Where We Plant Matters: Can Poplar Plantations Help Birds Cross Fragmented Farmland?

Across much of Europe, agricultural intensification has broken forest habitats into smaller and more isolated patches, making it harder for forest birds to move through the landscape. This study explored whether poplar plantations, which are already widespread in many farming areas, can help reconnect those fragmented habitats. Using two agricultural sub-catchments in Spain and France, the authors modelled how three forest bird species with different dispersal abilities responded when plantations were added to forest networks inside and outside Natura 2000 areas.

The results showed that poplar plantations can indeed improve connectivity, but not simply by adding more tree cover everywhere. Their value depended strongly on where they were located. Plantations were most useful when they acted as stepping stones between larger forest patches, especially along river corridors. The benefits were also species-specific: birds with medium or long dispersal abilities gained more than short-distance species, which still need habitat patches to be very close together. In other words, the study showed that landscape design matters as much as plantation area.

This is an important message for both land managers and policy makers. Poplar plantations should not be treated as a universal substitute for natural forests, but they can function as complementary elements in fragmented agricultural landscapes. Strategically placed plantations may strengthen ecological connectivity, support biodiversity goals, and improve the wider green infrastructure around protected areas. At the same time, the authors stress that location remains crucial, because plantations may be less helpful in some settings and can even conflict with the needs of open-habitat species if poorly placed. The main lesson is simple but powerful: in biodiversity-friendly land use planning, where we plant may matter as much as what we plant.

Pineda-Zapata, S., Morán-Ordoñez, A., Mola-Yudego, B., & Duflot, R. (2026). Strategic placement of plantations enhances forest connectivity for birds in agricultural landscapes. Landscape Ecology, 41, Article 54. https://doi.org/10.1007/s10980-026-02316-z

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As Europe accelerates its shift toward a low-carbon economy, the pressure to deliver sustainable biomass is rising fast, yet the hardest question is no longer only what to grow, it is where to grow it. Fast-growing plantations and perennial energy grasses can underpin biofuels and biomaterials, while also supporting carbon storage, water protection, and soil functions. However, when these systems expand as large, poorly integrated blocks, they can simplify land use patterns, weaken habitat variety, and reduce ecological resilience. The promise of the bioeconomy, therefore, depends on spatial intelligence: biomass systems need to be placed as part of the landscape, not imposed on top of it.

A recent open-access study addressed this challenge by building one of the most comprehensive empirical pictures yet of biomass production systems across Europe. Using harmonised spatial data for 426,783 fields and stands, covering 2,140,568 hectares across 17 countries, the authors characterised seven representative systems, including eucalypt, radiata pine, black locust, poplar and hybrid aspen, willow, miscanthus, and reed canary grass. They then assessed the land-use context around each site using 1 km buffers and CORINE land cover, translating “how mixed is the surrounding landscape?” into a Land Use Diversity Index based on Shannon diversity. The result was a practical lens for policy and planning: it showed not just where biomass is today, but where it is likely to diversify, or homogenise, the landscapes around it.

The key insight was that context dominates: the same crop can be either a corridor of diversity or an engine of simplification, depending on where it is inserted. Willow stood out as the strongest candidate for diversification, with 57% of willow plantations located in homogeneous, agriculture-dominated areas, where woody strips can introduce structural variety and potentially strengthen multifunctionality. Poplar and black locust also showed meaningful opportunities, with sizeable shares of stands situated where they could add “forested elements” into agricultural matrices. By contrast, miscanthus was often concentrated in low-diversity agricultural settings, suggesting that, without deliberate spatial planning, it may do little to raise local land-use diversity. The study also highlighted a recurring risk signal: biomass areas were highly unevenly distributed, with the largest 20% of stands accounting for the majority of total area, and thousands of very large polygons, a pattern that can translate into landscape dominance when not carefully governed. A sustainable bioeconomy is a design problem, and better maps, better metrics, and better placement rules are as important as better crops.

Read more:
Pineda-Zapata, S., & Mola-Yudego, B. (2025). European biomass production systems: Characterization and potential contribution to land use diversity. GCB Bioenergy, 17, e70057. https://doi.org/10.1111/gcbb.70057
DOI: 10.1111/gcbb.70057