Soil is a vital natural resource that serves as a foundation for ecosystems, agricultural production, and biodiversity. Understanding soil characteristics is essential for effective land management, conservation efforts, and sustainable agricultural practices.
We are studying various types of soil with distinct characteristics to reach our goals. Our aim is to generate new insights about the functions and services of soil ecosystems, as well as to create new indicators, tools, and incentives for identifying and monitoring the crucial soil organisms that play a key role in providing ecosystem services in European land uses.
This campaign not only aims to catalog and understand the diverse soil types across these regions but also seeks to examine the implications of human activity and climate change on soil health and biodiversity. By comparing these five experimental sites, we aim to highlight the complex connection between soil characteristics, land use, and environmental conditions, thereby contributing to a more comprehensive understanding of soil ecology and its crucial role in sustaining life on Earth.
Experimental Sites
Soil Characteristics: The soils are characterized by low moisture levels, low organic matter content, and a weak soil structure. These soils are highly susceptible to erosion, resulting in limited vegetation growth.
Land Use: The area is marked by diverse land uses, including agriculture, urban development, and natural landscapes.
Climate Influence: Recent trends show a reduction in precipitation and an increase in temperature, which significantly affects soil health and biodiversity.
Soil Characteristics: The soils include Cambisols and Technosols, which exhibit weak horizon differentiation. Soil texture varies according to the underlying rock formations, ranging from loamy to sandy-loamy.
Land Use: Land use is varied, including agricultural fields, semi-natural areas, forests, and urban zones, heavily impacted by human activities like farming and urbanization.
Climate Influence: Soil compaction from heavy machinery and fertilizers has altered the soil structure and fertility.
Soil Characteristics: The soils in the Alpine region are generally shallow on mountain slopes, while deeper, fertile alluvial soils are found in valleys. These alluvial soils are influenced by river dynamics and erosion processes.
Land Use: The valleys are used for agriculture, while mountainous areas are less accessible and predominantly natural.
Climate Influence: The region faces unpredictable weather, including above-average precipitation and snowfall, which pose significant challenges for sampling.
Soil Characteristics: Soil conditions range from high-intensity agricultural use to partially restored mining areas and abandoned semi-natural lands. Soils include regosols in agricultural areas, particularly vineyards, and technosols in quarry and urban environments.
Land Use: Land use is varied, from vineyards with varying intensities of pesticide use to mining soils with different levels of human impact, semi-natural abandoned soils, and urban soils impacted by human activities.
Climate Influence: The region is characterized by a transition zone between oceanic and continental climate zones, with wet winters and rainfall concentrated during winter and spring. Other factors include high soil moisture and compaction issues due to winter rainfall.
Soil Characteristics: Soils include peat, gley, and podzol types, with peat soils having a thick organic layer influenced by surface water. Histosols dominate in wetlands and forests, consisting of peat and decomposed organic matter, sensitive to drainage and human activity.
Land Use: Land use varies from wetlands and semi-natural areas to forests, mining, and agricultural lands, with different levels of human impact.
Climate Influence: The boreonemoral climate promotes peat formation with precipitation exceeding evaporation. Drainage systems threaten peat soils by increasing oxygenation, leading to degradation and compaction.
Main challenges
The campaign included 25 experimental sites across five biogeographic regions, making it stand out due to the wide range of areas included in the study. The variety allows us to assess pressures and drivers, adaptation capacity, and resilience to climate change, as well as to better understand ecosystem services. At the same time, it brings different challenges depending on the climate and soil conditions. The primary challenges faced were:
Flood
Widely distributed rainfall throughout the winter and part of the spring caused too much soil moisture in the Atlantic Region.
Draught
The reduction in precipitation and the increase in temperature posed a challenge in the Mediterranean region.
Types of soil
Some of the semi-natural sites are characterized by very stony and shallow soils, which made sampling difficult. It was not always possible to push the auger with the plastic liner to a depth of 30 cm.
Atypical weather conditions
Spontaneous adaptation to changing situations, such as untypical season-long weather conditions (above-average precipitation rates, below-average temperature, including snowfall and frost), was challenging in the Alpine Region. Unexpected storms posed a challenge in the Boreal region.
Slopes
Steep slopes presented a significant challenge for the team, impacting the transportation of the sampling equipment, water, chemicals, and samples collected.
Key Differentiators
This soil sampling campaign differs from previous campaigns in several key ways across all regions:
Scale and Scope: The campaign is notably larger than prior efforts, involving a significantly greater number of samples and analyses.
Sample Diversity: Unlike previous campaigns that may have focused on specific soil types or organisms, this campaign requires collecting various sample types (soil structure, microbial samples, mesofauna, macrofauna) at each sampling point.
Land Use Representation: The campaign encompasses a wide range of land uses, including agricultural, semi-natural, forest, urban, and mining areas, each with varying intensities of human impact. This diversity in land use necessitates careful site selection and consideration of specific challenges posed by each environment.
Climate Change Focus: This campaign is distinguished by its integration of climate change experiments, particularly in the Boreal and Alpine regions. These experiments aim to assess the impact of altered precipitation and temperature on soil properties and biodiversity.
Team Expertise: The campaign demands a highly multidisciplinary team with expertise in soil sampling, processing, and analysis across various disciplines. This requires extensive coordination and the ability to adapt to unforeseen challenges in the field.
