系统地减少自然敌人和在变量降水中进行竞争,使得草 (Cenchrus ciliaris) 在其原生范围内的入侵程度接近
Aaron C Rhodes1, Robert M Plowes1, Elizabeth A Bowman1,2
1Brackenridge Field Laboratory The University of Texas at Austin Austin Texas USA.
Ecology and evolution
|May 13, 2024
概括
侵袭性水牛草在自然敌人和竞争对手在其本土范围被移除时繁荣发展. 了解这些相互作用是管理侵入性草和保护生物多样性的关键.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 植物群体之间的相互作用
背景情况:
- 侵入性草,如草,严重破坏生态系统和生物多样性.
- 了解自然敌人和植物竞争在规范入侵物种中的作用至关重要.
- 在入侵物种的原生范围内的自然压力因素的相互作用尚未得到充分理解.
研究的目的:
- 为了调查自然敌人和植物竞争对手如何调节其本土范围内的侵入性水牛草.
- 检查自然压力因素在降水梯度上的相互作用影响.
- 评估消除各种自然敌人的影响对水牛草的入侵性.
主要方法:
- 在肯尼亚莱基皮亚 (Laikipia) 的降水梯度上进行长期类动物排斥实验.
- 嵌套治疗包括剪切 (植物竞争),全身杀虫剂 (昆虫) 和杀菌剂 (真菌同伴).
- 监测了水牛草的生产力,繁殖,昆虫食草和真菌爆发,考虑到气候变化.
主要成果:
- 当从各种自然压力因素中释放时,水牛草的入侵性增加.
- 自然敌人和降水相互作用,影响草的生产力.
- 跨物种植物竞争减少了水牛草的基底面积,表明了生物耐药性.
- 杀虫剂和杀菌剂的影响最小;在无类动物的地区,茎的昆虫增加.
- 一个污秽真菌爆发与可变的降水模式相关联.
结论:
- 减少自然敌人和竞争对手,以及特定的相互作用,可以增强与buffelgrass入侵性相关的特征.
- 来自本地竞争对手的生物耐药性在调节侵入性草方面发挥着作用.
- 降水变化等环境因素与自然敌人相互作用,塑造入侵物种的动态.
- 为了有效管理入侵物种,需要对压力因素的复杂相互作用进行进一步的研究.
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