Establishing the adequacy of recorded acoustic surveys of forest bird assemblages

The use of programmable acoustic recorders to survey forest birds is increasing owing to a range of advantages over surveys conducted by human observers. Users of these devices require a methodological framework for designing and testing a proposed survey protocol in context, to be assured that it h...

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Autores principales:	Michael J. M. Franklin, Richard E. Major, Michael Bedward, Ross A. Bradstock
Formato:	article
Lenguaje:	EN
Publicado:	Resilience Alliance 2020
Materias:	audio survey biodiversity conservation incidence-based coverage multispecies occupancy modeling passive acoustic monitoring sound recorder species detection probability standardized search survey completeness Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/284efd1a8c794c9f9e00fe985f2c9adc
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id	oai:doaj.org-article:284efd1a8c794c9f9e00fe985f2c9adc
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spelling	oai:doaj.org-article:284efd1a8c794c9f9e00fe985f2c9adc2021-12-02T12:29:08ZEstablishing the adequacy of recorded acoustic surveys of forest bird assemblages1712-6568https://doaj.org/article/284efd1a8c794c9f9e00fe985f2c9adc2020-06-01T00:00:00Zhttp://www.ace-eco.org/vol15/iss1/art8/https://doaj.org/toc/1712-6568The use of programmable acoustic recorders to survey forest birds is increasing owing to a range of advantages over surveys conducted by human observers. Users of these devices require a methodological framework for designing and testing a proposed survey protocol in context, to be assured that it has the capacity to efficiently meet the requirements of their study. We aimed to demonstrate how a potential acoustic survey protocol may be effectively tested by comparison with either (1) an observer-based method using species detection probabilities, or (2) the survey completeness levels among a set of other candidate acoustic protocols. Surveys using acoustic recordings (manually processed) and standardized area searches were conducted over the same period in dry sclerophyll forests of southeastern Australia. A multispecies occupancy modeling framework was used to obtain estimates of the probability of detecting individual species for both standardized searches and an acoustic protocol representing similar temporal sampling effort. Detection probabilities for 73% of species recorded using these methods were greater with the acoustic protocol than standardized searches, which established its adequacy for particular research questions. The survey methods resulted in a similar pattern of detection probabilities for foraging stratum guilds, although members of the canopy/subcanopy guild were less likely to be detected using both methods. Survey completeness (species detected/total species) was adopted as an alternative framework for acoustic protocol evaluation. The complete acoustic data set was (1) used with the incidence-based coverage estimator (ICE) to obtain the total number of species, and (2) subsampled to produce a candidate set of potentially useful survey protocols. Completeness levels ranged from 62% to 73% in the set, which provided options for subsequent protocol selection. Other ecologists may adopt one of the frameworks to establish the adequacy of their own acoustic survey protocol to suit their research question and available resources.Michael J. M. FranklinRichard E. MajorMichael BedwardRoss A. BradstockResilience Alliancearticleaudio surveybiodiversity conservationincidence-based coveragemultispecies occupancy modelingpassive acoustic monitoringsound recorderspecies detection probabilitystandardized searchsurvey completenessPlant cultureSB1-1110Environmental sciencesGE1-350Plant ecologyQK900-989ENAvian Conservation and Ecology, Vol 15, Iss 1, p 8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	audio survey biodiversity conservation incidence-based coverage multispecies occupancy modeling passive acoustic monitoring sound recorder species detection probability standardized search survey completeness Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
spellingShingle	audio survey biodiversity conservation incidence-based coverage multispecies occupancy modeling passive acoustic monitoring sound recorder species detection probability standardized search survey completeness Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989 Michael J. M. Franklin Richard E. Major Michael Bedward Ross A. Bradstock Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
description	The use of programmable acoustic recorders to survey forest birds is increasing owing to a range of advantages over surveys conducted by human observers. Users of these devices require a methodological framework for designing and testing a proposed survey protocol in context, to be assured that it has the capacity to efficiently meet the requirements of their study. We aimed to demonstrate how a potential acoustic survey protocol may be effectively tested by comparison with either (1) an observer-based method using species detection probabilities, or (2) the survey completeness levels among a set of other candidate acoustic protocols. Surveys using acoustic recordings (manually processed) and standardized area searches were conducted over the same period in dry sclerophyll forests of southeastern Australia. A multispecies occupancy modeling framework was used to obtain estimates of the probability of detecting individual species for both standardized searches and an acoustic protocol representing similar temporal sampling effort. Detection probabilities for 73% of species recorded using these methods were greater with the acoustic protocol than standardized searches, which established its adequacy for particular research questions. The survey methods resulted in a similar pattern of detection probabilities for foraging stratum guilds, although members of the canopy/subcanopy guild were less likely to be detected using both methods. Survey completeness (species detected/total species) was adopted as an alternative framework for acoustic protocol evaluation. The complete acoustic data set was (1) used with the incidence-based coverage estimator (ICE) to obtain the total number of species, and (2) subsampled to produce a candidate set of potentially useful survey protocols. Completeness levels ranged from 62% to 73% in the set, which provided options for subsequent protocol selection. Other ecologists may adopt one of the frameworks to establish the adequacy of their own acoustic survey protocol to suit their research question and available resources.
format	article
author	Michael J. M. Franklin Richard E. Major Michael Bedward Ross A. Bradstock
author_facet	Michael J. M. Franklin Richard E. Major Michael Bedward Ross A. Bradstock
author_sort	Michael J. M. Franklin
title	Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
title_short	Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
title_full	Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
title_fullStr	Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
title_full_unstemmed	Establishing the adequacy of recorded acoustic surveys of forest bird assemblages
title_sort	establishing the adequacy of recorded acoustic surveys of forest bird assemblages
publisher	Resilience Alliance
publishDate	2020
url	https://doaj.org/article/284efd1a8c794c9f9e00fe985f2c9adc
work_keys_str_mv	AT michaeljmfranklin establishingtheadequacyofrecordedacousticsurveysofforestbirdassemblages AT richardemajor establishingtheadequacyofrecordedacousticsurveysofforestbirdassemblages AT michaelbedward establishingtheadequacyofrecordedacousticsurveysofforestbirdassemblages AT rossabradstock establishingtheadequacyofrecordedacousticsurveysofforestbirdassemblages
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Establishing the adequacy of recorded acoustic surveys of forest bird assemblages

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