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| Content Provider | frontiers |
|---|---|
| Author | Baveye, Philippe C. Otten, Wilfred Kravchenko, Alexandra Balseiro-Romero, María Beckers, Éléonore Chalhoub, Maha Darnault, Christophe Eickhorst, Thilo Garnier, Patricia Hapca, Simona Kiranyaz, Serkan Monga, Olivier Mueller, Carsten W. Nunan, Naoise Pot, Valérie Schlüter, Steffen Schmidt, Hannes Vogel, Hans-Jörg |
| Abstract | Over the last 60 years, soil microbiologists have accumulated a wealth of experimental data showing that the usual bulk, macroscopic parameters used to characterize soils (e.g., granulometry, pH, soil organic matter and biomass contents) provide insufficient information to describe quantitatively the activity of soil microorganisms and some of its outcomes, like the emission of greenhouse gases. Clearly, new, more appropriate macroscopic parameters are needed, which reflect better the spatial heterogeneity of soils at the microscale (i.e., the pore scale). For a long time, spectroscopic and microscopic tools were lacking to quantify processes at that scale, but major technological advances over the last 15 years have made suitable equipment available to researchers. In this context, the objective of the present article is to review progress achieved to date in the significant research program that has ensued. This program can be rationalized as a sequence of steps, namely the quantification and modeling of the physical-, (bio)chemical-, and microbiological properties of soils, the integration of these different perspectives into a unified theory, its upscaling to the macroscopic scale, and, eventually, the development of new approaches to measure macroscopic soil characteristics. At this stage, significant progress has been achieved on the physical front, and to a lesser extent on the (bio)chemical one as well, both in terms of experiments and modeling. In terms of microbial aspects, whereas a lot of work has been devoted to the modeling of bacterial and fungal activity in soils at the pore scale, the appropriateness of model assumptions cannot be readily assessed because relevant experimental data are extremely scarce. For the overall research to move forward, it will be crucial to make sure that research on the microbial components of soil systems does not keep lagging behind the work on the physical and (bio)chemical characteristics. Concerning the subsequent steps in the program, very little integration of the various disciplinary perspectives has occurred so far, and, as a result, researchers have not yet been able to tackle the scaling up to the macroscopic level. Many challenges, some of them daunting, remain on the path ahead. |
| ISSN | 1664302X |
| DOI | 10.3389/fmicb.2018.01929 |
| Volume Number | 9 |
| Journal | Frontiers in Microbiology |
| Language | English |
| Publisher Date | 2018-08-27 |
| Access Restriction | Open |
| Subject Keyword | Single-cell genomics Upscaling Tomography, X-Ray Computed Soil Microbiology Biodiversity NanoSIMS imaging |
| Content Type | Text |
| Resource Type | Article |
| Subject | Microbiology Microbiology (medical) |
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