The cobblers stick to their lasts: pollinators prefer native over alien plant species in a multi-species experiment
The cobblers stick to their lasts: pollinators prefer native over alien plant species in a multi-species experiment
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DOI：
10.1007/s10530-013-0474-3
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发表时间：
2013-11-01
影响因子：
2.9
通讯作者：
van Kleunen, Mark
中科院分区：
文献类型：
--
作者：
Chrobock, Thomas;Winiger, Pius;van Kleunen, Mark
大多数植物物种至少部分依赖于动物授粉。我们对传粉者访视在本地和外来植物物种之间以及入侵和非入侵外来物种之间是否存在差异的认识仍然有限。此外，由于许多入侵植物都是从园艺中逃脱的，因此需要研究从人类辅助在城市化栖息地的发生到（半）自然栖息地的无辅助持续和传播的转变。为了研究传粉者访视在本地、入侵和非入侵外来物种之间是否存在差异，我们对代表5个植物科的17种植物进行了传粉者观察。为了验证三种物种在入侵初期的传粉者访视是否依赖于生境类型，我们在3个城市化生境和3个半自然草地上进行了单盆栽研究。本土植物的花单位比外来植物多但小，外来入侵植物的花单位比非入侵植物多但小。在考虑了这些花展示的差异后，传粉者访花率在本土植物物种中高于外来植物物种，但在入侵和非入侵植物物种之间没有差异。不论植物物种的来源或状态如何，半自然生境的传粉者访粉量平均高于城市化生境。这可能表明，一旦外来物种成功地从城市化逃到更自然的栖息地，传粉者的限制将不再是建立和入侵的主要障碍。
The majority of plant species rely, at least partly, on animals for pollination. Our knowledge on whether pollinator visitation differs between native and alien plant species, and between invasive and non-invasive alien species is still limited. Additionally, because numerous invasive plant species are escapees from horticulture, the transition from human-assisted occurrence in urbanized habitats to unassisted persistence and spread in (semi-)natural habitats requires study. To address whether pollinator visitation differs between native, invasive alien and non-invasive alien species, we did pollinator observations for a total of 17 plant species representing five plant families. To test whether pollinator visitation to the three groups of species during the initial stage of invasion depends on habitat type, we did the study in three urbanized habitats and three semi-natural grasslands, using single potted plants. Native plants had more but smaller flower units than alien plants, and invasive alien plants had more but smaller flowers than non-invasive alien plants. After accounting for these differences in floral display, pollinator visitation was higher for native than for alien plant species, but did not differ between invasive and non-invasive alien plant species. Pollinator visitation was on average higher in semi-natural than in urbanized habitats, irrespective of origin or status of the plant species. This might suggest that once an alien species has managed to escape from urbanized into more natural habitats, pollinator limitation will not be a major barrier to establishment and invasion.