• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

A ocorr?ncia de Apiformes (Hymenoptera) em fragmentos da Mata Atl?ntica e respostas ecol?gicas para seu desenvolvimento sustent?vel. / The occurrence of Apiforms (Hymenoptera) in fragments of Atlantic Rainforest and ecological responses for sustainable use.

Braga, Juliana Almeida 15 July 2010 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-04-12T12:14:36Z No. of bitstreams: 1 2010 - Juliana Almeida Braga.pdf: 2354270 bytes, checksum: 98c45e0ebd59588dfab79268b972b77f (MD5) / Made available in DSpace on 2018-04-12T12:14:36Z (GMT). No. of bitstreams: 1 2010 - Juliana Almeida Braga.pdf: 2354270 bytes, checksum: 98c45e0ebd59588dfab79268b972b77f (MD5) Previous issue date: 2010-07-15 / The high species richness of the Atlantic and Amazon rainforests places Brazil as one of the most important repositories of biological diversity worldwide. Unfortunately, some of these protected areas were rapidly degraded. Deforestation, cattle and agriculture expansion, the spread of exotic species are listed as key factors that mitigate the environmental. The effects of these factors on the bee fauna in a short span of time can only be roughly estimated, but predictions for the future are potentially catastrophic. This study aimed to evaluate the bee fauna and flora diversity in fragments of Atlantic rainforest, and to provide information about the geodiversity of the fragments. Samples were taken at four sites of fragments over a year from bees visiting plants. From the survey of environmental conditions close to the fragments we obtained the rates of geodiversity. In all fragments, the inventory showed higher species richness of solitary bees and greater abundance of Meliponina. Compared with other surveys of Atlantic forest, there is a low species richness of fauna and flora melitophily, suggesting that the fragments are unfavorable for the maintenance of bees. The statistical model predicts a decline of flora from the data of bee fauna of the fragments. / A alta riqueza de esp?cies na Floresta Atl?ntica posiciona o Brasil como um dos mais importantes reposit?rios da diversidade biol?gica mundial. Infelizmente, parte destas ?reas de prote??o foi rapidamente degradada; o desflorestamento, a explora??o agr?cola, a propaga??o de esp?cies ex?ticas s?o indicados como os principais fatores que mitigam o meio ambiente. Os efeitos destes fatores sobre a fauna de abelhas em curto espa?o de tempo s? pode ser estimado aproximadamente, mas as previs?es para o futuro s?o potencialmente catastr?ficas. Neste estudo, buscou-se avaliar a diversidade da fauna e flora melit?filas em quatro fragmentos da Floresta Atl?ntica e dispor de informa??es sobre a geodiversidade destes fragmentos. As amostragens foram feitas em quatro localidades de fragmentos florestais de Mata Atl?ntica ao longo de um ano, de abelhas em visita ?s plantas. A partir do levantamento das condi??es ambientais pr?ximas aos fragmentos, foram calculados os ?ndices de geodiversidade. Em todos os fragmentos, o invent?rio das abelhas mostrou maior riqueza de esp?cies de abelhas solit?rias e maior abund?ncia relativa de Meliponina. H? uma baixa riqueza de esp?cies de fauna e flora melit?fila, comparada com outros invent?rios de Mata Atl?ntica, sugerindo que os fragmentos s?o pouco favor?veis para a manuten??o das abelhas. O modelo estat?stico previu um decl?nio de flora a partir dos dados de fauna de abelhas dos fragmentos.

Page generated in 0.0667 seconds