Meta-analysis of multidecadal biodiversity trends in Europe

Area of Science:

• Ecology
• Biodiversity Science
• Environmental Change

Background:

• Global biodiversity changes may not directly reflect local trends due to localized environmental processes.
• Understanding local biodiversity dynamics is crucial for effective conservation strategies.

Purpose of the Study:

• To investigate the consistency of local biodiversity trends across European biogeoregions, realms, and taxonomic groups.
• To determine the correlation between local biodiversity changes and regional climate and habitat conditions.

Main Methods:

• Analysis of 161 long-term biological time series (15-91 years) from Europe.
• Comprehensive dataset covering approximately 6,200 marine, freshwater, and terrestrial taxa.
• Statistical testing for consistency of trends and correlation with environmental factors.

Main Results:

• Local biodiversity trends (abundance, richness, diversity) are inconsistent across biogeoregions, realms, and taxonomic groups.
• Species richness and abundance increased with rising temperatures and habitat naturalness.
• A distinct spatial pattern of community composition changes (temporal taxonomic turnover) was observed in Northern and Eastern Europe.

Conclusions:

• Local biodiversity changes are complex and cannot be universally generalized.
• Climate and local habitat conditions significantly influence biodiversity trends.
• Spatial variations in biodiversity responses highlight the need for region-specific conservation approaches.