Shortlisted for the 2025 Southwood Prize
In regards to the analysis
Overview
Our paper investigates tips on how to maximize the cooling impact of city forests. We needed to know whether or not a tree’s leaf traits (like nutrient content material) are extra essential than its bodily construction (like cover dimension) for decreasing air temperature and rising humidity in cities. By combining conventional forest surveys with superior LiDAR expertise in Shanghai, we sought to uncover which particular traits drive these microclimate advantages at completely different occasions of the day.
Surprises and challenges
We had been stunned to seek out that leaf nutrient traits (nitrogen, phosphorus, and potassium) had been twice as essential as cover construction for cooling through the morning and afternoon. We additionally anticipated excessive potassium to be useful, nevertheless it truly diminished the cooling impact.
A important and difficult step was the handbook refinement of particular person tree segmentation after integrating drone and handheld laser scanner information to create correct 3D fashions of practically 4,000 particular person bushes throughout 34 forest plots.
Subsequent steps and broader implications
The following step is to scale up this analysis. We have to discover how these trait-cooling relationships maintain throughout completely different local weather zones, as outcomes from Shanghai might not apply on to arid or temperate cities. Moreover, future research ought to mix this trait-based method with distant sensing (like hyperspectral imagery) to map the cooling potential of city forests throughout whole cities, shifting from plot-level research to landscape-level planning.
Our analysis presents a brand new, sensible information for city planners. As an alternative of simply planting extra bushes for shade, we advocate planting the proper bushes. To fight city warmth, insurance policies ought to prioritize species with excessive leaf nitrogen and phosphorus however low potassium—equivalent to Salix matsudana or Acer truncatum. This shifts the main target from merely increasing cover cowl to strategically deciding on bushes based mostly on their purposeful traits for max cooling.
In regards to the writer
Present place
I’m at present a postdoctoral researcher on the Future Urbanity & Sustainable Setting (FUSE) Lab within the School of Structure, The College of Hong Kong, working underneath Professor Bin Chen.
Getting concerned in ecology
I studied panorama structure as an undergraduate and needed to enhance human environments via design. Nonetheless, I noticed design alone has limitations and desires scientific information for assist. Subsequently, I selected city ecology for my six-year graduate research, specializing in enhancing city forest ecosystem providers. My PhD supervisors, Professors Kun Tune and Liangjun Da, supplied invaluable steerage, serving to me construct a strong ecological basis and supporting my information assortment and tutorial networking globally.
Present analysis focus
Beneath Professor Bin Chen’s steerage, I’m now investigating the patterns and mechanisms of city forest cooling results at a world scale. I additionally examine how city forests reply to excessive occasions and discover their potential unfavorable results on the city setting.
Recommendation for fellow ecologists
Discover an attention-grabbing analysis subject and dig deep into it. Persisting somewhat longer might result in sudden and rewarding discoveries.
Learn the complete article ‘Integrating forest stock and LiDAR observations to uncover the function of plant traits on cooling and humidifying results in city space’ in Journal of Utilized Ecology.
Discover the opposite early profession researchers and their articles which have been shortlisted for the 2025 Southwood Prize right here!
