Mutualists and antagonists mediate frequency-dependent selection on floral display
2008 (English)In: Ecology, ISSN 0012-9658, E-ISSN 1939-9170, Vol. 89, no 6, 1564-1572 p.Article in journal (Refereed) Published
Theory predicts that, with conflicting selection pressures mediated by mutualists and antagonists, alternative reproductive strategies can be maintained by negative frequency-dependent selection if it results in rare-morph advantage. We combined field experiments and surveys of natural populations to determine whether selection on. oral display is frequency dependent in the self-incompatible herb Primula farinosa, which is polymorphic for inflorescence height and occurs in a short-scaped and a long-scaped morph. Among short-scaped plants, both pollination success, quantified as initiation of fruits and seeds, and seed predation were positively correlated with the relative frequency of the long-scaped morph. The relative strength of these effects and the direction of the resulting frequency-dependent selection on scape morph varied among years and populations. The results suggest that both mutualists and antagonists may mediate frequency-dependent selection and that frequency dependence may vary from positive to negative with rare-morph advantage, depending on the relative strength of these interactions.
Place, publisher, year, edition, pages
2008. Vol. 89, no 6, 1564-1572 p.
alternative reproductive strategies, facilitation, floral display, frequency-dependent selection, genetic diversity, pollination, positive interactions, predation, Primula farinosa, Sweden
Research subject Ecological Botany
IdentifiersURN: urn:nbn:se:uu:diva-96193DOI: 10.1890/07-1283.1ISI: 000256540300010OAI: oai:DiVA.org:uu-96193DiVA: diva2:170687