看到立即上报！上海发现“加拿大一枝黄花”

Core Viewpoint - The discovery of "Canadian Goldenrod," an invasive species, in Shanghai highlights its rapid growth and potential ecological damage, prompting immediate cleanup efforts by local authorities [1][3]. Group 1: Invasive Species Characteristics - "Canadian Goldenrod" can release over 20,000 seeds from a single plant, showcasing its strong propagation ability [1]. - Originally from North America, it was introduced to China in 1935 as an ornamental plant and became a significant weed by the 1980s [1]. - The plant's flowering and fruiting period is from July to November, and it can thrive in various environments, including slopes, forests, and wetlands [3]. Group 2: Ecological Impact - The plant's aggressive growth can lead to soil degradation, as it competes for water and sunlight, potentially causing other plants to die off [4]. - Its extensive root system can compact the soil, leading to reduced soil quality and increased acidity, which can further harm local ecosystems [4]. - The plant's pollen can trigger allergic reactions, with severe cases resulting in symptoms like hives [3]. Group 3: Cleanup Efforts - Local authorities have initiated cleanup operations, utilizing bulldozers to remove the roots and rework the soil in affected areas [3]. - Approximately 20 acres of "Canadian Goldenrod" have been cleared after a day of intensive work [4]. - Residents are advised to report sightings of the plant to local departments to prevent further spread [4].