| the hummingbird community and their floral resources in an urban forest remnant in brazil. | the temporal and spatial resource use among hummingbirds was studied over 13 months in an urban forest remnant (prosa state park: psp) in campo grande, mato grosso do sul, brazil. hummingbird visitation was recorded at three ornithophilous and eleven non-ornithophilous species. flower density was roughly constant during the study period, with the density of non-ornithophilous flowers being higher than that of ornithophilous ones. mean values of nectar volume and concentration were similar betwee ... | 2011 | 21881784 |
| flower morphology, nectar features, and hummingbird visitation to palicourea crocea (rubiaceae) in the upper paraná river floodplain, brazil. | we investigated flower morphology, nectar features, and hummingbird visitation to palicourea crocea (rubiaceae), a common ornithophilous shrub found in the riparian forest understory in the upper paraná river floodplain, brazil. flowers are distylous and the style-stamen dimorphism is accompanied by other intermorph dimorphisms in corolla length, anther length, and stigma lobe length and form. we did not observe strict reciprocity in the positioning of stigma and anthers between floral morphs. f ... | 2006 | 16532206 |