Mestrado em Biodiversidade Tropical

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http://repositorio.ufes.br/handle/10/17603

Nível: Mestrado Acadêmico
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Navegando Mestrado em Biodiversidade Tropical por Assunto "Abelha"

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    Abelhas Euglossina (Hymenoptera, Apidae) em Remanescentes Florestais da Hiléia Baiana: Padrões de Aninhamento e Efeitos das Características dos Fragmentos na Estrutura das Assembleias
    (Universidade Federal do Espírito Santo, 2016-08-22) Coswosk, Judson Albino; Faria Junior, Luis Roberto Ribeiro; Tosta, Vander Calmon; Guerra Sobrinho, Thatiana; Campos, Lucio Antonio de Oliveira
    Habitat loss and fragmentation are among the most important threats to biodiversity conservation in tropical forests. Euglossina bees (Hymenoptera, Apidae) were used as a model for the study of hypotheses related to habitat loss and fragmentation in Hileia Baiana, an important center of wealth and endemism in the Atlantic Forest. The objectives of this study were: (i) to test the hypothesis that the characteristics of the fragments (size, shape and vegetation cover) affect the structure pattern of Euglossina bees assemblages; (Ii) evaluate if the distribution of the species follows a nested pattern and if the characteristics of the fragments (size, shape and vegetation cover) are environmental gradients underlying the nesting pattern. The data were obtained from 13 forest remnants in the northern state of Espírito Santo, ranging in size from 5 to 265 ha. Sampling was performed in two stages: the first from November 2014 to February 2015 and the second from August to September 2015. The remnants were proportionally sampled in their areas, using traps with aromatic baits to attract and capture bees. A total of 3,094 bees of 19 species were captured in the remaining 13 samples. Only the fragment size explained the variation in abundance and species richness, acting as a limiting factor to the persistence of sensitive species found in large and preserved fragments of the region. The distribution of the species follows a nested pattern influenced by the size of the fragment, revealing that processes of selective and ordered extinction of forest dependent species have occurred in the small sampled remnants.
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    Fauna de abelhas nativas de duas áreas de restinga do Parque Estadual de Itaúnas, Espírito Santo, Brasil
    (Universidade Federal do Espírito Santo, 2015-03-17) Receputi, Ana Luiza Morati; Faria, Luis Roberto Ribeiro; Tosta, Vander Calmon; 1º membro da banca
    Two studies were carried out in this dissertation: (i) the inventory of the native bee fauna (regarding species richness, diversity and composition) in forestal and herbaceous/shrubby restinga at the Parque Estadual de Itaúnas, Espírito Santo, Brasil, and (ii) the inventory of orchid-bee fauna (also comprising species richness, diversity and composition) in the same areas. Both studies aimed at answering two directly related questions: 1) Are the composition, richness and diversity of native bee and orchid-bee faunas in forest and herbaceous/shrubby restinga different? 2) Are these faunas more related, respectively, to forest formations or to open formations? Sampling was carried out monthly from November/2013 to August/2014, using traps to attract male orchid-bees and hand nets to collect bees in general on flowers. In both areas 2.448 individuals were sampled, belonging to 71 species. From these, 300 individuals belonging to 45 species were sampled in the forest resting, and 486 individuals belonging to 40 species were sampled in the herbaceous/shrubby resting, using hand nets. Regarding orchid-bees, 838 males belonging to 17 species were sampled in the forest resting, and 824 males belonging to 12 species were sampled in the herbaceous/shrubby restinga. Results suggest that in both cases, the species compositions of the two areas are different and richness and diversity were greater in forest restinga areas. As for the native bees fauna, considering species richness and composition, the faunas of the Parque Estadual de Itaúnas were more similar to open formation and/or modified areas and with severe characteristics. The orchid-bee faunas from both areas were characterized by the presence of species with high plasticity, related to their presence in locations with different vegetation structure, species that are apparently associated with open and/or edge environments and, in the forest restinga, the fauna was also characterized by the presence of species with greater association with forests and preserved environments. The original prediction that the restinga forest fauna would be more related to forest areas while that of the herbaceous/shrubby would be more related to those of open areas was not totally confirmed.
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    Relações filogenéticas do gênero Partamôna Schwarz, 1939 (Hymenoptera/apidae) com ênfase no grupo Cupira
    (Universidade Federal do Espírito Santo, 2016-08-23) Rossin, Gabrielly Silva; Werneck, Hugo de Azevedo; Tosta, Vander Calmon; Faria Junior, Luiz Roberto Ribeiro; Paresque, Roberta; Campos, Lucio Antonio de Oliveira