title: How little is too little?: The adaptive value of floral integration.
abstract: For more than a century the idea that natural selection favors high levels of floral integration has prevailed as a paradigm among floral biologists. However, there is very little empirical evidence of the adaptive value of floral integration. In this addendum we highlight an important result derived from an empirical study complemented with a literature review and mathematical simulations. Results indicated that intrafloral integration but not floral integration was selected among four species of Rosaceae. The literature review coupled with null models revealed that flowering plants have on average lower than expected levels of floral integration. Mathematical simulations further demonstrated that observed levels of floral integration might result from selection favoring increased intrafloral integration. Altogether, these findings suggest that in most flowering plants, floral integration has a low adaptive value and could be a by-product of selection favoring intrafloral integration.
authors.affiliation: Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México.
authors.forename: Juan
authors.initials: J
authors.lastname: Fornoni
authors.forename: Karina
authors.initials: K
authors.lastname: Boege
authors.forename: César A
authors.initials: CA
authors.lastname: Domínguez
authors.forename: Mariano
authors.initials: M
authors.lastname: Ordano
references.citation: J Evol Biol. 2007 Sep;20(5):1730-8
references.pmid: 17714290
references.citation: Am Nat. 2001 Mar;157(3):245-61
references.pmid: 18707288
references.citation: New Phytol. 2008;179(4):1183-1192
references.pmid: 18547375
references.citation: Evolution. 1983 Nov;37(6):1210-1226
references.pmid: 28556011
references.citation: Br Foreign Med Chir Rev. 1862 Oct;30(60):312-318
references.pmid: 30163543