Densidade populacional de aves em uma floresta de terra firme da Amazônia Central
Estimates of population densities enable many ecological studies, comparisons between species, sites or moments in time, aside from actions of monitoring and conservation. Among the Amazonian organisms, birds represent one of the most well known groups, but they still lack consistent estimates of th...
| Autor principal: | Soto, Nayara Tartari |
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| Grau: | Dissertação |
| Idioma: | por |
| Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11975 http://lattes.cnpq.br/1233086672530253 |
| Resumo: |
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Estimates of population densities enable many ecological studies, comparisons between species, sites or moments in time, aside from actions of monitoring and conservation. Among the Amazonian organisms, birds represent one of the most well known groups, but they still lack consistent estimates of their population densities. We estimated the population density of 109 bird species based on distance sampling and evaluated the relationship between density, probability of detection and body mass of the species. Data were collected from 2005 to 2009 in variable circular plot distance sampling in the Ducke, ZF-2 and ZF-3 reserves, northen region of Manaus, Amazonas, Brazil, as part of the Tropical Ecology, Assessment and Monitoring (TEAM) project. The overall average (and standard error, hereafter) density estimated was 9.3 ± 9.0 individuals/km². Forty-five species had densities ≤ five individuals/km² and only ten species had densities above 20 individuals/km². Species classed in the literature as “common” differed from those considered “uncommon” in mean estimated density (10.3 ± 9.5 and 4.8 ± 3.9, respectively), but with a large overlap between them. The population density was negatively related to the probability of detection and there was no relationship between density and body mass. Probability of detection was positively related to body mass. We suggest that the estimated densities in this paper shall serve as a reference for the birds in the region north of Manaus, making feasible also studies related to conservation. |