Urbanization has amplified the critical role of urban green spaces in enhancing public health and well-being. While natural landscape elements are known to influence physiological and psychological states through visual perception, their mechanistic pathways remain underexplored, and existing studies often focus on singular environments. This study examines how specific landscape elements affect public health and proposes optimization strategies for urban green space planning. Focusing on five green space types in Kunming (forests, wetlands, urban parks, street green spaces, and residential green spaces), this study employed PSPNet-based semantic segmentation to quantify landscape elements and conducted human–subject experiments using paired visual stimuli. Physiological metrics and psychological questionnaires were analysed to assess health outcomes. Key findings reveal that forests and urban parks, rich in natural elements (Plant and Earth and Mountain Elements), outperformed artificial-dominated spaces (residential/street green spaces) in physiological and psychological restoration. Artificially designed green spaces achieved benefits comparable to natural counterparts when mimicking natural element composition. Notably, aggregated indices (naturalness, artificiality, and enclosure) showed negligible correlations with health outcomes, underscoring the primacy of specific elements. The Plant and Earth and Mountain Elements mediated physiological recovery, while minimizing the Building and Artificial Element and enhancing the Sky Element exposure improved attention coherence. Excessive Water Element perception impaired heart rate stabilization, while psychological restoration mechanisms were multifaceted but were consistently linked to higher natural element proportions. These results provide actionable guidelines for optimizing visual proportions of natural elements in urban green space planning and management.

Urban forests are important public recreation sites and play an important function in urban biodiversity conservation. Recent studies have found that urban forests have a beneficial effect on public physiological and psychological health. Birdsong in urban forests has good physiological and psychological recovery benefits and is also the most frequent natural sound. In this paper, a blank group, visual perception, and audiovisual perception were studied by investigating birds in five kinds of urban forests and simulating their birdsong environment. The results showed the following: (1) The visual perception and audiovisual perception of urban forests are restorative to the public’s physiology and psychology. Forests and urban parks with higher natural elements have relatively strong physiological and psychological recovery benefits, and roadside green spaces with higher artificial elements have relatively weak recovery benefits. However, both natural and artificial urban forests can show better recovery. (2) Birdsong perception preference has a mediating effect on the recovery benefit of heart rate and a moderating effect on the recovery benefit of skin conductance, which can affect the recovery benefits of urban forests on public physiology and psychology. (3) Because people’s perceptions of the timbre of birdsong vary, the benefits of birdsong on recovery are not always favorable. The richness and pleasantness of birdsong in the forest environment are significant contributors to the recovery advantages and the likability and comfort of birdsong in the rest of the setting. Based on differences in the composition of birds in different urban forest environments, this study simulated the birdsong environment with birds based on field research and studied the public perception recovery of the urban forest visual environment and the urban forest and birdsong audiovisual environment in order to explore the influence of birdsong on the public health recovery properties of urban forests. This study provides an optimal strategy for the selection and construction of forest healing functions and promotes the development of urban ecosystems and biodiversity.

This study employs a multi-model coupling and multi-scenario simulation approach to construct a framework for identifying and optimizing avian ecological corridors in the urban core of Kunming. The framework focuses on the ecological needs of resident birds (64.72%), woodland-dependent birds (39.87%), and low-mobility birds (47.29%) to address habitat fragmentation and enhance urban biodiversity conservation. This study identifies 54 core ecological corridors, totaling 183.58 km, primarily located in forest–urban transition zones. These corridors meet the continuous habitat requirements of resident and woodland-dependent birds, providing a stable environment for species. Additionally, 55 general corridors, spanning 537.30 km, focus on facilitating short-distance movements of low-mobility birds, enhancing habitat connectivity in urban fringe areas through ecological stepping stones. Eighteen ecological pinch points (total area 5.63 km²) play a crucial role in the network. The northern pinch points, dominated by forest land, serve as vital breeding and refuge habitats for woodland-dependent and resident birds. The southern pinch points, located in wetland-forest ecotones, function as critical stopover sites for low-mobility waterbirds. Degradation of these pinch points would significantly reduce available habitat for birds. The 27 ecological barrier points (total area 89.79 km²), characterized by urban land use, severely impede the movement of woodland-dependent birds and increase the migratory energy expenditure of low-mobility birds in agricultural areas. Following optimization, resistance to resident birds in core corridors is significantly reduced, and habitat utilization by generalist species in general corridors is markedly improved. Moreover, multi-scenario optimization measures, including the addition of ecological stepping stones, barrier improvement, and pinch-point protection, have effectively increased ecological sources, met avian habitat requirements, and secured migratory pathways for waterbirds. These measures validate the scientific rationale of a multidimensional management strategy. The comprehensive framework developed in this study, integrating species needs, corridor design, and spatial optimization, provides a replicable model for avian ecological corridor construction in subtropical montane cities. Future research may incorporate bird-tracking technologies to further validate corridor efficacy and explore planning pathways for climate-adaptive corridors.

Contacting forests in different ways and conducting public perception evaluations of forests are important ways to evaluate forest construction. In order to explore the differences between on-site and manual post-collection indoor evaluations in forest landscape surveys, we combined subjective evaluation and objective indicator monitoring (eye movement characteristics, physiological indicators) based on different forest observation scales. We compared and analyzed the suitability of the following four visual approaches: on-site observation, manual collection, followed by indoor viewing normal photos (NP), videos (VD), and virtual reality panoramas (VR), in terms of public preference, perception, and psychological emotion. The results showed the following: (1) Compared with the on-site evaluation, the three indoor visual approaches (NP, VD, and VR) showed no significant difference in “landscape beauty” and “spatial perception”. VD also showed no significant difference in “landscape perception”, “seeing”, and “plant color preference” and had the strongest substitution for site evaluation. (2) With the exception of small-scale landscapes, in which on-site evaluation showed no substitutability, for the rest of the landscape scales, each of the three indoor visual approaches showed substitutability for on-site evaluation to varying degrees. (3) When conducting physiological and psychological surveys, watching videos and VR are more ideal. In terms of eye tracking, VR is closest to on-site observation. Practice shows that video was closer to on-site observation in most landscape preferences and perceptions. VR was suitable for presenting public visual behavioral characteristics, and NP showed some advantages in landscape beauty and spatial perceptions. The findings of the study can provide a scientific basis for the selection of visual approaches in future landscape evaluation.

As global populations concentrate in high-density settlements, urban forests gain prominence as integrated socio-ecological systems. Within contemporary urbanization, waterfront greenways have beco...

Introduction: Under rapid urbanization, the misalignment between urban park accessibility and population demand has intensified concerns about environmental equity. However, few studies have examined the long-term spatiotemporal dynamics of urban park accessibility and population demand while accounting for multiple travel modes and spatial scales. Methods: Taking central Kunming as a case study, this research integrated multi-source spatiotemporal data from 2010 to 2025. Dual-scale spatial analysis was conducted at both grid and subdistrict levels, and the three-step floating catchment area (3SFCA) method was applied to assess urban park accessibility under different travel modes. Based on these results, the study further examined accessibility inequality, spatial associations between population and accessibility, direct mismatch patterns, and the coupling trajectories between accessibility growth and population growth over time. Results: The number of urban parks increased from 79 in 2010 to 254 in 2025, representing an increase of 221.5%, while the total park area expanded from 2,501 ha to 4,467 ha. Over the 15-year period, accessibility growth outpaced population growth in 58.49, 60.38, and 56.60% of all subdistricts under walking, e-biking, and driving modes, respectively, although localized accessibility-deficit areas shifted geographically over time. In older urban areas such as Wuhua and Panlong, overall accessibility remained relatively low, but its distribution exhibited greater equity, partly due to the high density of pocket parks. By contrast, Guandu District and the surrounding urban–rural transition zones emerged as persistent areas of high population demand and localized accessibility deficits. Travel mode substantially influenced accessibility and equity patterns. Driving provided the broadest accessibility coverage, but higher mobility did not consistently correspond to fewer high-demand–low-accessibility areas. E-biking showed clear advantages in reducing such spatial mismatches in densely populated areas. Conclusion: This study supports more refined and equitable urban park planning by integrating multimodal accessibility assessment with dual-scale analysis. It helps identify priority areas and guide targeted spatial interventions. Future urban park planning should move beyond aggregate expansion toward demand-responsive allocation that prioritizes accessibility-deficit areas based on actual population distribution and travel-mode conditions.