Costs and benefits of reproducing under unfavorable conditions: an integrated view of ecological and physiological constraints in a cerrado shrub

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dc.contributor.authorSilveira, Fernando A. O.
dc.contributor.authorSantos, Jean C.
dc.contributor.authorFranceschinelli, Edivani V.
dc.contributor.authorMorellato, Leonor Patricia C. [UNESP]
dc.contributor.authorFernandes, G. Wilson
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.contributor.institutionUniversidade Federal de Uberlândia (UFU)
dc.contributor.institutionUniversidade Federal de Goiás (UFG)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionStanford University
dc.date.accessioned2015-10-21T13:13:00Z
dc.date.available2015-10-21T13:13:00Z
dc.date.issued2015-07-01
dc.description.abstractDisentangling the relative importance of biotic and abiotic constraints in plant reproduction is a major challenge in reproductive ecology. Here, we tested the 'resource limitation hypothesis'that predicts a high-level ovule abortion under resource scarcity; the 'flowering displacement hypothesis'that predicts low levels of pollen limitation driven by relaxed competition for pollinators; and the 'herbivory escape hypothesis'that predicts low impact by natural enemies during unfavorable conditions. We followed reproductive phenology, measured the seasonal variation in resource abundance, and calculated initial ovule budgets to estimate the relative importance of each limiting factor on final reproductive output. Ovule fate was determined of ovules in different positions within the pods, and a germination experiment was conducted to identify bottlenecks at the germination stage. Despite marked decreases in resource availability during the dry season, reproduction consistently occurred during mid-to-late dry season. Destruction by natural enemies and abortion were the most likely ovule fates, with only 2.2 % of flower buds converted into ripe fruits. Ovule fates were not random along fruit positions, with higher likelihood of well-formed seeds in fruit tips and higher likelihood of ovule abortion and non-fertilized ovules near the fruit bases. The benefits derived from flowering displacement to the dry season include reduced competition for pollinators and synchronization of seedling establishment with the onset of the rainy season. However, we found no support for the herbivory escape hypothesis. We argue that a cost-benefit approach is a useful framework to understand the evolutionary ecology of phenological strategies in seasonal environments.en
dc.description.affiliationUniversidade Federal de Uberlândia - Instituto de Biologia, Uberlândia, Brazil
dc.description.affiliationDepartamento de Botânica, Universidade Federal de Goiás, Goiânia, Brazil
dc.description.affiliationDepartamento de Botânica, Instituto de Biociências,Universidade Estadual Paulista (UNESP), Ria Claro, Brazil
dc.description.affiliationUniversidade Federal de Minas Gerais - Ecologia Evolutiva & Biodiversidade, Belo Horizonte, Brazil
dc.description.affiliationDepartment of Biology, Stanford University, Stanford, CA 94305, USA
dc.description.affiliationUnespUniversidade Estadual Paulista, Ria Claro, Brazil - Departamento de Botânica, Instituto de Biociências
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)
dc.description.sponsorshipIdCNPq: 486742/2012-1
dc.format.extent963-974
dc.identifierhttp://link.springer.com/article/10.1007%2Fs11258-015-0482-8
dc.identifier.citationPlant Ecology. Dordrecht: Springer, v. 216, n. 7, p. 963-974, 2015.
dc.identifier.doi10.1007/s11258-015-0482-8
dc.identifier.issn1385-0237
dc.identifier.lattes1012217731137451
dc.identifier.urihttp://hdl.handle.net/11449/128746
dc.identifier.wosWOS:000356372800005
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofPlant Ecology
dc.relation.ispartofjcr1.759
dc.relation.ispartofsjr0,914
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCerradoen
dc.subjectOvule fateen
dc.subjectPhenologyen
dc.subjectPollen limitationen
dc.subjectPre-dispersal seed predationen
dc.subjectResource limitationen
dc.titleCosts and benefits of reproducing under unfavorable conditions: an integrated view of ecological and physiological constraints in a cerrado shruben
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.lattes1012217731137451
unesp.author.orcid0000-0001-9050-8577[3]
unesp.author.orcid0000-0001-5265-8988[4]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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