The effect of multiple host species on a keystone parasitic plant and its aphid herbivores

The effect of multiple host species on a keystone parasitic plant and its aphid herbivores
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多种寄主物种对关键寄生植物及其蚜虫食草动物的影响

DOI:
10.1111/1365-2435.12281
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发表时间:
2014
期刊:
影响因子:
5.2
通讯作者:
Rowntree J
Rowntree J
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Rowntree J

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不同的生物体对共有资源的利用是生态群落结构的基础。半寄生植物和以它们为食的食草昆虫都直接或间接地依赖于寄生植物提供的资源。因此,我们认为,本文研究了单种和多种寄主植物对广生寄生植物Rhinanthus minor生物量和蚜虫数量的影响(棉蚜)寄生虫生物量与吸器连接到寄主根的数量成正比,并由寄主物种身份决定,比主机功能组。寄主种类对蚜虫种群数量也有重要影响,寄生于百脉根上的寄生虫对蚜虫的取食作用明显减弱,寄生于多种寄主上的寄生虫对蚜虫种群数量的影响取决于寄主种类的组合。然而,主机的混合物一般有利于蚜虫稀释的负面影响,特定的主机species.Our研究结果表明,主机附件的特异性改变了这种关键的寄生植物对自己的食草动物的影响,并可能对更广泛的植物和食草动物社区。
The exploitation of shared resources by diverse organisms underpins the structure of ecological communities. Hemiparasitic plants and the insect herbivores feeding on them both rely, directly and indirectly, on the resources supplied by the parasite's host plant. Therefore, the identity and number of host plant species providing these resources is likely to be critical for parasite and herbivore performance.We tested the effect of single and multiple host species on the biomass of the generalist parasitic plantRhinanthus minorand the abundance of its aphid (Aphis gossypii) herbivores.Parasite biomass was proportional to the number of haustorial connections to host roots and was determined by host species identity rather than host functional group. Host species identity was also an important influence on aphid population size, and parasites attached toLotus corniculatusexperienced a considerable reduction in aphid herbivory.The effects on the parasite attaching to multiple hosts depended on the combination of species present. However, host mixtures generally benefitted aphids by diluting the negative effects of particular host species.Our findings suggest that the specificity of host attachment alters the impact of this keystone parasitic plant on its own herbivores and, potentially, on the wider plant and herbivore community.
DOI: 10.1111/j.0022-0477.2004.00929.x
发表时间: 2004
期刊: Journal of Ecology
影响因子: 5.5
作者:
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DOI: 10.1111/j.1469-8137.1993.tb03871.x
发表时间: 1993
期刊: The New phytologist
影响因子: --
作者:
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寄主对半寄生植物食草和授粉的影响
DOI: --
发表时间: 2002
期刊:
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DOI: 10.2307/2265537
发表时间: 1996-07-01
期刊: ECOLOGY
影响因子: 4.8
作者:
Marvier, MA
通讯作者: Marvier, MA
DOI: 10.1111/j.1399-3054.1993.tb01787.x
发表时间: 1993
影响因子: 6.4
作者:
W. Seel;R. Cooper;M. Press
通讯作者: M. Press