Poster De Conférence Année : 2022

What can climate-forced vegetation modelling and pollen-based reconstructions tell us about anthropogenic impact on European vegetation of the Holocene ?

Anhelina Zapolska
Aurélien Quiquet
Mathieu Vrac
Frank Arthur
Hans Renssen
  • Fonction : Auteur
  • PersonId : 1098173
Louis François
  • Fonction : Auteur
  • PersonId : 1142013

Résumé

Assessment of past anthropogenic modifications of landscape dynamics is crucial for understanding the human role in Earth systems, especially to question the natural state of the system. Recent advances in paleoenvironmental sciences allow us to assess long-term impacts of anthropisation on ecosystems, landscapes and land cover. Our study, conducted within the framework of the EU-ETN TerraNova project (https://www.terranova-itu.eu/), aims to combine pollen based reconstructions and vegetation modelling for highlight the relationship between vegetation changes and anthropogenics activities in Europe throughout the Holocene. The medthod is based on comparison between modelled and reconstructed vegetation cover over 25 time windows from 11700 BP to 0 BP at 1x1 spatial resolution for Europe. Modelled vegetation is derived from climate-forced vegetation modelling, using a dynamic vegetation model (CARAIB) forced by the downscaled verszion of the iLOVECLIM climate model, and represents potential natural vegetation of the past. Climatic variables, derived from the iLOVECLIM are bias-corrected using cumulative distributionn fonctions transformation (CDF-t) method. Pollen based reconstructions are obtaiend by applying the "Regional Estimates of VEgetation Abundance from Large Sites" (REVEALS) model on pollen records to reconstruct observed vegetation cover across Europe over the Holocene. The comparision is performed using presence fractions for 10 plant functional types, calculated by CARAIB and REVEALS independently. The expected results of this comparison is to allow us to distinguish between the role of climatic conditions and seed dispersal effects in pollen-based vegetation reconstruction from other types of impact. Addionally, the evolution of discrepancies in two datasets is expected to give an opportunity to estimate possible role of anthropogenic factor in European vegetation distribution change cover the Holocene.

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Dates et versions

hal-04805005 , version 1 (26-11-2024)

Identifiants

  • HAL Id : hal-04805005 , version 1

Citer

Anhelina Zapolska, Maria Antonia Serge, Florence Mazier, Aurélien Quiquet, Mathieu Vrac, et al.. What can climate-forced vegetation modelling and pollen-based reconstructions tell us about anthropogenic impact on European vegetation of the Holocene ?. Quaternaire 13 "Palaeoclimate changes, landscape eolution and human societies from sedimentary basins to industrial landscapes", Mar 2022, Strasbourg, France. ⟨hal-04805005⟩
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