Journal
IBIS
Volume 159, Issue 3, Pages 638-646Publisher
WILEY
DOI: 10.1111/ibi.12481
Keywords
anthropogenic processes; bird diversity; noise; species richness; urban parks
Categories
Funding
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (Brazil)
- Fundacao Nacional de Desenvolvimento do Ensino Superior Particular (Brazil)
- CAPES [6060-13-7, 1213-13-0]
- Fundacao de Amparoa Pesquisa do Estado de Minas Gerais (Brazil)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Brazil)
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Anthropogenic noise is becoming more prevalent in the world and has been shown to affect many animal species, including birds. The impact of such noise was measured in Neotropical urban parks to assess how the noise affects avifauna diversity and species richness. We sampled bird species, and concurrently measured sound pressure (noise) levels (L-eq, equivalent noise levels) in eight urban green areas or parks located in a large city (Belo Horizonte) in south-eastern Brazil over a 1-year period. The diversity of sampled points was measured by means of total species richness, Fisher's alpha and Shannon-Wiener diversity indices. Noise levels within all parks were greater than those in natural areas. We found that an increase in noise levels and the area of open habitats surrounding sampling points were negatively related to species richness. Social factors reflecting increased urbanization, such as higher incomes, were also negatively correlated with bird species richness. However, noise was the factor that explained most of the variance. These results suggest that anthropogenic noise can have a significant negative impact on the conservation value of urban parks for bird species.
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