Time: 12.00-13.00, 4 July 2019 (Thursday)
Venue: Drummond Street, Room (2.01)
Drummond Street, Edinburgh, EH8 9XP
Title: Urban greenery and mental wellbeing in adults: Mediation analyses on multiple pathways based on streetscape greenery measures
Speaker: Professor Ye Liu – Sun-Yat-sen University, China
Multiple mechanisms have been proposed to explain how greenery in the vicinity of people’s homes enhances their mental health and wellbeing. Mediation studies, however, focus on a limited number of mechanisms and rely on remotely sensed greenery measures, which do not accurately capture how neighborhood greenery is perceived on the ground. This study aims to examine: 1) how streetscape and remote sensing-based greenery affect people’s mental wellbeing; 2) whether and to what extent the associations are mediated by physical activity, stress, air quality and noise, and social cohesion; and 3) whether differences in the mediation across the streetscape greenery and NDVI exposure metrics occurred. We used a population sample from 2016 of 1,029 adult residents of the metropolis of Guangzhou, China. Two objective greenery measures were extracted at the neighborhood level: 1) streetscape greenery from street view data via a convolutional neural network, and 2) the normalized difference vegetation index (NDVI) from Landsat 8 remote sensing images. Single and multiple mediation analyses with multilevel regressions were conducted. Regression results show that mental health and wellbeing and both streetscape and satellite-derived greenery seem to be both directly correlated and indirectly mediated. Our findings signify that both greenery measures capture different aspects of natural environments and may contribute to people’s wellbeing by means of different mechanisms.
Bio of the speaker:
Dr. Ye Liu is currently a Professor in the School of Geography and Planning, Sun Yat-sen University, China. Prior to joining Sun Yat-sen University in 2017, he was Postdoctoral Research Fellow at University of St Andrews (UK), The Chinese University of Hong Kong (Hong Kong), and University of Lethbridge (Canada). His primary research interests focus on Health Inequalities, Health and Wellbeing in the Urban Environment, Migration and Urbanization. His research works have been published in international peer-reviewed journals such as Regional Studies, Urban Studies, Population Space and Place, Landscape and Urban Planning, Cities, Urban Geography, Computers, Environment and Urban Systems, Environment International, Journal of Affective Disorders and Environmental Research. He is sponsored by the Recruitment Program for Young Professionals of the ‘Thousand Talents Plan’ (qian ren ji hua). He is the Principal Investigator of two research projects funded by Natural Science Foundation of China.