Rome - Expanding efforts to measure, monitor and protect soil biodiversity around the world will intensify further with the establishment of the Global Soil Biodiversity Observatory, to be led by the Food and Agriculture Organization of the United Nations (FAO) and serving as a global reference for scientific collaboration and policy design.
The Global Soil Biodiversity Observatory (GLOSOB) was launched by FAO at the COP15, where signatories adopted the Convention of Biological Diversity's 2020-2030 plan of action. This plan calls for systematic assessment and monitoring of soil biodiversity to aid implementation of the Kunming Montreal Global Biodiversity Framework (KM-GBF).
While various knowledge-sharing platforms and initiatives have been launched, there is currently a lack of standardized monitoring protocols and actionable strategies for integrating soil biodiversity into policy and national monitoring frameworks, according to Jacob Parnell, the lead author of a new comment in Nature Ecology and Evolution (freely available until 14 August). This commentary outlines the goals of the new Observatory and its top-down coordinating role, which includes working with a suite of bottom-up networks already involved in the project.
Considerable work has been done in this emergent field, which has highlighted the extensive efforts needed to fill research gaps, expand global coverage, and, above all, strengthen national monitoring capacities to support the global effort.
Soil biodiversity is clearly linked to agricultural soil fertility which supports the growth of key food crops, and the biotic communities living in harsh or unproductive farmlands - like hyper-arid, acidic or waterlogged areas - have an important function as genetic reservoirs. Yet, many of these below-ground biodiversity hotpots fall outside above-ground protected areas protected or areas under conservation. Major risks to soil biodiversity stem from extreme climate events, land degradation, deforestation, invasive species and pollution.
Stronger indicators, more labs and training
A core GLOSOB objective is to define improved soil biodiversity indicators - tracking essential biodiversity variables (EBVs) on both taxonomic and functional planes - and build capacity to validate policy agendas aimed at conservation and sustainable management practices, according to Parnell.
Currently, there is reasonable data on the distribution of microbial soil carbon and of the soil macrofauna community - both of which highlight soil quality issues - but the evidence base gets thinner beyond earthworms, nematodes and common bacterial species. GLOSOB is designed as a tiered system to allow for steady expansion of measurement capacities to extend from soil chemical properties, enzymatic activities and to tracking decomposition patterns using leaf litter bags and steadily increasing to more complex nutrient cycling components and on to intraspecific microbial genetic diversity through shotgun metagenomic sequencing.
Knowing more will require investments in laboratory facilities, training programmes and standardized monitoring frameworks that enable all countries to collect, analyze and properly interpret soil biodiversity data. Another key step is to integrate biodiversity considerations into conventional soil surveys and national soil information systems.
Building on FAO's legacy
FAO already leads the Global Soil Partnership, which held its 13th Plenary Assembly last June. It serves as a hub for other initiatives and has catalyzed successful conservation projects such as the Soil Doctors and Recarbonization of Global Agricultural Soils (RECSOIL).
