浙江农业学报 ›› 2025, Vol. 37 ›› Issue (11): 2325-2339.DOI: 10.3969/j.issn.1004-1524.20250055

• 植物保护 • 上一篇    下一篇

加拿大一枝黄花入侵对温州沿海区域植物群落结构的影响

应碧旷1,2(), 刘宇2, 魏馨2, 李晶2, 王金旺2,*()   

  1. 1.浙江农林大学 林业与生物技术学院,浙江 杭州 311300
    2.浙江省亚热带作物研究所,浙江 温州 325005
  • 收稿日期:2025-01-17 出版日期:2025-11-25 发布日期:2025-12-08
  • 作者简介:应碧旷(1998—),男,浙江台州人,硕士研究生,主要从事林业生态研究。E-mail:18857615869@163.com
  • 通讯作者: *王金旺,E-mail: kingwwang@163.com
  • 基金资助:
    农业农村部政府购买服务项目(13230119)

Impacts of Solidago canadensis invasion on plant community structure in coastal region of Wenzhou, China

YING Bikuang1,2(), LIU Yu2, WEI Xin2, LI Jing2, WANG Jinwang2,*()   

  1. 1. College of Forestry and Biotechnology, Zhejiang A&F University, Hangzhou 311300, China
    2. Zhejiang Institute of Subtropical Crops, Wenzhou 325005, Zhejiang, China
  • Received:2025-01-17 Online:2025-11-25 Published:2025-12-08

摘要: 加拿大一枝黄花(Solidago canadensis)是被列入《中国第二批外来入侵物种名单》的植物,于2003年在温州发现有分布。选择沿海典型生境,基于温州市40个样方调查数据,开展加拿大一枝黄花在不同入侵程度与不同生境中对群落结构、物种多样性的影响研究,探讨其入侵特征与机制。结果表明:温州市沿海典型生境中,加拿大一枝黄花入侵的群落包含维管植物13科28属34种,其中,外来入侵植物的物种数占26.5%。随着加拿大一枝黄花入侵程度的增强,群落内的物种数逐渐降低,外来入侵植物的种类占比逐渐增加,且外来入侵植物的重要值之和逐渐增加。在供试样方中,加拿大一枝黄花的重要值与生态位宽度在各类入侵群落中均最高,且其他外来入侵植物的重要值与生态位宽度也多位于各样方前列。加拿大一枝黄花重度入侵群落的多样性指数显著(p<0.05)低于轻、中度入侵群落。加拿大一枝黄花的相对多度与其他外来入侵植物、本土植物呈负相关关系,且其相关性随入侵程度的增强而增强。生态位重叠指数分析进一步明确,在中、重度入侵群落中,加拿大一枝黄花与其他外来入侵植物、本土植物之间逐渐增强的竞争关系是导致以上结果的重要原因。在各地类中,园地与交通用地有利于外来入侵植物扩散,而耕地有利于防止外来植物入侵。

关键词: 生物入侵, 生境, 加拿大一枝黄花(Solidago canadensis), 物种多样性, 生态位

Abstract:

Solidago canadensis, a plant listed on the second batch of alien invasive species in China, was first detected in Wenzhou in 2003. In the present study, typical coastal habitats in Wenzhou were strategically selected, and the survey data collected from 40 quadrats were used to to meticulously investigate the variations in the community structure and species diversity of S. canadensis invasions under diverse invasion intensities and habitat types, to reveal the invasion characteristics and underlying mechanism of S. canadensis in coastal areas. It was shown that within the invaded communities of S. canadensis in Wenzhou, there were 34 species of vascular plants, which were taxonomically classified into 28 genera across 13 families. Notably, invasive plants accounted for 26.5% of the total species. As the invasion degree of S. canadensis intensified, the number of community species, encompassing both native and invasive plants, declined gradually. Concomitantly, the proportion of invasive species increased, and the cumulative importance value of invasive plants steadily rose. Further in-depth analysis demonstrated that S. canadensis boasted the highest importance value and niche breadth within invaded communities. In comparison to native species, the importance value and niche breadth of other invasive plants predominantly ranked among the top positions in these commuties. Furthermore, the species diversity indexes of the severely invaded communities were significantly (p<0.05) lower than those of the slightly and moderately invaded ones. There was negative correlation within S. canadensis and both invasive and native plants in the relative abundance, and this correlation strenthened as the invasion degree escalated. The analysis of niche overlap index further corroborated that the increasingly competitive relationships between S. canadensis and other invasive as well as native species within moderately and severely invaded communities were the root causes underlying the aforementioned outcomes. Among different habbitats, garden and transportation land facilitated the dissemination of alien species. In contrast, cultivated land might offer certain protection against alien invasive plants.

Key words: biological invasion, habitat, Solidago canadensis, species diversity, niche

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