Public Perception of Urban Forests in Portugal

Urban forests and green spaces provide important ecosystem services that support climate adaptation, public health, and urban sustainability. Despite growing evidence from individual Portuguese cities, nationwide data on how citizens perceive, use, and support the governance of urban green spaces remain limited. This study addresses that gap through a nationwide online survey conducted in Portugal in 2024, gathering 927 valid responses from Portuguese adults across metropolitan, intermediate-density, and low-density municipalities, to investigate public perceptions of ecosystem services, patterns of green space use, management challenges, and attitudes toward urban forestry governance policies. Results revealed strongly positive perceptions of urban trees and green spaces across all sociodemographic groups, with over 95% of respondents acknowledging that urban green spaces positively influence physical and mental health. Regulating services, including air quality improvement, urban noise reduction, climate change mitigation, and flood mitigation, received the highest levels of agreement, while cultural ecosystem services were positively perceived but with comparatively lower agreement. Accessibility emerged as a critical determinant of visitation frequency: 85% of respondents could reach a green space within 15 min, and 82% of daily users lived within 300 m of one, broadly consistent with the 3 + 30 + 300 principle. Frequent visitation was primarily associated with relaxation, physical activity, and social interaction. Conversely, only 6% considered that trees cause more damage than benefits, with pavement damage and superficial roots cited as the more significant management challenges. Support for public investment was broad, with over 90% of respondents favouring allocating municipal tax revenues to urban tree management. However, 68% remained unfamiliar with Law No. 59/2021, revealing a gap between public support and policy awareness. These findings establish a national baseline to support municipalities in developing more resilient, inclusive, and health-promoting urban environments in the face of climate change, as they align urban forestry practices with citizens’ expectations.