尼日利亚两种入侵性外来植物的土壤种子库动态:对生态系统恢复的影响
Gbenga F Akomolafe1,2, Rusly Rosazlina1, Bernard Omomoh3
1School of Biological Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia.
AoB PLANTS
|February 22, 2024
概括
两个入侵性植物,Hyptis suaveolens和Urena lobata,显著减少了本地种子库的多样性. 它们的可生存的种子集中在较低的土壤层中,影响恢复潜力.
科学领域:
- 生态生态学 生态生态学
- 植物学 植物学
- 环境科学 环境科学
背景情况:
- 土壤种子库对于生态恢复和入侵物种管理至关重要.
- 了解入侵植物对本地种子库的影响对于有效的控制策略至关重要.
- 虫 (Hyptis suaveolens) 和虫 (Urena lobata) 是影响当地生态系统的重要入侵植物物种.
研究的目的:
- 调查Hyptis suaveolens和Urena lobata对土壤种子库的影响.
- 评估这些入侵物种在入侵息地中的种子特性.
- 评估来自入侵种子库的本地物种的恢复潜力.
主要方法:
- 研究了30个地点:10个位于H. suaveolens入侵,U. lobata入侵和非入侵息地.
- 收集了每种息地类型的200个土壤样本.
- 利用苗木出现方法来确定种子银行招募情况,并分析了土壤层中的种子分布.
主要成果:
- 与未被侵占的地区相比,被侵占的地区表现出明显较低的地表植被多样性.
- H. suaveolens和U. lobata的种子银行产生的本地物种 (分别为2种和5种) 比非入侵地点 (53种) 少得多.
- 两种入侵者的活力种子都集中在较低的土壤层中,与在上层发现的本地种子不同.
结论:
- H. suaveolens和U. lobata的入侵大大减少了本土种子库的多样性,改变了种子的分布.
- 侵入性物种的种子特性和土壤层偏好影响其生态影响.
- 从被入侵的种子库中发芽的本地物种为恢复退化息地提供了潜在的潜力.
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