Tree species composition governs urban phenological responses to warming

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: April 18, 2025

Urban environments are typically warmer than surrounding rural areas, providing a unique setting for studying phenological responses to climate warming. Phenological differences between urban and trees driven by local species composition. Yet, the extent which composition influences urbanization remains poorly understood. To address this, we combine manipulative experiments, satellite-derived phenology data, georeferenced tree occurrence records. Our findings show that, across Northern Hemisphere cities, in temperature sensitivity of spring areas largely urban-rural variation composition, surpassing effects preseason temperature. This pattern is particularly pronounced Asian where exhibit 0.74 ± 0.24 days/°C higher areas. In-depth analyses using experiments high-resolution satellite imagery from Beijing further demonstrate species-specific urbanization, with urban-dominant exhibiting compared ones. These that both interspecific contribute impact on patterns. study underscores importance considering when warming, especially contexts.

Language: Английский

Effects of Plant Communities in Urban Green Spaces on Microclimate and Thermal Comfort

Forests, Journal Year: 2025, Volume and Issue: 16(5), P. 799 - 799

Published: May 10, 2025

Urban green spaces are crucial for regulating microclimates and enhancing human comfort. The study, conducted at Jiyang College of Zhejiang A&F University, investigates the effects plant communities with diverse canopy structures on campus thermal comfort in summer winter. Data air temperature (AT), relative humidity (RH), wind speed (WS), light intensity (LI) were collected over three consecutive sunny days both Concurrently, community structural characteristics, including three-dimensional biomass (3DGB), density (CD), sky-view factor (SVF), measured analyzed. Quantitative relationships between these characteristics microclimate/thermal indices evaluated using statistical analyses. results indicate that, summer, produced significant cooling (daily average AT reduced by 2.3 °C) humidifying effects, decreased daily maximum index (THI) 1 °C compared to control areas without vegetation. In winter, moderation was present but less pronounced, no statistically difference observed. Communities larger 3DGB, higher CD, lower SVF provided more effective shading improved microclimatic regulation. A regression analysis identified as primary influencing outdoor across seasons. Planting configurations such “Tree-Shrub-Herb” “Tree-Small Tree”, well use broad-crowned shade trees, shown be optimizing microclimate Overall, vegetation structure may address requirements environments throughout year.

Language: Английский