Influence of recording devices and environmental noise on acoustic index scores: Implications for bird sound-based assessments

Ecological Indicators, Год журнала: 2024, Номер 159, С. 111759 - 111759

Опубликована: Фев. 1, 2024

Passive acoustic monitoring serves as a minimally invasive and effective method for biodiversity assessment, particularly in bird through the application of indices. However, use different recording devices types environmental noise (e.g., rain, wind, stream, traffic noise) lead to signal distortions that affect ecoacoustics Currently, there are no established guidelines specifying technical requirements signal-to-noise ratio (SNR) threshold accurate calculation To enhance accuracy indices assessments, this study investigated impact (rain, on In study, we selected six indices: Acoustic Complexity Index, Diversity Evenness Bioacoustic Entropy Normalized Difference Soundscape used four simultaneously record 104 h bird-sound data at same location. addition, 44 noisy signals with intensities were artificially synthesized comparison. The sound then analyze effects assessment. Our results showed (a) all affected by device used; (b) each index had sensitivities types; (c) was SNR above which effect negligible. This provides recommendations selection determines thresholds signals, contributing refinement protocols acquiring preprocessing These findings aim establish standardized acquisition future

Язык: Английский

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A classifier-deduced signal extraction approach for time difference estimation in acoustic sensor networks

Ecological Informatics, Год журнала: 2025, Номер unknown, С. 103032 - 103032

Опубликована: Янв. 1, 2025

Язык: Английский

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Territorial Acoustic Species Estimation Using Acoustic Sensor Networks

Опубликована: Янв. 1, 2025

Язык: Английский

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Acoustic Niche Partitioning in a Bird Assembly in Caatinga, Northeastern Brazil

Austral Ecology, Год журнала: 2025, Номер 50(2)

Опубликована: Фев. 1, 2025

ABSTRACT We investigated vocal adjustment andacoustic niche partitioning in a bird assemblage the Caatinga based on Acoustic Niche Hypothesis and Species Recognition Hypothesis. conducted 72 recordings of 3‐min duration along two transects 1 km length, between July 2022 February 2023. Each transect was divided into six points, spaced 200 m apart. analysed spectral temporal overlap (Pianka index) 15 vocally dominant species tested significance using null models 1000 repetitions Randomization Algorithm 3. Phylogenetic distances were estimated from 2500 phylogenies to assess their correlation with acoustic overlap, Generalised Linear Models partial Mantel test. Twenty‐five pairs exhibited high (> 0.6), whereas all showed low (< 0.4). The analysis suggested that observed (0.322) lower than expected by chance (0.261), indicating significant difference [Standardised Effect Size (SES) = 7.162, p < 1]. values, (0.097) being slightly (0.111), but no (SES −6.752, > 1). Our results revealed (Estimate −0.0059, t −0.286, 0.766) or phylogenetic distance −0.0001, −0.966, 0.336) 0.00002, 0.125, 0.901) overlap. There also controlled ( r −0.02712, 0.553). evidence negative association among species. relationships did not explain patterns. Therefore, it is possible avoidance actively occurs regardless other factors, such as

Язык: Английский

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Territorial Acoustic Species Estimation using Acoustic Sensor Networks

Опубликована: Янв. 1, 2025

Язык: Английский

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The acoustic adaptation hypothesis across terrestrial vertebrates: a meta-analysis

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Фев. 21, 2024

Acoustic communication plays a prominent role in various ecological and evolutionary processes involving social interactions. The properties of acoustic signals are thought to be influenced not only by the interaction between signaller receiver but also characteristics environment through which signal is transmitted. This conjecture forms core so-called "acoustic adaptation hypothesis" (AAH), posits that vegetation structure affects frequency temporal parameters emitted as function their degradation properties. Specifically, animals densely vegetated 'closed habitats' expected produce longer with lower repetition rates frequencies (minimum, mean, maximum, peak) compared ones inhabiting less 'open habitats'. To date, this hypothesis has received mixed results, level support depending on taxonomic group methodology used. We conducted systematic literature search empirical studies testing for an effect signalling assessed generality AAH using meta-analytic approach based 371 sizes from 75 57 taxa encompassing birds, mammals amphibians. Overall, our results do provide consistent AAH, neither within-species comparisons (suggesting no overall phenotypically plastic response structure) nor among-species response). However, when considering birds only, we found weak comparisons, was mainly driven measured bandwidth, suggesting variable may exhibit structure. For significant after excluding comparative did account phylogenetic non-independence. Collectively, synthesis does universal evolution communication. highlight need more work currently under-studied such amphibians, mammals, insects. Furthermore, propose framework future research AAH. specifically advocate detailed quantitative characterization habitats identify highest detection probability determine if greater distances preferentially Finally, stress tests should focus selected increased transmission distance.

Язык: Английский

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Robust rhythm reporting will advance ecological and evolutionary research

Methods in Ecology and Evolution, Год журнала: 2023, Номер 14(6), С. 1398 - 1407

Опубликована: Апрель 29, 2023

Abstract Rhythmicity in the millisecond to second range is a fundamental building block of communication and coordinated movement. But how widespread are rhythmic capacities across species, did they evolve under different environmental pressures? Comparative research necessary answer these questions but has been hindered by limited crosstalk comparability among results from study species. Most acoustics studies do not explicitly focus on characterising or quantifying rhythm, many just few scrapes away contributing advancing field comparative rhythm research. Here, we present an eight‐level reporting framework which details actionable steps researchers can take report rhythm‐relevant metrics. Levels fall into two categories: metric data sharing. Metric levels include defining metrics, providing point estimates temporal interval variability, distributions, conducting analyses. Data sharing are: audio recordings, durations, sound element start end times, recordings with start/end times. Using sounds recorded sperm whale as case study, demonstrate each level be implemented real data. We also highlight existing best practice examples recent spanning multiple clearly detail engagement our tailored case‐by‐case based much time effort willing contribute. Finally, illustrate at any suggested will help advance This actively facilitate approach acoustic rhythms while promoting cooperation sustainability. By metrics more consistently broadly, new avenues inquiry several long‐standing, big picture become tractable. These lines inform only about behavioural ecology animals evolution phenomena neuroscience production perception. Rhythm emergent feature life; adopting framework, fields species understand why.

Язык: Английский

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Meta‐analysis of the acoustic adaptation hypothesis reveals no support for the effect of vegetation structure on acoustic signalling across terrestrial vertebrates

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 12, 2024

ABSTRACT Acoustic communication plays a prominent role in various ecological and evolutionary processes involving social interactions. The properties of acoustic signals are thought to be influenced not only by the interaction between signaller receiver but also characteristics environment through which signal is transmitted. This conjecture forms core so‐called “acoustic adaptation hypothesis” (AAH), posits that vegetation structure affects frequency temporal parameters emitted as function their degradation properties. Specifically, animals densely vegetated “closed habitats” expected produce longer with lower repetition rates frequencies (minimum, mean, maximum, peak) compared those inhabiting less‐vegetated “open habitats”. To date, this hypothesis has received mixed results, level support depending on taxonomic group methodology used. We conducted systematic literature search empirical studies testing for an effect signalling assessed generality AAH using meta‐analytic approach based 371 sizes from 75 57 taxa encompassing birds, mammals amphibians. Overall, our results do provide consistent AAH, neither within‐species comparisons (suggesting no overall phenotypically plastic response structure) nor among‐species response). However, when considering birds only, we found weak comparisons, was mainly driven measured bandwidth, suggesting variable may exhibit structure. For significant after excluding comparative did account phylogenetic non‐independence. Collectively, synthesis does universal evolution communication. highlight need more work currently under‐studied such amphibians, mammals, insects. Furthermore, propose framework future research AAH. specifically advocate detailed quantitative characterisation habitats identify highest detection probability determine if greater distances preferentially Finally, stress tests should focus selected increased transmission distance.

Язык: Английский

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Song overlapping in territorial defense and other contexts by the Hermit Thrush (Catharus guttatus)

The Wilson Journal of Ornithology, Год журнала: 2024, Номер 136(1)

Опубликована: Апрель 24, 2024

Язык: Английский

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The impact of land use on the acoustic behaviour of cicadas in the Chocó lowland tropical forest of Ecuador

Insect Conservation and Diversity, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 21, 2024

Abstract The biodiversity of tropical rainforests is under extreme pressure due to the expansion agricultural land. Beyond immediate risk species extinction, intensification land use can alter species' behaviour with consequences for entire ecosystem. In this study we investigated impact on acoustic cicadas in highly biodiverse Ecuadorian Chocó region. We used passive monitoring (PAM) collection audio data, from which identified and analysed sound activity structure daily patterns along a chronosequence forest recovery. At landscape scale studied surrounding either dominated by or forests cicadas. Cicada was significantly lower active agriculture compared undisturbed old‐growth increased recovery gradient. diurnal pattern changed simple more complex synchronized gradient towards forests. A additionally reduced simplified Taken together, at local scales affects overall activity, synchrony vocalizing song This concerning trend considering direct link between chorusing fitness However, mature restoration embedded surroundings showed restored cicada behaviours similar those forests, underlines conservation value advanced secondary importance support regeneration tropics.

Язык: Английский

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