Disturbance-dependent spatial distribution of sexes in a gynodioecious understory shrub
نویسندگان
چکیده
منابع مشابه
Site-specific features affect pollination success of a gynodioecious understory shrub in a gender-specific mode1
Daphne laureola (Thymelaeaceae) is a gynodioecious, winter-flowering shrub inhabiting the understory of shady mountain forests. The small, inconspicuous yellowish-green flowers are pollinated by ectothermic insects whose activity is mainly confined to infrequent spells of sunny weather. We tested the hypotheses that (1) the solar irradiance environment of individual D. laureola plants and dista...
متن کاملSize-dependent sex allocation and reproductive investment in a gynodioecious shrub
In sexually dimorphic plants, resource allocation to reproduction often differs between sex morphs. In gynodioecious species, i.e. coexisting hermaphrodite and female plants within a population, females often produce more fruits than hermaphrodites. Since fruit production is costlier than flower production, hermaphrodites and females may regulate flower and fruit production differently in respo...
متن کاملEffects of environmental heterogeneity on the distribution of sexes within and among populations in a gynodioecious species, Geranium maculatum.
Populations containing both females and hermaphrodites (dimorphic) are generally found in drier sites than those with only hermaphrodites (monomorphic). The sex-differential plasticity hypothesis (SDP) suggests that this is caused by hermaphrodites reducing allocation to seeds in harsh environments, allowing female establishment. We proposed that a similar process could explain sex distribution...
متن کاملSex-specific phenotypic selection and geographic variation in gender divergence in a gynodioecious shrub.
In sexually polymorphic plant species the extent of gender divergence in floral morphology and phenology may be influenced by gender-specific selection patterns imposed by pollinators, which may change geographically. Distribution margins are areas where changes in the pollinator fauna, and thus variation in gender divergence of floral traits, are expected. We tested for pollination-driven geog...
متن کاملEcological context of breeding system variation: sex, size and pollination in a (predominantly) gynodioecious shrub.
BACKGROUND AND AIMS Species that exhibit among-population variation in breeding system are particularly suitable to study the importance of the ecological context for the stability and evolution of gender polymorphism. Geographical variation in breeding system and sex ratio of Daphne laureola (Thymelaeaceae) was examined and their association with environmental conditions, plant and floral disp...
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ژورنال
عنوان ژورنال: Basic and Applied Ecology
سال: 2012
ISSN: 1439-1791
DOI: 10.1016/j.baae.2012.08.005