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dc.contributor.authorVerdú, Miguel-
dc.contributor.authorGarcía-Fayos, P.-
dc.identifier.citationPlant Ecology 135(1): 95-101 (1998)es_ES
dc.description7 páginas, 2 figuras, 3 tablas.es_ES
dc.description.abstractSex ratios of populations of the dioecious shrub Pistacia lentiscus L. (Anacardiaceae) were studied. Several hypotheses concerning biased sex ratios were tested. The expected pattern of male preponderance in stressful habitats was not found. The populations located in a microclimatic gradient, such as a slope, did not display a male-biased sex ratio on the stressful middle slope. The populations located in a climatic gradient did not display a male-biased sex ratio in the more xeric habitats. Testing the hypothesis of female preponderance when pollen grain competition exists, we found a significant correlation in the direction opposite to that predicted by this hypothesis. Low density of individuals (an estimate of pollen density) correlates with a high preponderance of females but the sex ratio approaches 1:1 when density increases. This correlation should have an upper threshold in 1:1 because male-biased sex ratios have never been found.es_ES
dc.description.sponsorshipWe especially thank R.M. López for helping in data collection.We are also very grateful to P. Jordano and M. A. Pérez for their suggestions during the work and to E. Font and S. S. S. Sarma for their constructive comments on the manuscript.We want to acknowledge D. Wotton for language correction and J. I. Hormaza and V. S. Polito for providing useful information on sex determination in Pistacia. J. I. Hormaza also provided the Russian references and revised themanuscript. The IVEI (project 02–046) and Caixa Sagunt provided financial support.es_ES
dc.subjectMediterranean shrublandes_ES
dc.subjectPistacia lentiscuses_ES
dc.subjectPollen competitiones_ES
dc.subjectSpatial segregation of the sexeses_ES
dc.titleFemale biased sex ratios in Pistacia lentiscus L. (Anacardiaceae)es_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderInstitució Valenciana d'Estudis i Investigació-
dc.contributor.funderLa Caixa-
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