侵袭性树木物种会影响营养不良但营养不丰富的温带森林中的土壤植物生物质和生物多样性
Sebastian Bury1, Marcin K Dyderski2
1Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, 62-035, Kórnik, Poland.
Scientific reports
|February 12, 2025
概括
诸如Prunus serotina和Robinia pseudoacacia之类的侵袭性树木会损害土型植物,特别是在营养不良的森林中. 它们的生物量显著影响植物覆盖和丰富性,没有观察到安全的入侵水平.
科学领域:
- 生态生态学 生态生态学
- 植物学 植物学
- 保护生物学 保护生物学
背景情况:
- 侵入性树木物种威胁着生物多样性,但它们对地植物的具体影响仍未得到充分研究.
- 以前的研究经常比较入侵与未入侵的地点,忽视了入侵者丰富 (生物质) 的影响.
研究的目的:
- 评估Prunus serotina和Robinia pseudoacacia对土型植物的影响.
- 分析这些对营养缺乏 (Pinus sylvestris) 和营养丰富 (Quercus spp.) 的影响. 沿着入侵生物质梯度的地点.
主要方法:
- 在160个地块 (100平方米) 进行了植被调查,以评估植物覆盖面和物种丰富度.
- 在每个研究图片内的8个0.264平方米的子图片中测量入侵生物质.
- 分析了考虑到地点类型 (营养不良与营养丰富) 和入侵生物质的数据.
主要成果:
- 这两种入侵性树种都对植物覆盖和生物量产生了负面影响.
- 罗比尼亚伪木显著减少了植物物种的丰富性.
- 对特定的植物物种 (Pleurozium schreberi,Dicranum polysetum,D. scoparium) 的负面影响仅在营养不良的地点观察到.
结论:
- 在营养丰富的宽叶植物中,土型植物的脆弱性较低,但在营养贫乏的针叶植物中,脆弱性较高.
- 侵入性树木的生物量是决定对植物影响的关键因素.
- 对于侵袭性树木生物质,没有安全门存在,因为它对土壤巨型植物的有害影响.
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