成功扩展范围的工厂经历的地面和地下敌人影响较少
Tim Engelkes1, Elly Morriën, Koen J F Verhoeven
1Department of Multitrophic Interactions, Netherlands Institute of Ecology (NIOO-KNAW), PO Box 40, 6666 ZG Heteren, The Netherlands.
Nature
|November 21, 2008
概括
扩展范围的植物比本地物种对食草动物和土壤病原体的防御更强大. 这表明气候驱动的范围变化可能有利于侵略性物种减少敌人控制.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 植物科学 植物科学
背景情况:
- 由于气候变化,物种正在将范围转移到更高的度和高度.
- 了解影响范围扩大物种在新息地取得成功的因素至关重要.
研究的目的:
- 与本地物种相比,研究扩大范围的植物物种对食草动物和土壤病原体的防御机制.
- 评估敌人控制在物种扩大其范围的成功中的作用.
主要方法:
- 15种植物物种,包括扩展范围和本地物种,与虫 (射击食草动物) 和虫一起或不一起生长.
- 测量了草食动物对生物质的减少.
- 评估了根区土壤中的病原性影响.
主要成果:
- 扩展范围的植物表现出比本地物种更好的防御射击食草动物 (虫) 和根病原体.
- 虫在扩大范围的物种上表现更差,减少了它们的生物量,比本地物种少.
- 虫在扩展范围和本地植物的表现上没有显著差异.
结论:
- 扩大范围的植物物种拥有针对共同敌人的增强防御能力,这可能有助于它们在新环境中定居.
- 减少敌人控制可能有助于物种的成功,物种因气候变暖而改变范围.
- 这些发现表明,成功的范围扩展者可能会在新息地构成更大的入侵风险.
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