Macroevolution of the plant-hummingbird pollination system.

Publisher: Cambridge University Press Country of Publication: England NLM ID: 0414576 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1469-185X (Electronic) Linking ISSN: 00063231 NLM ISO Abbreviation: Biol Rev Camb Philos Soc Subsets: MEDLINE

Original Publication: London, Cambridge University Press.

Plants*/genetics ; Birds*/genetics ; Pollination*; Biological Coevolution

Plant-hummingbird interactions are considered a classic example of coevolution, a process in which mutually dependent species influence each other's evolution. Plants depend on hummingbirds for pollination, whereas hummingbirds rely on nectar for food. As a step towards understanding coevolution, this review focuses on the macroevolutionary consequences of plant-hummingbird interactions, a relatively underexplored area in the current literature. We synthesize prior studies, illustrating the origins and dynamics of hummingbird pollination across different angiosperm clades previously pollinated by insects (mostly bees), bats, and passerine birds. In some cases, the crown age of hummingbirds pre-dates the plants they pollinate. In other cases, plant groups transitioned to hummingbird pollination early in the establishment of this bird group in the Americas, with the build-up of both diversities coinciding temporally, and hence suggesting co-diversification. Determining what triggers shifts to and away from hummingbird pollination remains a major open challenge. The impact of hummingbirds on plant diversification is complex, with many tropical plant lineages experiencing increased diversification after acquiring flowers that attract hummingbirds, and others experiencing no change or even a decrease in diversification rates. This mixed evidence suggests that other extrinsic or intrinsic factors, such as local climate and isolation, are important covariables driving the diversification of plants adapted to hummingbird pollination. To guide future studies, we discuss the mechanisms and contexts under which hummingbirds, as a clade and as individual species (e.g. traits, foraging behaviour, degree of specialization), could influence plant evolution. We conclude by commenting on how macroevolutionary signals of the mutualism could relate to coevolution, highlighting the unbalanced focus on the plant side of the interaction, and advocating for the use of species-level interaction data in macroevolutionary studies.
(© 2024 The Authors. Biological Reviews published by John Wiley & Sons Ltd on behalf of Cambridge Philosophical Society.)

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787638 H2020 European Research Council; SR200100005 Australian Research Council; A1-S-26134 Consejo Nacional de Ciencia y Tecnología; 312580/2020-7 Conselho Nacional de Desenvolvimento Científico e Tecnológico; 173342 Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; 310030_197201 Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; 31003A_175655 Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; IZSEZ0_202372 Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung

Keywords: coevolution; foraging behaviour; mutualism; pollination syndrome; pollinator shifts; specialization; trait evolution; trait matching

Date Created: 20240505 Date Completed: 20240930 Latest Revision: 20240930

20240930

10.1111/brv.13094

38705863