Do rewardless orchids show a positive relationship between phenotypic diversity and reproductive success?
Fiche du document
- doi: 10.1890/05-1445
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.1890/05-1445
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pmid/17479761
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pissn/0012-9658
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_0A9C6966C94B6
info:eu-repo/semantics/openAccess , Copying allowed only for non-profit organizations , https://serval.unil.ch/disclaimer
Sujets proches
Personal development Growth (Psychology) Personal growth Self-improvementCiter ce document
A. Smithson et al., « Do rewardless orchids show a positive relationship between phenotypic diversity and reproductive success? », Serveur académique Lausannois, ID : 10.1890/05-1445
Métriques
Partage / Export
Résumé
Among rewardless orchids, pollinator sampling behavior has been suggested to drive a positive relationship between population phenotypic variability and absolute reproductive success, and hence population fitness. We tested this hypothesis by constructing experimental arrays using the rewardless orchid Dactylorhiza sambucina, which is dimorphic for corolla color. We found no evidence that polymorphic arrays had higher mean reproductive success than monomorphic arrays for pollinia removal, pollen deposition, or fruit set. For pollinia removal, monomorphic yellow arrays had significantly greater reproductive success, and monomorphic red the least. A tendency for yellow arrays to have higher pollen deposition was also found. We argue that differential population fitness was most likely to reflect differential numbers of pollinators attracted to arrays, through preferential long-distance attraction to arrays with yellow inflorescences. Correlative studies of absolute reproductive success in 52 populations of D. sambucina supported our experimental results. To our knowledge this is the first study to suggest that attraction of a greater number of pollinators to rewardless orchids may be of greater functional importance to population fitness, and thus ecology and conservation, than are the behavioral sequences of individual pollinators.