Microclimatic buffering of plant responses to macroclimate warming in temperate forests

Informations projet

FORMICA

N° de convention de subvention: 757833

DOI

10.3030/757833

Projet clôturé

Date de signature de la CE 7 Septembre 2017

Date de début 1 Février 2018

Date de fin 31 Janvier 2023

Financé au titre de

• EXCELLENT SCIENCE - European Research Council (ERC)

Coût total

€ 1 498 469,00

Contribution de l’UE

€ 1 498 469,00

Coordonné par

UNIVERSITEIT GENT
Belgium

Periodic Reporting for period 4 - FORMICA (Microclimatic buffering of plant responses to macroclimate warming in temperate forests)

Période du rapport: 2022-08-01 au 2023-01-31

Résumé du contexte et des objectifs généraux du projet

Recent global warming is acting on ecosystems across the globe and threatening biodiversity. Yet, due to slow responses, many biological communities are lagging behind warming of the macroclimate (the climate of a large geographic region). The buffering of microclimates near the ground measured in local areas, arising from terrain features such as vegetation and topography, can explain why many species are lagging behind macroclimate warming. However, almost all studies ignore the effects of microclimates and key uncertainties still exist about this mechanism.

Microclimates are particularly evident in forests, where understorey habitats are buffered by overstorey trees. In temperate forests, the understorey contains the vast majority of plant diversity and plays an essential role in driving ecosystem processes.

The overall goal of FORMICA (FORest MICroclimate Assessment) was to quantify and understand the role of microclimatic buffering in modulating forest plant responses to macroclimate warming. We applied microtemperature loggers, performed experimental heating, used fluorescent tubes and installed a large-scale transplant experiment in temperate forests across Europe. The results were then integrated in models to forecast plant diversity in temperate forests as macroclimate warms.

We found strong microclimate buffering in European forests, translating both to current forest biodiversity patterns and forest functioning, as well as providing a thermal buffer against future climate change.

FORMICA was a large integrative study on microclimatic buffering of macroclimate warming in forests. The project has reshaped our current understanding of the impacts of climate change on forests and is helping land managers and policy makers to now develop urgently needed adaptation strategies.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

Background data have been collected on microclimate, forest structure, light, soils, etc. in 9 regions along a north-south transect. In addition, data on vegetation composition, plant traits, collection of biomass, etc. were also collected. We have published results on vegetation community composition (Govaert et al. 2020 Journal of Vegetation Science), forest structure (Meeussen et al. 2020 Forest Ecology & Management), carbon stocks (Meeussen et al. 2020 Science of the Total Environment) and defence traits (Sacnzuk et al. 2021 Global Ecology and Biogeography), and collected and analysed data on traits, thermal tolerance and biodiversity data (several papers) and how they are affected by edge-to-core gradients and the microclimate in forests. We also installed a warming and light experiment to unravel the effects of heating temperatures and irradiation in contrasting microclimates on forest understorey plants (De Pauw et al. 2022 New Phytologist). Third, species have been transplanted into forests in five locations along our north-south transect, in the edge and into the forest core, and this repeated in dense and open forests (Sanczuk et al. 2022). These results have then been integrated in models to forecast plant diversity in temperate forests as macroclimate warms, showing the strong buffering role of denser canopies on biodiversity reshuffling (Sanczuk et al. 2023).

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

Analysing effects of microclimate on forest biodiversity in forests at these scales, using observational, experimental and modelling methods, has delivered novel insights that are not possible using more small-scale local experiments.

Fish-eye view of the canopy of trees in the middle of spring in Gontrode (BE)

Wildflowers in the forest understorey in Spring (here wood anemone, Anemone nemorosa)