Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil

Protected areas (PAs) monitoring is a technical bottleneck that limits the implementation of decision-making processes for natural resource and wildlife management. Recent methodological advances make passive acoustic monitoring and associated acoustic index analysis an increasingly suitable method...

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Autores principales:	Ivan Braga Campos, Rachel Fewster, Anthony Truskinger, Michael Towsey, Paul Roe, Demival Vasques Filho, William Lee, Anne Gaskett
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Bioacoustics Ecoacoustics Acoustic indices Acoustic region Monitoring Protected areas Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/da17501488ec47fdb23b240b4200ca61
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spelling	oai:doaj.org-article:da17501488ec47fdb23b240b4200ca612021-12-01T04:30:34ZAssessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil1470-160X10.1016/j.ecolind.2020.106953https://doaj.org/article/da17501488ec47fdb23b240b4200ca612021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X2030892Xhttps://doaj.org/toc/1470-160XProtected areas (PAs) monitoring is a technical bottleneck that limits the implementation of decision-making processes for natural resource and wildlife management. Recent methodological advances make passive acoustic monitoring and associated acoustic index analysis an increasingly suitable method for PAs monitoring. Acoustic indices are mathematical filters that can provide standardised comparative information about the acoustic energy, which can be applied to compare communities. In this study we test whether acoustic indices are sufficiently sensitive to detect differences in the soundscape within each of the four seasons between a PA (the Serra do Cipó National Park, Brazil) and a surrounding farmland area. Statistical analysis of results from 12 acoustic indices is used to identify which of 20 acoustic regions, defined by frequency range and time period, present the greatest differences between the two sites. The soundscapes of the two sites differed most in autumn within the acoustic region 6, representing 05:30 – 09:00am and a range of 0.988–3.609 kHz. This acoustic region exhibited significant differences for all the 12 indices tested. Visual examination of 65 long-duration false-colour (LDFC) spectrograms resulted in the selection of 865 (from 1365) sound files with acoustic events within the range of acoustic region 6. Sonotype analysis of the 865 files showed that the soundscape outside the park is strongly influenced by human activity, with domestic animals rare in the park soundscape (1% of the sound files), but very common in the surrounding farmland environment (63% of the sound files). The main goal of monitoring programmes detecting biodiversity trends across space and time, which is here achieved via passive acoustic monitoring and acoustic indices. This confirms the utility of the techniques used here for PA monitoring, especially for detecting trends in anthropogenic disturbance, which is a common threat to natural habitats in parks and reserves in the tropics.Ivan Braga CamposRachel FewsterAnthony TruskingerMichael TowseyPaul RoeDemival Vasques FilhoWilliam LeeAnne GaskettElsevierarticleBioacousticsEcoacousticsAcoustic indicesAcoustic regionMonitoringProtected areasEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106953- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Bioacoustics Ecoacoustics Acoustic indices Acoustic region Monitoring Protected areas Ecology QH540-549.5
spellingShingle	Bioacoustics Ecoacoustics Acoustic indices Acoustic region Monitoring Protected areas Ecology QH540-549.5 Ivan Braga Campos Rachel Fewster Anthony Truskinger Michael Towsey Paul Roe Demival Vasques Filho William Lee Anne Gaskett Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
description	Protected areas (PAs) monitoring is a technical bottleneck that limits the implementation of decision-making processes for natural resource and wildlife management. Recent methodological advances make passive acoustic monitoring and associated acoustic index analysis an increasingly suitable method for PAs monitoring. Acoustic indices are mathematical filters that can provide standardised comparative information about the acoustic energy, which can be applied to compare communities. In this study we test whether acoustic indices are sufficiently sensitive to detect differences in the soundscape within each of the four seasons between a PA (the Serra do Cipó National Park, Brazil) and a surrounding farmland area. Statistical analysis of results from 12 acoustic indices is used to identify which of 20 acoustic regions, defined by frequency range and time period, present the greatest differences between the two sites. The soundscapes of the two sites differed most in autumn within the acoustic region 6, representing 05:30 – 09:00am and a range of 0.988–3.609 kHz. This acoustic region exhibited significant differences for all the 12 indices tested. Visual examination of 65 long-duration false-colour (LDFC) spectrograms resulted in the selection of 865 (from 1365) sound files with acoustic events within the range of acoustic region 6. Sonotype analysis of the 865 files showed that the soundscape outside the park is strongly influenced by human activity, with domestic animals rare in the park soundscape (1% of the sound files), but very common in the surrounding farmland environment (63% of the sound files). The main goal of monitoring programmes detecting biodiversity trends across space and time, which is here achieved via passive acoustic monitoring and acoustic indices. This confirms the utility of the techniques used here for PA monitoring, especially for detecting trends in anthropogenic disturbance, which is a common threat to natural habitats in parks and reserves in the tropics.
format	article
author	Ivan Braga Campos Rachel Fewster Anthony Truskinger Michael Towsey Paul Roe Demival Vasques Filho William Lee Anne Gaskett
author_facet	Ivan Braga Campos Rachel Fewster Anthony Truskinger Michael Towsey Paul Roe Demival Vasques Filho William Lee Anne Gaskett
author_sort	Ivan Braga Campos
title	Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
title_short	Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
title_full	Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
title_fullStr	Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
title_full_unstemmed	Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil
title_sort	assessing the potential of acoustic indices for protected area monitoring in the serra do cipó national park, brazil
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/da17501488ec47fdb23b240b4200ca61
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Assessing the potential of acoustic indices for protected area monitoring in the Serra do Cipó National Park, Brazil

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