Abstract：
PREMISE OF THE STUDY:Geographic differences in flower visitor assemblages might lead to among-population differences in the magnitude and pattern 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 short- and 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.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Lázaro A,Santamaría Ldoi
10.3732/ajb.1500336subject
Has Abstractpub_date
2016-02-01 00:00:00pages
325-36issue
2eissn
0002-9122issn
1537-2197pii
ajb.1500336journal_volume
103pub_type
杂志文章abstract：:The utility of regression and correspondence models for deducing climate from leaf physiognomy was evaluated by the comparative application of different predictive models to the same three leaf assemblages. Mean annual temperature (MAT), mean annual precipitation (MAP), and growing season precipitation (GSP) were esti...
journal_title：American journal of botany
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journal_title：American journal of botany
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doi：
更新日期：1998-06-01 00:00:00
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doi：
更新日期：1997-07-01 00:00:00
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journal_title：American journal of botany
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doi：
更新日期：2000-02-01 00:00:00
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更新日期：2011-11-01 00:00:00
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journal_title：American journal of botany
pub_type： 杂志文章
doi：
更新日期：2001-05-01 00:00:00
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doi：
更新日期：2000-08-01 00:00:00
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更新日期：2007-05-01 00:00:00
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更新日期：1997-12-01 00:00:00
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