Enemy release from the effects of generalist granivores can facilitate Bromus tectorum invasion in the Great Basin Desert
Enemy release from the effects of generalist granivores can facilitate Bromus tectorum invasion in the Great Basin Desert
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多面食谷类动物的影响释放的敌人可以促进大盆地沙漠中雀麦的入侵
DOI：
10.1002/ece3.5314
复制
发表时间：
2019
影响因子：
2.6
通讯作者：
Callaway, Ragan M.
中科院分区：
文献类型：
--
作者：
Lucero, Jacob E.;Schaffner, Urs;Asadi, Ghorbanali;Bagheri, Alireza;Rajabov, Toshpulot;Callaway, Ragan M.
植物入侵的天敌释放假说（ERH）认为，天敌对入侵植物种群的限制在原生地比在非原生地更大。尽管有相当多的实证关注，但很少有研究直接验证这一观点，特别是关于多面手食草动物。这种知识差距很重要，因为逃避通才的影响是ERH的一个关键方面，这可能有助于解释成功的植物入侵。在这里，我们使用消费者暴露和种子添加实验来对比食食性啮齿动物（一个重要的多面手行会）对欺诈草（Bromus tectorum）在西亚（欺诈草是本地的）和美国大盆地沙漠（欺诈草是外来的和高度入侵的）建立的影响。与ERH一致的是，啮齿动物的觅食减少了西亚近60%的欺骗草的建立，但在大盆地没有影响。这一主要结果与区域特异性的觅食模式相一致：相对于来自本地竞争对手的种子，大盆地（而不是西亚）的啮齿动物通常会避免来自作弊草的种子。我们的研究结果表明，敌人从一个重要的通才协会的影响中释放出来，可能有助于大盆地作弊草的爆炸性成功。这些发现证实了关于敌人释放的经典理论，并扩展了我们对通才如何影响外来植物入侵轨迹的理解。
The enemy release hypothesis (ERH) of plant invasion asserts that natural enemies limit populations of invasive plants more strongly in native ranges than in non‐native ranges. Despite considerable empirical attention, few studies have directly tested this idea, especially with respect to generalist herbivores. This knowledge gap is important because escaping the effects of generalists is a critical aspect of the ERH that may help explain successful plant invasions. Here, we used consumer exclosures and seed addition experiments to contrast the effects of granivorous rodents (an important guild of generalists) on the establishment of cheatgrass (Bromus tectorum) in western Asia, where cheatgrass is native, versus the Great Basin Desert, USA, where cheatgrass is exotic and highly invasive. Consistent with the ERH, rodent foraging reduced cheatgrass establishment by nearly 60% in western Asia but had no effect in the Great Basin. This main result corresponded with a region‐specific foraging pattern: rodents in the Great Basin but not western Asia generally avoided seeds from cheatgrass relative to seeds from native competitors. Our results suggest that enemy release from the effects of an important guild of generalists may contribute to the explosive success of cheatgrass in the Great Basin. These findings corroborate classic theory on enemy release and expand our understanding of how generalists can influence the trajectory of exotic plant invasions.
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DOI：
--
发表时间：
2018
期刊：
影响因子：
--
作者：
S. E. Phillips
通讯作者：
S. E. Phillips
影响因子：
4.5
作者：
T. Stewart;P. Allen;Susan E. Meyer
通讯作者：
Susan E. Meyer
来自本地啮齿动物的谷物和来自外来入侵者的竞争强烈且同样地限制了本地草的建立
影响因子：
2.7
作者：
Jacob E. Lucero;R. Callaway
通讯作者：
R. Callaway
本地食谷动物减少了本地草类的生长，但没有减少入侵的无芒雀麦
影响因子：
2.9
作者：
Jacob E. Lucero;R. Callaway
通讯作者：
R. Callaway
影响因子：
56.9
作者：
BROWN, JH;HESKE, EJ
通讯作者：
HESKE, EJ