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首页> 外文期刊>Journal of Pollination Ecology >A tight relationship between the solitary bee Calliopsis (Ceroliopoeum) laeta (Andrenidae, Panurginae) and Prosopis pollen hosts (Fabaceae, Mimosoideae) in xeric South American woodlands
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A tight relationship between the solitary bee Calliopsis (Ceroliopoeum) laeta (Andrenidae, Panurginae) and Prosopis pollen hosts (Fabaceae, Mimosoideae) in xeric South American woodlands

机译：南美干性林地中的单生蜂Calliopsis（Ceroliopoeum）laeta（Andrenidae，Panurginae）和Prosopis花粉寄主（Fabaceae，Mimosoideae）之间的紧密关系

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The large genus Calliopsis (Andrenidae, Panurginae) is composed of ten subgenera with polylectic and presumably oligolectic species. These categories have been mainly developed from floral visits of female bees collecting pollen. In the present study, pollen analyses of nest provisions and scopal loads from museum specimens of the monotypic subgenus Ceroliopoeum were carried out to assess its degree of specialization to pollen host-plants. Despite the great variability of floral resources close to two active nest aggregations in the Chaco sites (83 and 44 melittophilous taxa from 36 and 17 families, respectively), the only host-plant recorded in all nest pollen samples was Prosopis. This genus was represented by six species and their hybrids, all having similar pollen morphology. The nesting sites in Monte scrub also contained several Prosopis species, some of which had different pollen morphology from those of the Chaco forest. Two different Prosopis pollen types were identified in all samples. Since the whole geographic distribution of C. laeta matches with the range of Prosopis, its strong association with this pollen host seems to be well supported. However, the low number of study populations (four) could erroneously indicate oligolectism. A broader sampling is necessary to ensure the character of specialization. Most Calliopsis species have been identified as oligolectic. Yet, this categorization has mainly been based on floral visits and a large diversity of floral hosts has been recorded for each bee species. Further analyses are necessary to confirm the relationship of this genus with its pollen hosts. Moreover, as most of them have short to medium phenologies (up to 4 months) their presumably oligolecty can be due to a local specialization (i.e. variable according to location) typical of polylecty. NOTE: Supporting information to this article may be found in the left menu.
机译：大型Calliopsis属（Andrenidae，Panurginae）由十个亚属组成，具有多向性和大概为低聚性。这些类别主要是从收集花粉的雌蜂的花访中发展而来的。在本研究中，进行了花粉分析，该花粉分析来自单一型拟南芥（Ceroliopoeum）的博物馆标本中的巢供应和足负荷，以评估其对花粉寄主植物的专业化程度。尽管Chaco站点中接近两个活动巢聚集的花卉资源差异很大（分别来自36和17个家庭的83和44个嗜嗜性类群），但在所有巢花粉样品中记录的唯一寄主植物是Prosopis。该属由六个具有相似花粉形态的物种及其杂种所代表。蒙特灌木丛中的筑巢点还包含几种Prosopis种类，其中一些花粉形态与Chaco森林的花粉形态不同。在所有样品中鉴定出两种不同的Prosopis花粉类型。由于C. laeta的整个地理分布与Prosopis的范围相吻合，因此似乎很好地支持了与该花粉宿主的紧密联系。但是，研究人群的数量很少（四个）可能会错误地表明寡头。必须进行更广泛的采样以确保专业化的特征。大多数Calliopsis种已被鉴定为低聚的。然而，这种分类主要是基于花的拜访，并且记录了每种蜜蜂种类的大量花寄主。需要进一步分析以确认该属与其花粉宿主的关系。此外，由于它们中的大多数都具有短至中度的物候（长达4个月），因此，其推测寡头现象可能是由于多义性典型的局部专业化（即根据位置而异）所致。注意：在左菜单中可以找到本文的支持信息。

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