Ecosystem type drives soil eukaryotic diversity and composition in Europe

Area of Science:

• Soil ecology
• Eukaryotic community ecology
• Biodiversity research

Background:

• Soil eukaryotes are vital for ecosystem functions, but their diversity drivers are poorly understood.
• Previous studies on soil eukaryotes are limited in spatial scale and taxonomic scope.
• Understanding soil eukaryome composition is crucial for ecosystem management and conservation.

Purpose of the Study:

• To investigate the impact of environmental conditions on soil eukaryome diversity and distribution at a continental scale.
• To identify key factors shaping the community composition and structure of soil eukaryotes across Europe.
• To compare the influence of different ecosystem types and soil properties on soil eukaryotic communities.

Main Methods:

• Analysis of extensive observational data from 787 European sites.
• Assessment of soil eukaryomes including fungi, protists, rotifers, tardigrades, nematodes, arthropods, and annelids.
• Correlation analysis between community composition and various climatic, edaphic, and ecosystem type variables.

Main Results:

• Ecosystem type was the predominant factor shaping soil eukaryote diversity, with croplands exhibiting higher and more specialized communities.
• Soil properties such as pH, plant-available phosphorus, and soil organic carbon to total nitrogen ratio significantly influenced the richness of various eukaryotic groups.
• Overlapping taxa indicated DNA accumulation from past land uses, reflecting recent European land transformations.

Conclusions:

• Long-term environmental variables, rather than short-term measurements, are critical for understanding soil eukaryotic communities.
• Ecosystem type and specific soil properties are key drivers of soil eukaryote diversity and distribution.
• Future monitoring and conservation efforts should incorporate long-term variables and ecosystem type for effective soil health management.