Distribuição espacial, fenologia e polinização de bromeliaceae na Mata Atlantica do Alto da Serra de Paranapiacaba, SP

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

This study investigated spacial distribution in sucessional stages, phenology and floral visitors of 16 bromeliad species of Tillandsia (3 spp.), Vriesea (7 spp.), Aechmea (3 spp.), Billbergia (1 sp.) and Nidularium (2 spp.). Field data were collected in an area of Atlantic Rain Forest, situated in the Parque Estadual Intervales, municipality ofRibeirão Grande, state of São Paulo, Brazil. Transects were established in different sucessional stages and individual distribution in vegetation stracta were recorded. Census offlowering phenology and it was made monthly. Frequency of floral visits by hummingbirds was recorded through naturalistic observation. Results indicate that bromeliad species richness is inversely proportional to vegetation disturbance leveI, and that fixation height is significantly different between species, according to their habit and light tolerance. Bromeliad community showed sequencial flowering throughout the year, and most species flowered in the rainy season. Most ofbromeliad species showed the omithophily syndrome, althought some chiropterophilous species and one species with floral morphology intermediary between these two syndromes were also observed. Eight hummingbirds species visited bromeliad flowers. Phaethornis eurynome and Thalurania glaucopis were the most frequent visitors. Flowers of 26 species of other plant families were also visited by hummingbirds, blooming in equivalent intensity in subdry and rainy seasons. Bromeliads were gathered in two groups by similarity analysis of floral visitors (hummingbirds): one more frequently pollinated by species of subfamily Trochilinae and the other by Phaethornis eurynome (subfamily Phaethominae). Distinct spacial distribution and mainly the blooming peak were important factors minimizing competition by pollinators among studied Bromeliaceae species

ASSUNTO(S)

beija-flor polinização mata atlantica bromeliaceae

ACESSO AO ARTIGO

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