Abstract
In a soundscape, in addition to biophonic (animal) and geophonic (natural, non-biological) sounds, we can find anthropophonic sounds (produced by humans and their creatures) that can reduce species fitness. The aim of this study is to understand the anthropogenic sounds that affect the Parque Natural Municipal de Nova Iguaçu (PNMNI) and whether they impact mammals. PNMNI is a forest remnant located in the metropolitan region of Rio de Janeiro. The sounds were recorded with autonomous recorders (audiomoth) and the mammals were recorded with camera traps in 11 sampling units 1 km apart. The recorders were turned on for 24 hours, generating 120s files every 300s at a frequency of 96kHz. Habitat measurements were made in each sampling unit. We created anthropophonic sound models in the Arbimon platform to analyze the sounds. We used multivariate analysis to reduce the dimensionality of the data, followed by multiple regression. The amount of airplane sounds was the largest and masked the other anthropophonic sounds (fireworks, engines, gunshots and human voices). The days of the week with the highest occurrence of sounds were Saturday, Wednesday and Thursday and airplane sounds, from Tuesday to Thursday. We recorded 17 species of mammals, the most frequent being those weighing up to 6 kg. Both habitat measurements and sounds explained the structuring of the mammal assemblage. Anthrophonic sounds affected the species, which presented higher occurrences the further away from the sounds. Noise pollution constitutes another impact that affects the use and quality of the environment by animals.
Presenters
Helena BergalloProfessor, Ecology, Rio de Janeiro State University, UERJ, Rio de Janeiro, Brazil
Details
Presentation Type
Paper Presentation in a Themed Session
Theme
Assessing Impacts in Diverse Ecosystems
KEYWORDS
Sound Pollution, Mammal Assemblage, Urban Ecology, Atlantic Forest
