连续的割草对其本土范围内的有害和入侵性杂草Solanum elaeagnifolium的花防御有不同的影响
Alejandro Vasquez1, Alexa Alaniz2, Robert Dearth2
1Department of Entomology and Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA.
Scientific reports
|April 7, 2024
概括
不断的割草会改变银叶夜影 (Solanum elaeagnifolium) 的花特征,并增加对草食动物的防御能力. 这种干扰会影响植物与昆虫的相互作用,影响毛虫生长和植物管理策略.
科学领域:
- 生态生态学 生态生态学
- 植物科学 植物科学
- 城市生态城市生态学
背景情况:
- 干扰会影响植物生命史和食用相互作用.
- 割草是城市生态系统的一个关键干扰.
- 以前的研究表明,连续割草可以提高银叶夜影 (SLN) 的健身和叶子防御.
研究的目的:
- 为了研究连续割草对Solanum elaeagnifolium花防御系统的影响.
- 为了比较割和未割的SLN种群中的花特征和食草动物抵抗力.
主要方法:
- 实地研究比较了德克萨斯州南部的剪毛和未剪毛的SLN种群.
- 分析花的特征 (大小,重量) 和脊柱密度.
- 虫 (Manduca sexta) 的食试验使用来自剪切和未剪切的花朵的人工食.
主要成果:
- 修剪的SLN花更大但更轻;经常修剪的花更重和更大.
- 修剪的植物表现出更高的脊柱密度,导致未修剪的花朵的草食动物损伤更少.
- 后来,在未割的饮食中,幼虫的质量大大增加,而在高割频率的饮食中,幼虫的质量更大.
结论:
- 割草损害了SLN中的花特征,但增强了植物对草食动物的防御能力.
- 在花防御中受到干扰的变化影响了草食动物的表现.
- 管理策略应考虑割草对植物防御和草食动物相互作用的影响.
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