Pollen transfer from invasive Carpobrotus spp. to natives -: A study of pollinator behaviour and reproduction success
Pollen transfer from invasive Carpobrotus spp. to natives -: A study of pollinator behaviour and reproduction success
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DOI：
10.1016/j.biocon.2007.09.005
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发表时间：
2008-01-01
影响因子：
5.9
通讯作者：
Traveset, Anna
中科院分区：
文献类型：
--
作者：
Jakobsson, Anna;Padron, Benigno;Traveset, Anna
入侵植物物种对本地群落组成的影响是有据可查的，但对其潜在的机制却知之甚少。尤其缺乏关于对生物相互作用的影响的知识，例如本土植物与它们的传粉者之间的关系。在这项研究中，我们调查了入侵和高产粉量的Carpobrotus spp.影响三个本地物种的种子产量和/或种子质量。我们监测了传粉者在传粉者和本地柱头上的运动和花粉载量，并在田间授粉实验中调查了入侵花粉对生殖的影响。入侵花粉附着在传粉者身上，传粉者从Carpobrotus spp.对于本地人来说，入侵的花粉被转移到本地柱头上，这影响了一个物种的种子生产。尽管所有可能的干扰种子生产的步骤都被定性地采取了，但入侵花粉对土著群落的影响可能很小，因为入侵花粉转移到土著社区的频率很低。然而，授粉交互作用可能会随着植物丰度的变化而改变，我们的研究提供了从Carpobrotus spp.对原住民的影响确实发生了，并有可能影响种子生产。我们发现，共享传粉者的物种认同是重要的，较高的花稳定性和较低的花粉附着能力可能会导致较小的侵入性花粉转移。(C)2007爱思唯尔有限公司。保留所有权利。
The influence of invasive plant species on native community composition is well-documented, but less is known about underlying mechanisms. Especially scarce is knowledge about effects on biotic interactions such as relationships between native plants and their pollinators. In this study we investigate if pollen transfer from the invasive and highly pollen productive Carpobrotus spp. affects seed production and/or seed quality in three native species. We monitored pollinator movements and pollen loads on pollinators and native stigmas, and in a field pollination experiment we investigated the effect of invasive pollen on reproduction. Invasive pollen adhered to pollinators, pollinators switched from Carpobrotus spp. to natives, invasive pollen was transferred to native stigmas, and it affected seed production in one species. Although all possible steps for interference with seed production were found to be qualitatively taken, invasive pollen has probably little impact on the native community because the frequency of invasive pollen transfer to natives was low. However, pollination interactions may change with plant abundance and our study provides evidence that pollen transfer from Carpobrotus spp. to natives does occur and have the potential to affect seed production. We found the species identity of shared pollinators to be of importance, higher flower constancy and lower capacity of pollen adherence are likely to result in less invasive pollen transfer. (c) 2007 Elsevier Ltd. All rights reserved.