uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Facilitation in an insect pollinated herb with a floral display dimorphism
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Ecological Botany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Ecological Botany.
2006 (English)In: Ecology, ISSN 0012-9658, E-ISSN 1939-9170, Vol. 87, no 8, 2113-2117 p.Article in journal (Refereed) Published
Abstract [en]

Population context should influence pollination success and selection on. oral display in animal-pollinated plants because attraction of pollinators depends not only on the characteristics of individual plants, but also on the attractiveness of co-occurring conspecifics. The insect-pollinated herb Primula farinosa is polymorphic for inflorescence height. Natural populations may include both long-scaped plants, which present their flowers well above the soil surface, and short-scaped plants, with their flowers positioned close to the ground. We experimentally tested whether seed production in short-scaped P. farinosa varied with local morph frequency and surrounding vegetation height. In tall vegetation, short-scaped plants in polymorphic populations produced more fruit and tended to produce more seeds than short-scaped plants did in monomorphic populations. In low vegetation, population composition did not significantly affect fruit and seed output of short-scaped plants. The results suggest that long-scaped plants facilitate short-scaped plants in terms of pollinator attraction and that the facilitation effect is contingent on the height of the surrounding vegetation. The documented facilitation should contribute to the maintenance of the scape length polymorphism in ungrazed areas where litter accumulates and vegetation grows tall.

Place, publisher, year, edition, pages
2006. Vol. 87, no 8, 2113-2117 p.
Keyword [en]
alternative reproductive strategies, facilitation, floral display, plant height, pollination, positive interactions, predation, Primula farinosa
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-96192ISI: 000239833400028PubMedID: 16937650OAI: oai:DiVA.org:uu-96192DiVA: diva2:170686
Available from: 2007-09-21 Created: 2007-09-21 Last updated: 2017-01-25Bibliographically approved
In thesis
1. Pollinators, Enemies, Drought, and the Evolution of Reproductive Traits in Primula farinosa
Open this publication in new window or tab >>Pollinators, Enemies, Drought, and the Evolution of Reproductive Traits in Primula farinosa
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis, I combined comparative and experimental approaches to examine selection on reproductive traits and population differentiation in the insect-pollinated, self-incompatible, perennial herb Primula farinosa. More specifically, I (1) determined whether the effects of floral display and interactions with pollinators and seed predators, and plant reproductive success were frequency-dependent and affected by surrounding vegetation context, (2) examined the consequences of intermittent drought years on population dynamics using numerical simulations based on demographic data collected over seven years, (3) analyzed among-population differentiation in flowering phenology and reproductive allocation, and its relationship to soil-depth at the site of origin.

A field experiment suggested that conspicuous plants facilitate inconspicuous plants in terms of pollinator attraction, and that the facilitation effect is contingent on the height of the surrounding vegetation. Further experiments revealed that both mutualistic and antagonistic interactions can result in frequency-dependent selection on floral display. Among inconspicuous plants, both fruit initiation, and damage from seed predators increased with the proportion of the conspicuous morph. The relative strength of these effects, and therefore their net outcome on the relationship between morph ratio and seed production varied among years.

I combined information on vital rates and their relation to environmental conditions in simulations to predict future population viability in changing environments. Simulated stochastic population growth rate decreased with increasing frequency of drought years.

Reproductive allocation varied significantly among populations both in the field and in a common-garden experiment, but was correlated with soil depth at the site of origin only in the field. The results suggest that among-population variation in reproductive effort in the field mainly reflects plastic responses to environmental conditions, and that this plasticity may be adaptive. The common-garden experiment suggested that the study populations have diverged genetically in flowering time.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 41 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 341
Keyword
Ecology, Alternative reproductive strategies, climate change, facilitation, floral display, flowering phenology, frequency-dependent selection, genetic diversity, life-history strategies, local adaptation, pollination, predation, Primula farinosa, reproductive effort, soil disturbance, stochastic growth rate, Ekologi
National Category
Ecology Evolutionary Biology
Identifiers
urn:nbn:se:uu:diva-8207 (URN)978-91-554-6965-8 (ISBN)
Public defence
2007-10-12, Föreläsningssalen, Avdelningen för växtekologi, Villavägen 14, Uppsala, 10:00
Opponent
Supervisors
Available from: 2007-09-21 Created: 2007-09-21 Last updated: 2016-04-25Bibliographically approved

Open Access in DiVA

No full text

PubMed

Authority records BETA

Toräng, PerÅgren, Jon

Search in DiVA

By author/editor
Toräng, PerÅgren, Jon
By organisation
Ecological Botany
In the same journal
Ecology
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

pubmed
urn-nbn

Altmetric score

pubmed
urn-nbn
Total: 504 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf