微量元素对入侵植物的影响:竞争力减弱,但对本土同类的持续主导地位
Yanni Chen1, Xiao Wang2, Mingyan Li3
1College of Landscape Architecture and Forestry, Qingdao Agricultural University, No. 700 Changcheng Road, Qingdao 266109, P.R. China; Academy of Dongying Efficient Agricultural Technology and Industry on Saline and Alkaline Land in Collaboration with Qingdao Agricultural University, Dongying 257347, China.
The Science of the total environment
|April 8, 2024
概括
城市土壤中的微量元素污染阻碍了入侵物种的竞争力,但并不能阻止成功的入侵. 侵入性植物仍然显示出优异的生长和根部发育,表明它们的弹性和持续生态破坏的潜力.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 城市生态城市生态学
背景情况:
- 人类活动造成的微量元素污染是一个日益严重的环境问题,特别是在城市地区.
- 侵入性物种在微量元素压力下经常超过本地物种,但这在不同的城市土壤条件下没有得到充分研究.
研究的目的:
- 调查模拟的城市土壤铜和水平对入侵植物和本土植物物种的生长和竞争相互作用的影响.
- 了解微量元素如何影响城市生态系统中的入侵物种和本地物种之间的功能特征和跨物种关系.
主要方法:
- 进行了一项温室实验,使用四对入侵本地植物对暴露于模拟的城市土壤度的铜 (102.29 mg kg-1) 和 (148.32 mg kg-1).
- 测量包括植物生长参数 (冠面积,叶面积,根生长) 和功能特征,以评估竞争结果和物种差异化.
主要成果:
- 微量元素的添加通常会削弱入侵物种的竞争力,但不会改变入侵的整体成功率.
- 与铜和处理的本地物种相比,侵入性物种的冠状面积,叶面积和根生长显著增加.
- 尽管添加了微量元素,但入侵物种和本地物种之间的功能差异仍然存在.
结论:
- 虽然微量元素可能会降低入侵物种的竞争优势,但它们并不能阻止城市土壤的成功入侵.
- 侵入性物种增强捕获光和资源的能力,特别是通过根部发育,对于它们的主导地位至关重要.
- 了解这些动态对于在污染的城市环境中管理入侵物种至关重要.
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