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Applied Soil Ecology
Elsevier Science B.V.
Applied Soil Ecology

Elsevier Science B.V.

0929-1393

Applied Soil Ecology/Journal Applied Soil EcologySCIISTP
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    Heterogeneity and its drivers of microbial communities and diversity in six typical soils under two different land uses in tropical and subtropical southern China

    Ji H.Wei H.Wang R.Zhang J....
    10页
    查看更多>>摘要：? 2022 Elsevier B.V.Soil microenvironment is a combination of climate, biological matter, and earth parent material, which has unique characteristics and is considered to have distinctive microbial resources. In this study, we collected soil samples from farmland and woodland of six soil types in southern China to explore the soil microbial structure and functional characteristics of different soil types and land use via a high-throughput sequencing technology. The soil microbial composition was greatly affected by soil types (Adonis, P < 0,001) and land-use types (Adonis, P < 0,01). Furthermore, the network analysis indicated the different interaction patterns of soil microbial communities in different soil types. The keystone taxa identified by the network analysis were highly correlated soil N, S, and P-cycle, and soil microbial correlation may link to activation of soil functional profile. Edaphic variables such as soil pH and total phosphorus (TP) had contrasting effects on microbial diversity. The results further highlighted the importance of the niche-based habitat and function-oriented control on the structure of six typical soil microbial communities under two different land uses in southern China.
      原文链接:
    • NSTL
    • Elsevier

    Forest density and edge effects on soil microbial communities in deciduous forests across Europe

    Vangansbeke P.De Frenne P.Verheyen K.Boeckx P....
    10页
    查看更多>>摘要：? 2022Forest fragmentation increases the proportion of edge area and this, in turn, induces changes in forest structure, species composition and microclimate. These factors are also strongly determined by the forest management regime. Although the interactive effects of edges and density on forest plant communities have been extensively studied, little is known about the response of the belowground communities. Here we investigated the variation of soil microbiota in 45 deciduous broadleaved forests along a latitudinal gradient from Italy to Norway at a continental scale across Europe. Phospholipid fatty acid (PLFA) and neutral lipid fatty acid (NLFA) were used to map the microbial community in the forest edge and interior across three forest densities (dense, intermediate, open forest). Microbial community composition was only affected by forest edge effects and not by forest density. We did not find any interaction effects between forest density and distance-to-edge. Arbuscular mycorrhizal fungi (AMF) were significantly more abundant in edges and Gram-negative bacteria more abundant in interiors, respectively. The microbial community composition was closely related to soil pH, soil potassium and nitrogen, texture (percent sand) and soil temperature. Soil pH was positively correlated with the saprotrophic fungi and potassium was positively correlated with Gram-negative bacteria but negatively correlated with Actinobacteria. In sum, we reveal the notable effects of forest edges on the soil AMF abundance. This result indicated that AMF could possess a stronger affinity with species growing in the edges, which may help to improve plant performance under hostile conditions herein.
      原文链接:
    • NSTL
    • Elsevier

    Introduction of earthworms into mycorrhizosphere of white clover facilitates N storage in glomalin-related soil protein and contribution to soil total N

    Liu R.-C.Meng L.-L.Zou Y.-N.Wu Q.-S....
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.Either arbuscular mycorrhizal (AM) fungi or earthworms as soil organisms promote plant growth, while their interaction on nitrogen (N) content in plants, soil, and glomalin-related soil protein (GRSP) is not known. In this study, an AM fungus (Funneliformis mosseae) and an earthworm (Pheretima guillelmi), either in single or in combination, were introduced into soil growing white clover to analyze their effects on plant growth, chlorophyll, soluble protein, N contents in leaves, roots, GRSP, and soil, and the contribution of N in purified GRSP to soil total N. The four-week introduction of earthworms significantly increased root mycorrhizal colonization rate, and accelerated an improved AM effect on chlorophyll and plant growth. The single introduction of earthworms significantly increased root N and soil total N contents, while the single introduction of AM fungi distinctly elevated N contents in leaves, roots, easily extractable GRSP, and soil (nitrate N and total N). The N in total GRSP was 5.78–7.70 mg g?1, accounting for 3.46 %–5.45 % of the soil total N, of which the contribution of N from easily extractable GRSP and difficult-to-extract GRSP was 1.84 %–3.07 % and 1.34 %–2.39 %, respectively. AM fungi, but not earthworms, significantly increased the contribution of N in GRSP to soil total N, and the introduction of earthworms further accelerated the increased effect of mycorrhizas on the contribution of N in easily extractable and total GRSP to soil total N. These results demonstrated that the introduction of earthworms into mycorrhizosphere can facilitate N storage in GRSP and thus a contribution to soil total N.
      原文链接:
    • NSTL
    • Elsevier

    Extracellular enzyme stoichiometry reflects the metabolic C-and P-limitations along a grassland succession on the Loess Plateau in China

    Liu C.Zhou Z.Wanek W.Xue Z....
    12页
    查看更多>>摘要：? 2022Soil extracellular enzyme stoichiometry (EES) reflects the biogeochemical balance between microbial metabolic requirements and environmental nutrient availability. Recent research suggests that EES well effect on soil microbial metabolic limitations (SMMLs), however, few field studies have explicitly tested this based on a herbaceous successional chronosequence. We used the EES models to identify the response of SMMLs, and investigated the potential implications of microbial nutritional limitations across the time series (herbaceous succession) and space (transformation interface soil [TIS] and underlying topsoil [UTS] layer) in the grassland restoration series. We show that soil microorganisms were generally limited by C, both in the TIS and UTS. Microbial C-limitation exhibited a unimodal direction, peaking in intermediate successional stages, however, P-limitation presented the opposite trend. During herbaceous succession, microbial P-limitation was more substantial than that in N-limitation. SMMLs gradually transferred from P- to N- and back to P-limitation at later successional stages in the TIS layer. Furthermore, we demonstrate that biotic factors, soil basic index, and soil nutrients explained 92.2 % of the variations in microbial C-limitation and 84.4 % of the variations in microbial P-limitation. Multi–interaction factors exhibited the most significant relative influences of 65.11 % (TIS) and 43 % (UTS) on the SMMLs. Microbial C-limitation was induced by the imbalance between C supply and microbial C demand, whereas the changes in microbial P-limitation were due to the changes in the competition for P between plants and microorganisms. Overall, our findings provide support for microbial C- and P-limitation in the process of herbaceous succession during the restoration. We also highlight the possibility of additive effects on soil SMMLs via interactions of vegetation composition, soil properties, and microbial nutritional demands, which might constrain soil microbial metabolism requirements despite greater living root and litter resource inputs.
      原文链接:
    • NSTL
    • Elsevier

    Landscape management alters relationships between edaphic conditions, bacterial diversities, and nitrogen-cycling traits

    Zhang C.Wei G.Shu D.
    9页
    查看更多>>摘要：? 2022 Elsevier B.V.Urbanization has dramatic effects on riparian ecosystem functioning. China implemented ecological restoration through the landscape construction of riverside green spaces. Soil microbiome restoration is key to the recovery of riverside ecosystem functioning. However, it remains unknown how restoration strategies affect biodiversity-function relationship. Here we examined bacterial communities and functional profiles using high-throughput sequencing, quantitative polymerase chain reaction in adjacent pairs of landscaped and undeveloped riparian green spaces. We also explored how soil properties, bacterial communities, and functions interact using structural equation modeling. Results showed that the landscaped system had higher soil nutrients and moisture, and more uniform bacterial alpha and beta diversity than the undeveloped system. Landscaped systems harbored more abundant denitrification genes, while undeveloped systems had more abundant nitrification genes. In the landscaped system, bacterial alpha diversity is independent of soil factors and negatively correlated with multiple nitrogen-cycling processes. In resource-limited undeveloped system, bacterial alpha diversity negatively responded to soil nutrients, but positively affected nitrification. Moreover, soil nutrients negatively and positively impacted denitrification and dissimilatory nitrate reduction to ammonium (DNRA), respectively in the undeveloped system. In the landscaped system, high soil moisture promoted denitrification and anammox (anaerobic ammonium oxidation), which contributed to nitrogen loss. Collectively, landscape management influenced bacterial diversity, function, and their relationship by altering soil resource.
      原文链接:
    • NSTL
    • Elsevier

    Detection of biofilm and planktonic microbial communities in litter/soil mixtures

    Malinska H.A.Gryndler M.Hujslova M.Hrselova H....
    11页
    查看更多>>摘要：? 2022 Elsevier B.V.Microbial community of the soil can be subdivided into a planktonic community of motile organisms and a community of sessile organisms, including those constituting biofilms on physical surfaces of different texture. Biofilm communities on surfaces of organic particles represent a crucial factor involved in decomposition of plant litter and soil particulate organic matter in general. In spite of their great ecological importance, the composition of soil biofilm communities is only scarcely studied due to methodological problems connected with distinguishing biofilm inhabitants from other soil organisms. In this study, we were able to distinguish microbial communities colonizing four compartments of the experimental system: particles of the litter/soil mixture, biofilms on adjacent smooth or fibrous glass surfaces, and plankton. Existence of different preferences of microbial operational taxonomic units (OTUs) to occupy the experimental compartments has been suggested on the basis of their relative abundance in the community. Three main OTU groups have been defined according to these preferences. They are tentatively termed generalists, OTUs corresponding to organisms preferring the litter particles and OTUs corresponding to selective organisms discriminating between different surface types. At the same time, temperature has been identified as a factor influencing the switching between preferences of organisms for experimental compartments. Our work contributes to the description of the spatial microscale distribution of microorganisms in soil containing decomposing organic matter.
      原文链接:
    • NSTL
    • Elsevier