Floral integration, phenotypic covariance structure and pollinator variation in bumblebee-pollinated Helleborus foetidus
نویسندگان
چکیده
منابع مشابه
Changes in pollinator fauna affect altitudinal variation of floral size in a bumblebee-pollinated herb
Geographic trait variations are often caused by locally different selection regimes. As a steep environmental cline along altitude strongly influences adaptive traits, mountain ecosystems are ideal for exploring adaptive differentiation over short distances. We investigated altitudinal floral size variation of Campanula punctata var. hondoensis in 12 populations in three mountain regions of cen...
متن کاملGeographical variation in autonomous self-pollination levels unrelated to pollinator service in Helleborus foetidus (Ranunculaceae).
Autonomous self-pollination may be considered as a mechanism enhancing plant reproductive success when plant access to pollen sources may limit seed production. We have studied the relationship between geographical patterns of variation in pollinator service to Helleborus foetidus and self-pollination ability in three widely spaced regions in the Iberian Peninsula. As could be expected from its...
متن کاملPlant traits, environmental factors, and pollinator visitation in winter-flowering Helleborus foetidus (Ranunculaceae).
BACKGROUND AND AIMS This study examined the effect of plant traits and environmental factors on pollinator visitation in the winter-flowering Helleborus foetidus (Ranunculaceae) in three distant regions in the Iberian Peninsula. METHODS Geographical variation in floral visitor assemblage, plant traits and environmental factors were analysed during the flowering season. KEY RESULTS Differenc...
متن کاملPost-floral perianth functionality: contribution of persistent sepals to seed development in Helleborus foetidus (Ranunculaceae).
The perianth persists after flowering in many plants, yet its post-floral functionality has been little investigated, and the few studies available provide ambiguous evidence. This paper tests the hypothesis that the green persistent sepals of the perennial herb, Helleborus foetidus, contribute to the plant's fitness by enhancing seed number and/or size. Post-floral contribution of the calyx to...
متن کاملExperimental floral and inflorescence trait manipulations affect pollinator preference and function in a hummingbird-pollinated plant.
PREMISE OF THE STUDY Controversy is ongoing regarding the importance of pollinator-mediated selection as a source of observed patterns of floral diversity. Although increasing evidence exists of pollinator-mediated selection acting on female reproductive success, there is still limited understanding of pollinator-mediated selection on floral traits via male reproductive success. Here we quantif...
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ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2002
ISSN: 1010-061X,1420-9101
DOI: 10.1046/j.1420-9101.2002.00365.x