Natural selection on floral traits of Lobelia (Lobeliaceae): spatial and temporal variation
نویسندگان
چکیده
منابع مشابه
Natural selection on floral traits of Lobelia (Lobeliaceae): spatial and temporal variation.
The strength and direction of natural selection on floral traits can vary spatially and temporally because of variation in the biotic and abiotic environment. High spatial variation in selection should lead to differentiation of floral traits among populations. In contrast, high temporal variation in selection should retard the evolution of population-specific floral phenotypes. To determine th...
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Herbivores that oviposit in flowers of animal-pollinated plants depend on pollinators for seed production and are therefore expected to choose flowers that attract pollinators. This provides a mechanism by which seed herbivores and pollinators could impose conflicting selection on floral traits. We measured phenotypic selection on floral traits of Lobelia siphilitica (Lobeliaceae) via female fi...
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Understanding temporal variation in selection in natural populations is necessary to accurately estimate rates of divergence and macroevolutionary processes. Temporal variation in the strength and direction of selection on sex-specific traits can also explain stasis in male and female phenotype and sexual dimorphism. I investigated changes in strength and form of viability selection (via predat...
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ژورنال
عنوان ژورنال: American Journal of Botany
سال: 2003
ISSN: 0002-9122,1537-2197
DOI: 10.3732/ajb.90.9.1333