Online Resource 2 – Land-use transition (Sankey) diagram (COS 1995–2018)
Description

This resource contains the land-use transition diagram used in the study (Fig. S1).
The figure illustrates proportional flows among the three dominant land-cover classes—agriculture, forest, and shrubland—between COS 1995 and COS 2018 in the Côa River Basin.
The diagram summarizes long-term land-cover stability and highlights the relatively limited transitions among categories over this 23-year period, providing contextual information for interpreting avian community changes.

Contents
Fig. S2 — Land-use transition (Sankey) diagram (COS 1995–2018)
Caption

Fig. S2. Land-use transition (Sankey) diagram showing proportional flows among agriculture, forest, and shrubland classes between COS 1995 and COS 2018 in the Côa River Basin. Land-cover data derived from COS Series 1 (COS1995v2-S1 and COS2018v2-S1; DGT 2020).

Data source

DGT (2020) Carta de Uso e Ocupação do Solo de Portugal Continental, Série 1 – COS1995v2-S1 e COS2018v2-S1.
Direção-Geral do Território, Lisboa.
Available at: https://snig.dgterritorio.gov.pt
 (accessed 8 Aug 2025)

Acknowledgement

Land-cover datasets were provided through SNIG/geoportal services of the Direção-Geral do Território (DGT).

License

CC BY 4.0
1.0 (2025-11-30)