InteraÃÃes entre plantas e abelhas nas matas ciliares do Rio SÃo Francisco

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The Apoidea constitute a monophyletic group which devolved numerous relations with plants and are the main pollinators of the SÃo Francisco river gallery forest and of the Caatinga. However, their diversity is poorly known. Studies on the apifauna composition and its associated flora were conducted during one year in this environment. The analyses on the species composition of the Euglossini showed that common Atalntic Forest species (Euglossa imperialis, E. truncata e Eulaema cingulata) also occurred in the study site, where 3873 bees of 137 species were collected. Of these, various non-described species and a new genus were confirmed. In the dry period was registered the highest species richness (82 spp. and 1388 individuals) while the rainy period presented the highest abundance (2485 and 55spp.). Pollination case studies were conducted with Melochia tomentosa and Parkinsonia aculeata, plant species that showed to be important sources of floral resources for many bees collected in the inventory: 1) Individuals of Melochia tomentosa (Sterculiaceae), which have short-styled and long-styled flowers, with hercogamy and reciprocal dicogamy were studied; the long-styled flowers were protogynous and the short-styled, protandrous. Parkinsonia aculeata (Caesalpiniaceae) showed the highest attractiveness to medium to large sized bees that perceived the color change in the standard petal. This petal showed an important role on the signalization of the post-change floral fase, when there are no more resources. Thus, the plant reduces the geitonogamy rate and increases the cross-polination rate.

ASSUNTO(S)

rio sÃo francisco euglossini caatinga matas ciliares bee-plant interaction botanica polination gallery forest interaÃÃo â abelha e planta sÃo francisco river

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