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A geographical perspective on the relationship between Impatiens spur lengths and bill lengths of sunbirds in Afrotropical mountains
Ecology and Evolution ( IF 2.3 ) Pub Date : 2021-02-10 , DOI: 10.1002/ece3.7258
David Hořák 1 , Štěpán Janeček 1
Affiliation  

Trait matching—a correlation between the morphology of plants and their pollinators—has been frequently observed in pollination interactions. Different intensities of natural selection in individual regions should cause such correlations to be observable across different local assemblages. In this study, we focused on matching between spur lengths of the genus Impatiens and bill lengths of sunbirds in tropical Africa. For 25 mountain and island locations, we compiled information about the composition and traits of local Impatiens and sunbird assemblages. We found that assemblage mean and maximum values of bill lengths were positively correlated with mean and maximum spur lengths across locations. Moreover, our results suggest that the positive correlations hold only for forest sunbird assemblages sharing the same habitat with Impatiens species. We further show that long‐billed sunbirds seem to locally match the morphology of multiple Impatiens plant species, not vice versa. Our observation implies that trait matching significantly contributes to structuring of Impatiens–sunbird pollination systems. We suggest that special habitat preferences together with spatial isolation of mountain environment might play a role in this case.

中文翻译:


非洲热带山区凤仙花刺长与太阳鸟喙长关系的地理视角



性状匹配(植物形态与其传粉媒介之间的相关性)在授粉相互作用中经常被观察到。各个地区不同强度的自然选择应该导致在不同的当地组合中可以观察到这种相关性。在这项研究中,我们重点研究了热带非洲凤仙花属的刺长度和太阳鸟的喙长度之间的匹配。我们针对 25 个山区和岛屿地点,收集了有关当地凤仙花和太阳鸟组合的组成和特征的信息。我们发现,钞票长度的组合平均值和最大值与各个位置的平均和最大支线长度呈正相关。此外,我们的结果表明,正相关仅适用于与凤仙花物种共享相同栖息地的森林太阳鸟群。我们进一步表明,长嘴太阳鸟似乎在局部与多种凤仙花植物物种的形态相匹配,反之亦然。我们的观察表明,性状匹配对凤仙花-太阳鸟授粉系统的构建有显着贡献。我们认为,特殊的栖息地偏好以及山区环境的空间隔离可能在这种情况下发挥作用。
更新日期:2021-04-04
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