73 resultados para oceanic archipelago


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado em Tecnologia e Segurança Alimentar

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Tese de Doutoramento, Ciências do Mar (Ecologia Marinha)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Tese de Doutoramento, Ciências do Mar (Biologia Marinha)

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Copyright © 2014 Société Française d'Ichtyologie.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado em Vulcanologia e Riscos Geológicos

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado em Geologia do Ambiente e Sociedade.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The BALA project (Biodiversity of Arthropods of Laurisilva of the Azores) is a research initiative to quantify the spatial distribution of arthropod biodiversity in native forests of the Azores archipelago. Arthropods were collected using a combination of two techniques, targeting epigean (ground dwelling) and canopy (arboreal) arthropods: pitfall traps (with Turquin and Ethylene solutions) and beating samples (using the three most dominant plant species). A total of 109 transects distributed amongst 18 forest fragments in seven of the nine Azorean islands were used in this study. The performance of alternative sampling methods and effort were tested. No significant differences were found in the accumulated number of species captured whether an alternative method was used or whether another transect with similar effort was established in another location within the same fragment. A combination of Ethylene and Turquin traps captured more species per individual, Turquin and beating captured more species per sample, and Turquin captured more species per unit time. An optimization exercise was performed and we found that the protocol applied during recent years is very close to optimal, allowing its future replication with confidence. The minimum combinations of sampling effort and methods, in order to monitor or to inventory diversity, taking into account different proportions of sample completeness are discussed.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The Late Miocene Malbusca outcrop is located in the southeastern coast of Santa Maria Island (Azores, NE Atlantic), interspersed in volcanic formations. At ~20 meters above present sea level, a prominent discontinuous layer of rhodoliths seizes with an extension of ~250 meters. This paper presents the first taxonomic record of fossil rhodolith forming coralline algae for the Miocene of the Azores. The preserved taxonomic features used were the following: (1) arrangement of basal filaments, (2) epithallial cells (when observable), (3) presence of cell fusions, (4) conceptacle type, (5) number of cells layers which conceptacle chamber floors are situated below the surrounding thallus surface and (6) for the sporangial pores, the orientation of the filaments around the conceptacle pores. Based on these characters, six taxa were identified encompassing three Corallinaceae (Lithophyllum prototypum, Lithophyllum sp., Spongites sp., Hydrolithon sp.) and one Hapalidaceae (Phymatolithon calcareum and cf. Phymatolithon sp.). An unidentified coaxial thallus was also present, the coaxial construction ascribing the specimens to the genus Mesophyllum or Neogoniolithon. Taxonomic accounts for the identified taxa are described, illustrated and an identification key is provided. The report of L prototypum represents the first Miocene record and the preservation of the specimens is very good. Miocene coralline algae seem very consistent among deposits but some species are relevant for particular areas, like in the Azores.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Tese de Doutoramento em Ciências Económicas e Empresariais, especialidade em Desenvolvimento Regional.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado em Ciências Sociais.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Dissertação de Mestrado em Tecnologia e Segurança Alimentar.