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Ecological change may be a common initiator of evolutionary pollinator shifts.

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Title: Ecological change may be a common initiator of evolutionary pollinator shifts.
Authors: Dellinger, Agnes S.1 (AUTHOR) agnes.dellinger@univie.ac.at
Source: New Phytologist. Jun2026, Vol. 250 Issue 6, p3572-3583. 12p.
Subjects: Pollination, Macroevolution, Angiosperms, Ecological disturbances, Macroecology, Abiotic environment, Plant species
Abstract: Summary: Although evolutionary pollinator shifts are accepted as major sources of floral and species diversity in angiosperms, the mechanisms triggering pollinator shifts remain largely unexplored. In 1970, Stebbins proposed that ecological change may be a common initiator of evolutionary pollinator shifts, but empirical tests of Stebbins' hypothesis remain scarce. The lack of studies exploring the drivers of pollinator shifts likely stem from the lack of a clear definition of ecological change, and the inherent challenges of studying past evolutionary events empirically. I here propose a definition of ecological change as any abiotic or biotic macro‐ or microecological, extrinsic or intrinsic change that significantly alters the effectiveness of a taxon's ancestral pollinator(s). Because such ecological change may happen at different scales, I argue that taking an integrative macro–micro‐evolutionary approach will allow us to test where and when which type of ecological change is a common driver of pollinator shifts. I propose macroevolutionary tests of abiotic macroecological change as a driver of pollinator shifts as the easiest and most effective method, allowing for the comparison of a large number of independent shifts to establish whether there are broad generalities in evolutionary pollinator shifts, and determine when and where there are not. [ABSTRACT FROM AUTHOR]
Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Ecological change may be a common initiator of evolutionary pollinator shifts.
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  Data: <searchLink fieldCode="AR" term="%22Dellinger%2C+Agnes+S%2E%22">Dellinger, Agnes S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> agnes.dellinger@univie.ac.at</i>
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  Data: <searchLink fieldCode="JN" term="%22New+Phytologist%22">New Phytologist</searchLink>. Jun2026, Vol. 250 Issue 6, p3572-3583. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Pollination%22">Pollination</searchLink><br /><searchLink fieldCode="DE" term="%22Macroevolution%22">Macroevolution</searchLink><br /><searchLink fieldCode="DE" term="%22Angiosperms%22">Angiosperms</searchLink><br /><searchLink fieldCode="DE" term="%22Ecological+disturbances%22">Ecological disturbances</searchLink><br /><searchLink fieldCode="DE" term="%22Macroecology%22">Macroecology</searchLink><br /><searchLink fieldCode="DE" term="%22Abiotic+environment%22">Abiotic environment</searchLink><br /><searchLink fieldCode="DE" term="%22Plant+species%22">Plant species</searchLink>
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  Data: Summary: Although evolutionary pollinator shifts are accepted as major sources of floral and species diversity in angiosperms, the mechanisms triggering pollinator shifts remain largely unexplored. In 1970, Stebbins proposed that ecological change may be a common initiator of evolutionary pollinator shifts, but empirical tests of Stebbins' hypothesis remain scarce. The lack of studies exploring the drivers of pollinator shifts likely stem from the lack of a clear definition of ecological change, and the inherent challenges of studying past evolutionary events empirically. I here propose a definition of ecological change as any abiotic or biotic macro‐ or microecological, extrinsic or intrinsic change that significantly alters the effectiveness of a taxon's ancestral pollinator(s). Because such ecological change may happen at different scales, I argue that taking an integrative macro–micro‐evolutionary approach will allow us to test where and when which type of ecological change is a common driver of pollinator shifts. I propose macroevolutionary tests of abiotic macroecological change as a driver of pollinator shifts as the easiest and most effective method, allowing for the comparison of a large number of independent shifts to establish whether there are broad generalities in evolutionary pollinator shifts, and determine when and where there are not. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of New Phytologist is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/nph.71170
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      – Code: eng
        Text: English
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      – SubjectFull: Pollination
        Type: general
      – SubjectFull: Macroevolution
        Type: general
      – SubjectFull: Angiosperms
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      – SubjectFull: Ecological disturbances
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      – SubjectFull: Macroecology
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      – SubjectFull: Abiotic environment
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      – SubjectFull: Plant species
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      – TitleFull: Ecological change may be a common initiator of evolutionary pollinator shifts.
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              Text: Jun2026
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              Y: 2026
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