activity

Cited by 24 publications

References 72 publications

Drivers and assemblies of soil eukaryotic microbes among different soil habitat types in a semi-arid mountain in China

Drivers and assemblies of soil eukaryotic microbes among different soil habitat types in a semi-arid mountain in China

Mutual relations between PAHs derived from atmospheric deposition, enzymatic activity, and humic substances in soils of differently urbanized areas

Effects of Douglas Fir Stand Age on Soil Chemical Properties, Nutrient Dynamics, and Enzyme Activity: A Case Study in Northern Apennines, Italy

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