Holocene Climate Impact on Mediterranean Vegetation Dynamics

The Holocene epoch has witnessed a dynamic interplay between climate variability and the rich mosaic of Mediterranean vegetation. Fluctuations in temperature, precipitation and seasonality have driven shifts from closed mixed oak and pine forests to more open shrub‐and‐grass landscapes, punctuated by episodes of drought and enhanced fire activity. Marine and terrestrial pollen records, lake‐sediment studies and charcoal analyses jointly reveal centennial to millennial trends towards summer aridification interrupted by wetter intervals linked to changes in insolation, atmospheric circulation and sea‐surface temperatures. These environmental oscillations have not only moulded plant distributions and biodiversity hotspots but also influenced soil development, carbon sequestration and water resources in the region. Moreover, human land‐use practices, from Neolithic agroforestry to recent fire suppression and irrigation, have intertwined with natural drivers to shape contemporary vegetation patterns. Understanding these past dynamics is crucial for anticipating vegetation responses under ongoing warming, guiding conservation of endemic taxa, informing sustainable land management and mitigating fire risk across this globally significant biome.

Research from Nature Portfolio

Recent studies have compiled pollen and hydrological records to reconstruct Western Mediterranean drought recurrence during the Early Middle Ages, identifying major dry intervals between 450 and 950 CE that correlate with agricultural collapse and socio‐political unrest. In parallel, high‐resolution palaeolimnological investigations of high‐altitude Pyrenean lakes document unprecedented increases in organic carbon and lithogenic fluxes since the mid‐20th century, signalling intensified erosion, nutrient loading and algal productivity under warmer temperatures. Together, these findings underscore the acute sensitivity of Mediterranean ecosystems to both natural climatic swings and the accelerated changes of the Great Acceleration era, highlighting the need to integrate palaeoenvironmental baselines into future impact assessments.

Holocene Climate Impact on Mediterranean Vegetation Dynamics publication trend

The graph below shows the total number of articles in holocene climate impact on mediterranean vegetation dynamics across all publications each year (not limited to Nature Index journals).

Technical terms

Holocene: The geological epoch spanning the last ~11 700 years, during which current climatic and ecological systems formed.

Pollen analysis: The examination of fossil pollen grains to reconstruct past vegetation composition and environmental conditions.

Palaeolimnology: The study of ancient lakes through sediment cores to infer historical climate and ecological changes.

Hydroperiod: The seasonal pattern and duration of water presence in wetlands or lakes, affecting plant communities.

MaxEnt model: A maximum entropy algorithm used to predict species’ potential distributions based on environmental variables.

Anthropogenic management: Human interventions in ecosystems, including land use, water regulation and fire suppression strategies.

References

1. Drought as a possible contributor to the Visigothic Kingdom crisis and Islamic expansion in the Iberian Peninsula. Nature Communications (2023).
2. Hydrological modelling and evolution of lakes and playa-lakes in southern Spain constrained by geology, human management and climate change. The Science of The Total Environment (2023).
3. Modelling Mediterranean oak palaeolandscapes using the MaxEnt model algorithm: The case of the NE Iberia under the Middle Holocene climatic scenario. Ecological Informatics (2023).
4. Climate deterioration and subsistence economy in prehistoric Southern Iberia: an evaluation of potential links based on regional trajectories. Environmental Research Letters (2024).
5. Unprecedented recent regional increase in organic carbon and lithogenic fluxes in high altitude Pyrenean lakes. Scientific Reports (2023).