Publication details.

Paper

Year:2016
Author(s):A. Lázaro, L. Santamaría
Title:Flower-visitor selection on floral integration in three contrasting populations of Lonicera implexa
Journal:AMERICAN JOURNAL OF BOTANY
ISSN:0002-9122
JCR Impact Factor:3.05
Volume:103
Issue No.:2
Pages:325-336
D.O.I.:10.3732/ajb.1500336
Web:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959131299&doi=10.3732%2fajb.1500336&partnerID=40&md5=e926a3a7236b15bdae29dbdc64ea0cd5
Abstract:PREMISE OF THE STUDY: Geographic differences in flower visitor assemblages might lead to among-population differences in the magnitude and pat- tern of floral integration. However, the role of current pollinator visitation in shaping the magnitude and pattern of floral trait correlations is still controversial. METHODS: We used individual-level data on floral morphology, flower visitation, and fitness to assess if floral integration (at flower and floral-module level) and the covariance structure of floral traits varied among three populations of Lonicera implexa differing in the importance of long-tongue (hawk moths) and short-tongue (bees and small beetles) pollinators; and to assess whether this variation was related to the selection pressures exerted by flower visitors. KEY RESULTS: Short-tongue pollinators preferentially visited plants with floral traits that enhanced flower accessibility; consequently, there was directional selection for accessibility (integration at floral-module level) in the populations where they dominated or codominated. In the population with both shortand long-tongue pollinators, disruptive selection on corolla width and directional selection against whole-flower integration was also found. Dominance by long-tongue pollinators (hawk moths) resulted in disruptive selection on whole-flower integration. Overall, the conflicting selection pressures that were found matched among-population differences in covariance structure: populations with short-tongue pollinators showed correlations between corolla-tube width and other floral traits that were absent in the population pollinated primarily by hawk moths. CONCLUSIONS: Conflicting selection on floral integration mediated by floral visitors can occur even in nearby populations of a species with restricted floral morphology. © 2016 Botanical Society of America.

Related staff

  • Amparo Lazaro Castillo
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  • Ecology and Evolution