A methodological framework to embrace soil biodiversity. (September 2019)

• Record Type: Journal Article
• Authors: Geisen, Stefan; Briones, Maria J.I.; Gan, Huijie; Behan-Pelletier, Valerie M.; Friman, Ville-Petri; de Groot, G. Arjen; Hannula, S.Emilia; Lindo, Zoë; Philippot, Laurent; Tiunov, Alexei V.; Wall, Diana H.
• Is Part Of: Soil biology and biochemistry. Volume 136(2019)
• Publication Date: 2019-09
• Subjects: Microorganisms -- Fauna -- Molecular methods -- Food-webs -- Biodiversity -- Soil functions and health; Soil biochemistry -- Periodicals; Soil biology -- Periodicals; Sols -- Biochimie -- Périodiques; Sols -- Biologie -- Périodiques; Sols -- Microbiologie -- Périodiques; Bodembiologie; Biochemie; 631.46
• DOI: 10.1016/j.soilbio.2019.107536
• Languages: English
• ISSNs: 0038-0717

Abstract

Abstract: Soils host the vast majority of life on Earth including microorganisms and animals, and supporting all terrestrial vegetation. While soil organisms are pivotal for ecosystem functioning, the assemblages of different biota from a taxonomic and functional perspective, as well as how these different organisms interact, remains poorly known. We provide a brief overview of the taxonomic and functional diversity of all major groups of soil biota across different scales and organism sizes, ranging from viruses to prokaryotes and eukaryotes. This reveals knowledge gaps in relation to all soil biodiversity groups, which are especially evident for viruses, protists, micro- and meso-fauna. We review currently-available methods to study the taxonomic and functional diversity of soil organisms by grouping all commonly-used methods into morphological, biochemical and molecular approaches. We list potentials and limitations of the methods to reveal that there is, as yet, no single method to fully characterize the biodiversity even of a single group of soil biota. Yet, we stress that we now have the methods available to enable scientists to disentangle the taxonomic and functional diversity of virtually all soil organisms. We provide a user-friendly guide to help researchers address a wider variety of soil biodiversity in their studies by discussing and critically analysing the various potentials and limitations of diverse methods to study distinct groups of soil life. We highlight that integrative methodological approaches, ideally in collaborative interactions, are key to advancing our understanding of soil biodiversity, such as the combination of morphological and molecular approaches to overcome method-specific limitations. Together, integrative efforts can provide information on the abundance, biomass, diversity and function of several groups of soil biota simultaneously. This newly-obtained integrative information on soil biodiversity will help to define the importance of soil biodiversity in ecosystem processes, functions, and services, and serve to refine food-web and earth system models. Highlights: Soil biodiversity is increasingly studied, yet knowledge remains limited. New methods allow filling key missing knowledge gaps. We provide an overview and guide to the main methods to study soil biodiversity. Integrative method approaches are needed to increase our system-level understanding. Collaborative efforts will uncover soil biodiversity and its functional importance.