Revealing the ecological content of long-duration audio-recordings of the environment through clustering and visualisation
| Autor: | Paul Roe, Michael Towsey, Yvonne F. Phillips |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Arthropoda Computer science Bioacoustics Equipment lcsh:Medicine 010603 evolutionary biology 01 natural sciences Birds Ornithology Animals Cluster Analysis Audio Equipment lcsh:Science Cluster analysis Animal Signaling and Communication Short duration Ecosystem Behavior Multidisciplinary Animal Behavior Ecology Physics 010604 marine biology & hydrobiology Ecology and Environmental Sciences lcsh:R Organisms Biology and Life Sciences Eukaryota Acoustics Biodiversity Invertebrates Visualization Insects Quiet Physical Sciences Vertebrates Amniotes Engineering and Technology lcsh:Q Bird Song Microphones Zoology Environmental Monitoring Research Article |
| Zdroj: | PLoS ONE, Vol 13, Iss 3, p e0193345 (2018) PLoS ONE |
| ISSN: | 1932-6203 |
| Popis: | Audio recordings of the environment are an increasingly important technique to monitor biodiversity and ecosystem function. While the acquisition of long-duration recordings is becoming easier and cheaper, the analysis and interpretation of that audio remains a significant research area. The issue addressed in this paper is the automated reduction of environmental audio data to facilitate ecological investigations. We describe a method that first reduces environmental audio to vectors of acoustic indices, which are then clustered. This can reduce the audio data by six to eight orders of magnitude yet retain useful ecological information. We describe techniques to visualise sequences of cluster occurrence (using for example, diel plots, rose plots) that assist interpretation of environmental audio. Colour coding acoustic clusters allows months and years of audio data to be visualised in a single image. These techniques are useful in identifying and indexing the contents of long-duration audio recordings. They could also play an important role in monitoring long-term changes in species abundance brought about by habitat degradation and/or restoration. |
| Databáze: | OpenAIRE |
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