警惕“加拿大一枝黄花”入侵本土生态

Core Viewpoint - The emergence of the invasive species "Canadian goldenrod" in Shanghai's Pudong New Area has prompted urgent cleanup actions due to its rapid spread and ecological threat [1][3]. Group 1: Invasive Species Characteristics - "Canadian goldenrod," introduced to China in the 1930s as an ornamental plant, has now spread to over 20 provinces, extending its range to northern and northeastern regions [1]. - This species can produce over 20,000 seeds per plant during its flowering period from July to November, with seeds capable of being dispersed over several kilometers [1]. - It can also reproduce asexually through underground rhizomes, leading to explosive growth patterns, described as "one flower blooms and hundreds die" due to its aggressive nature [1]. Group 2: Ecological Impact - The plant alters soil pH by secreting acidic substances, leading to soil compaction and acidification, which threatens native plant species and disrupts biodiversity [2]. - The invasive species can dominate ecosystems, creating monocultures that severely impact the structure of local ecosystems [2]. Group 3: Control Measures - Experts recommend immediate removal of suspected plants, with professional cleanup required before seed maturity, including mechanical removal of underground rhizomes and soil deep plowing [2]. - Continuous monitoring for over three years post-removal is necessary to prevent regrowth [2]. - Public awareness and participation are crucial for early detection and control of invasive species, emphasizing the need for community involvement in ecological protection [3].