Anthropogenic noise reduces bird species richness and diversity in urban parks

Ibis - Tập 159 Số 3 - Trang 638-646 - 2017
Alyne Perillo1, Luiz Gabriel Mazzoni1, Luiza Passos2,3, Vinícius Donisete Lima Rodrigues Goulart2,3, Charles Duca4, Robert J. Young1,3
1Conservation, Ecology and Animal Behaviour Group, Prédio 41, Mestrado em Zoologia Pontifícia Universidade Católica de Minas Gerais Av. Dom José Gaspar, 500 ‐ Coração Eucarístico CEP 30535‐610 Belo Horizonte MG Brazil
2CAPES Foundation Ministry of Education of Brazil Brasília DF 70040‐020 Brazil
3School of Environment and Life Sciences, Peel Building, University of Salford Manchester, Salford, M5 4WT, UK
4Ciências Biológicas Universidade Vila Velha Rua Comissário José Dantas de Mello, 21 – Boa Vista Vila Velha ES Brazil

Tóm tắt

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 (Leq, 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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