• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 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

Efeitos da antropização da zona costeira sobre as assembléias de aves

Mäder, Aurélea 25 February 2010 (has links)
Made available in DSpace on 2015-03-05T16:20:41Z (GMT). No. of bitstreams: 0 Previous issue date: 25 / Nenhuma / Áreas urbanizadas afetam negativamente a distribuição, abundância e comportamento de aves aquáticas costeiras. Neste estudo nós testamos a hipótese de que áreas costeiras perturbadas pelo homem (1) possui menor abundância e riqueza de aves, (2) diferenciação na composição de espécies e (3) apresenta um padrão temporal de abundância diferente de áreas costeiras não urbanizadas. Para isso, utilizamos 16 sub-áreas na costa do Rio Grande do Sul (8 não-urbanizadas e 8 urbanizadas). Foram registradas 73.893 aves no estudo, destes 46.295 (63%) indivíduos foram registradas no litoral médio (não-urbanizado) e 27.598 (37%); no litoral norte (urbanizado). A riqueza foi similar entre as duas áreas, mas a quantidade de indivíduos que ocorreram nas praias diferiu significativamente. Aves migratórias neárticas, assim como os representantes da ordem sub-ordens Scolopaci e Lari são mais abundantes no litoral médio, enquanto os Ciconiiformes, Falconiformes e Passeriiformes são mais encontrados no litoral norte. Observamos um a / Urbanized areas negatively affect the distribution, abundance and behavior of coastal waterbirds. In this study we tested the hypothesis that coastal areas disturbed by man (1) has a lower abundance and diversity of birds, (2) differentiation in species composition and (3) presents a different temporal pattern of abundance of undeveloped coastal areas. For this, we use 16 sub-areas on the coast of Rio Grande do Sul (8 non-urbanized and urbanized 8). 73 893 birds were recorded in the study, these 46 295 (63%) individuals were recorded on the coast average (non-urbanized) and 27 598 (37%) on the north coast (urbanized). Richness was similar between the two areas, but the amount of individuals that occurred on the beaches differed significantly. Nearctic migratory birds, as well as representatives of the order sub-orders Scolopaci and Lari are more abundant in the coastal average, while Ciconiiformes, Falconiformes and Passeriiformes are mostly found in the north coast. We observed a significant increase for som

Page generated in 0.0774 seconds