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带我去骑车:食草动物可以促进植物重新入侵
Lauren L Sullivan1,2,3,4,5, Allison K Shaw5
1Department of Plant Biology, Michigan State University, East Lansing, Michigan, USA.
Ecology
|June 28, 2023
概括
草食动物可以改变植物入侵速度. 虽然负面影响缓慢传播,但积极的分散效应可以加速传播,特别是在低草食压力下,但高压会导致崩.
科学领域:
- 生态生态学 生态生态学
- 侵袭生物学 侵袭生物学
- 数学建模的数学建模
背景情况:
- 草食动物通过人口统计和分散来影响植物入侵.
- 人口影响是可以理解的,但分散效应 (负面或积极) 需要进一步研究.
- 了解草食动物驱动的空间传播对于预测植物移动至关重要.
研究的目的:
- 调查草食动物如何影响植物种群传播率.
- 确定草食动物促进或阻碍植物传播的条件.
- 模拟草食动物对人口和分散的影响之间的相互作用.
主要方法:
- 开发了一个阶段结构的整微分方程模型.
- 纳入草食动物对植物人口结构和分散的影响.
- 在不同的草食动物压力下模拟了七种草食动物"综合征".
主要成果:
- 仅仅是对人口或分散的负面草食动物影响,持续缓慢植物的传播.
- 当分散受到积极影响时,植物传播速度对草食动物压力表现出形反应.
- 高的草食动物压力导致所有模拟综合征的人口崩.
结论:
- 草食动物可以加速或减缓植物入侵.
- 对分散的积极影响可能会超过负面的人口影响,在低草食动物水平上促进传播.
- 洞察力有助于管理入侵,促进本地重新殖民,并预测全球变化下的范围变化.
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