Soil textural heterogeneity impacts bacterial but not fungal diversity

Seaton, Fiona M.; George, Paul B. L.; Lebron, Inma; Jones, Davey L.; Creer, Simon; Robinson, David A.

doi:10.1016/j.soilbio.2020.107766

Cited by 114 publications

(75 citation statements)

References 68 publications

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“…Seaton et al . ( 2020 ) further showed that fungi are less constrained by their physical environment compared with bacteria, which might be related to the hyphal system that allows them to bridge dry pore spaces (Tecon and Or 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture

Kundel

Bodenhausen

Jørgensen

et al. 2020

FEMS Microbiology Ecology

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Drought and agricultural management influence soil microorganisms with unknown consequences for the functioning of agroecosystems. We simulated drought periods in organic (biodynamic) and conventional wheat fields and monitored effects on soil water content, microorganisms and crops. Above the wilting point, water content and microbial respiration were higher under biodynamic than conventional farming. Highest bacterial and fungal abundance were found in biodynamically managed soils, and distinct microbial communities characterised the farming systems. Most biological soil quality parameters and crop yields were only marginally affected by the experimental drought, except for arbuscular mycorrhizal fungi (AMF), which increased under the experimental drought in both farming systems. AMF were further strongly promoted by biodynamic farming resulting in almost three times higher AMF abundance under experimental drought in the biodynamic compared to the conventional farming system. Our data suggest an improved water storage capacity under biodynamic farming and confirms positive effects of biodynamic farming on biological soil quality. The interactive effects of the farming system and drought may further be investigated under more substantial droughts. Given the importance of AMF for the plant's water supply, more in-depth studies on AMF may help to clarify their role for yields under conditions predicted by future climate scenarios.

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Section: Discussionmentioning

confidence: 99%

Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture

Kundel

Bodenhausen

Jørgensen

et al. 2020

FEMS Microbiology Ecology

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“…Since the study of Kandeler et al (2019) used the same mineral container composition as did the current study, but with root litter as the complex C-source, the dominance of fungi during initial colonization of mineralization seems to be independent of resource quality. The importance of the physical environment's impact on microorganisms with different life history strategies was also illustrated by Tecon and Or (2017) as well as Seaton et al (2020). Due to their hyphal growth, fungi can actively grow toward new food sources (Fukasawa et al 2019), while bacteria are strongly limited in individual movement at the centimeter scale (Abu-Ashour et al 1998).…”

Section: Mineral Colonization and Resource Usementioning

confidence: 99%

“…For example, microarthropods could not feed on fungal hyphae in the mineralosphere; this, in turn, could have modified C cycling (Crotty and Adl 2019;Pausch et al 2015Pausch et al , 2018. It was beyond the scope of this paper to additionally explore the importance of trophic interactions and soil physics (such as particle size distribution, pore geometry, connectivity, and hydration status) to microbial colonization and C use in the mineralosphere (Seaton et al 2020). Nevertheless, our approach can be extended to study the importance of physical structure of minerals and soils to trophic interactions in the mineralosphere (Erktan et al 2020).…”

Section: Interaction Of the Mineralosphere With Their Environmentmentioning

confidence: 99%

“…The survival and functioning of soil microorganisms in terrestrial ecosystems depend on interactions between biotic and abiotic (chemical and physical) components of the soil (Erktan et al 2020;Seaton et al 2020). Whereas the colonization of some microhabitats, such as the rhizosphere, detritusphere, and drilosphere, is well studied under natural environmental conditions (Hünninghaus et al 2019;Johnson-Maynard and Strawn 2016;Poll et al 2008), studies of the microbial life associated with minerals are rare.…”

Section: Introductionmentioning

confidence: 99%

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The mineralosphere—interactive zone of microbial colonization and carbon use in grassland soils

et al. 2021

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To improve our understanding of early microbial colonization of pristine minerals and their group-specific C utilization, we exposed minerals (illite/goethite/quartz) amended with artificial root exudates (ARE, glucose, and citric acid) in grassland soils for a period of 24 weeks. FTIR spectra indicated that mineral-associated ARE were used within the first 2 weeks of exposure and were replaced by other carbohydrates derived from living or dead cells as well as soil-borne C sources transported into the mineralosphere after heavy rain events. Fungi and Gram-positive bacteria incorporated ARE-derived C more rapidly than Gram-negative bacteria. Gram-negative bacteria presumably profited indirectly from the ARE by cross-feeding on mineral-associated necromass of fungi and Gram-positive bacteria. The Gram-negative bacterial phyla Verrucomicrobia, Planctomycetes, Gemmatimonadetes, Armatimonadetes, and Chloroflexi showed a positive correlation with Gram-negative PLFA abundances. After 24 weeks of exposure in the grassland soils, abundances of soil microorganisms in the mineralosphere reached only 3.1% of the population density in soil. In conclusion, both bacteria and fungi slowly colonize new surfaces such as pristine minerals, but quickly assimilate artificial root exudates, creating an active microbial community in the mineralosphere.

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“…In terms of soil particle size, soil textural heterogeneity was found to be positively linked to bacterial richness for the first time (Seaton et al, 2020b) but fungal richness was not directly impacted by soil texture. Both bacterial and fungal community composition were impacted by the textural composition of the soil.…”

Section: Additional Published Work To Datementioning

confidence: 92%

Integrated ecological monitoring in Wales: the Glastir Monitoring and Evaluation Programme field survey

Wood¹,

Alison²,

Botham³

et al. 2021

Preprint

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Abstract. The Glastir Monitoring and Evaluation Programme (GMEP) ran from 2013 until 2016, and was probably the most comprehensive programme of ecological study ever undertaken at a national scale in Wales. The programme aimed to (1) set up an evaluation of the environmental effects of the Glastir agri-environment scheme and (2) quantify environmental status and trends across the wider countryside of Wales. The focus was on outcomes for climate change mitigation, biodiversity, soil and water quality, woodland expansion and cultural landscapes. As such, GMEP included a large field survey component, collecting data on a range of elements including vegetation, land cover and use, soils, freshwaters, birds and insect pollinators from up to 300 1 km squares throughout Wales. The field survey capitalised upon the UKCEH Countryside Survey of Great Britain, which has provided an extensive set of repeated, standardised ecological measurements since 1978. The design of both GMEP and the UKCEH Countryside Survey involved stratified-random sampling of squares from a 1 km grid, ensuring proportional representation from land classes with distinct climate, geology and physical geography. Data were collected from different land cover types and landscape features by trained professional surveyors, following standardised and published protocols. Thus, GMEP was designed so that surveys could be repeated at regular intervals to monitor the Welsh environment, including the impacts of agri-environment interventions. One such repeat survey is scheduled for 2021 under the Environment and Rural Affairs Monitoring and Modelling Programme (ERAMMP). Data from GMEP have been used to address many applied policy questions, but there is major potential for further analyses. The precise locations of data collection are not publicly available, largely for reasons of landowner confidentiality. However, the wide variety of available datasets can be (1) analysed at coarse spatial resolutions and (2) linked to each other based on square-level and plot-level identifiers, allowing exploration of relationships, trade-offs and synergies. This paper describes the key sets of raw data arising from the field survey at co-located sites, 2013 to 2016. Data from each of these survey elements are available with the following Digital Object Identifiers. Landscape features, https://doi.org/10.5285/82c63533-529e-47b9-8e78-51b27028cc7f, https://doi.org/10.5285/9f8d9cc6-b552-4c8b-af09-e92743cdd3de, https://doi.org/10.5285/f481c6bf-5774-4df8-8776-c4d7bf059d40; Vegetation plots, https://doi.org/10.5285/71d3619c-4439-4c9e-84dc-3ca873d7f5cc; Topsoil physico-chemical properties, https://doi.org/10.5285/0fa51dc6-1537-4ad6-9d06-e476c137ed09; Topsoil meso-fauna, https://doi.org/10.5285/1c5cf317-2f03-4fef-b060-9eccbb4d9c21; Topsoil particle size distribution https://doi.org/10.5285/d6c3cc3c-a7b7-48b2-9e61-d07454639656; Headwater stream quality metrics, https://doi.org/10.5285/e305fa80-3d38-4576-beef-f6546fad5d45 ; Pond quality metrics, https://doi.org/10.5285/687b38d3-2278-41a0-9317-2c7595d6b882; Insect pollinator and flower data, https://doi.org/10.5285/3c8f4e46-bf6c-4ea1-9340-571fede26ee8; Bird counts, https://doi.org/10.5285/31da0a94-62be-47b3-b76e-4bdef3037360.

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Soil textural heterogeneity impacts bacterial but not fungal diversity

Cited by 114 publications

References 68 publications

Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture

Effects of simulated drought on biological soil quality, microbial diversity and yields under long-term conventional and organic agriculture

The mineralosphere—interactive zone of microbial colonization and carbon use in grassland soils

Integrated ecological monitoring in Wales: the Glastir Monitoring and Evaluation Programme field survey

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