侵入性的繁殖成功优于其在授粉者排除条件下的本地亲属
G LeFevre1, D Estes1, E Rehm2,3
1Southeastern Grasslands Institute, Center of Excellence for Field Biolog, Austin Peay State University, Clarksville, Tennessee, USA.
Plant biology (Stuttgart, Germany)
|September 24, 2025
概括
授粉者减少对本地植物的伤害比入侵植物更大. 侵入性比本地更能繁殖成功,即使授粉者接触率降低.
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:
- 侵入性物种往往表现出比本地物种更高的繁殖产量.
- 与入侵植物相比,授粉者减少可能会不成比例地影响本地植物的繁殖.
研究的目的:
- 研究授粉者可用性对侵袭性 (Carduus nutans) 和本地野 (Cirsium discolour) 的繁殖成功的影响.
- 在不同的授粉者排斥条件下,比较本地和入侵种的繁殖策略和成功率.
主要方法:
- 在侵袭性Carduus nutans和本地Cirsium discolor上进行了一项授粉者排除实验.
- 授粉者获取被操纵 (部分或完全排除),以评估对繁殖成功的影响,包括种子产量和发芽.
- 研究人员分析了与生殖结果相关的授粉者访问率和社区组成.
主要成果:
- 完全排除授粉者导致繁殖失败的概率显著更高 (55%) 与部分排除或控制 (<7%) 相比.
- 虽然种子产量随着任何级别的授粉者排除而下降,但发芽成功仍然不受影响.
- 侵袭性Carduus nutans表现出比本地Cirsium变色更高的繁殖成功,主要是由于种子产量更大.
结论:
- 授粉者损失对本地和入侵的繁殖物种产生了负面影响.
- 侵袭性Carduus nutans似乎更适应授粉者减少,与本地Cirsium变色相比,其生殖损失较低.
- 了解这些差异性影响对于预测入侵物种的植物群落中授粉者丧失的生态后果至关重要.
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