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In this study, nighttime light intensity was adopted as a proxy for economic activity, and a random forest model was constructed to integrate both anthropogenic and meteorological factors for O3 concentration prediction. Panel data from the Beijing-Tianjin-Hebei region and surrounding areas (the "2+26" cities) during 2014~2022 were employed to empirically examine the differential contributions of economic activity intensity across various temporal scales, spatial regions, and pollutant types. The findings showed that:①economic activity intensity consistently exhibited significant predictive power across different temporal scales. On the annual scale, its importance reached 0.7053, surpassing all meteorological variables and becoming the dominant predictor. In contrast, on the daily scale, temperature and other meteorological factors were found to be more influential, with the contribution of economic activity reduced to 0.0869. ②Marked spatial heterogeneity was observed between high- and low- O3 concentration areas. Temperature and economic activity had stronger impacts in high- O3 regions, while low-concentration regions displayed irregular and spatially discontinuous patterns of predictor relevance. ③ Over long time horizons, economic activity was identified as a decisive factor in explaining both PM2.5 and O3 concentrations. However, on shorter time scales, although economic activity was the second most important factor for PM2.5 prediction after temperature, its contribution to O3 prediction remained relatively limited.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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