Axis 1 - Representations and ecological functioning of agri-forestry landscapes

The objectives of axis 1 "Representations and ecological functioning of agroforestry landscapes" are to assess the role of spatial and temporal heterogeneity and practices on biodiversity, to study the link between biodiversity and multifunctionality at the landscape level, to explore various representations of spatial and temporal heterogeneity and the influence of these representations on the understanding of the ecological functioning of agroforestry landscapes.

The work developed in this area mainly involves remote sensing, ecology, modelling, statistics and, to a lesser extent, social sciences. The locks considered in this axis are theoretical and methodological. From a theoretical point of view, the work is based in particular on the role of the spatio-temporal continuity of resources (Schellhorn et al. 2015) and the quantity of habitat (Fahrig 2013) for biodiversity, as well as the relationship between biodiversity and multifunctionality (Meyer et al. 2018) at the landscape level. From a methodological point of view, the work aims in particular to develop multi-source (optical data, radar, LiDAR, historical spatial data) and continuous (unclassified images) approaches to characterize the spatial and temporal heterogeneity of landscapes, and to develop multi-taxa and multi-trophic approaches to assess biodiversity levels and understand the ecological functioning of landscapes (Soliveres et al. 2016).

All the work carried out in axis 1 contributes to the understanding of the effects of global changes, particularly land use and climate change, on biodiversity and the ecological functioning of agriforestry landscapes.

This understanding also contributes to the development of relevant biodiversity indicators, in particular indicators measurable from remote sensing (Pettorelli et al. 2016), to propose possible reference states, and to model the effects of the dynamics of agriforestry landscapes on biodiversity and the ecological functions underlying the production of ecosystem services. These three themes are at the interface between the work carried out in axis 1 and that carried out in the "Group" axis on the management and governance of agroforestry landscapes.

Moderators: Emilie Andrieu and Harold Clenet

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Références

Fahrig L (2013) Rethinking patch size and isolation effects: the habitat amount hypothesis. J Biogeogr 40:1649–1663. doi: 10.1111/jbi.12130

Meyer ST, Ptacnik R, Hillebrand H, et al (2018) Biodiversity–multifunctionality relationships depend on identity and number of measured functions. Nat Ecol Evol 2:44. doi: 10.1038/s41559-017-0391-4

Pettorelli N, Wegmann M, Skidmore A, et al (2016) Framing the concept of satellite remote sensing essential biodiversity variables: challenges and future directions. Remote Sens Ecol Conserv 2:122–131. doi: 10.1002/rse2.15

Schellhorn NA, Gagic V, Bommarco R (2015) Time will tell: resource continuity bolsters ecosystem services. Trends Ecol Evol 30:524–530. doi: 10.1016/j.tree.2015.06.007

Soliveres S, van der Plas F, Manning P, et al (2016) Biodiversity at multiple trophic levels is needed for ecosystem multifunctionality. Nature 536:456–459. doi: 10.1038/nature19092