Acoustic indices as proxies for biodiversity: a meta‐analysis

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2022, Volume and Issue: 97(6), P. 2209 - 2236

Published: Aug. 17, 2022

ABSTRACT As biodiversity decreases worldwide, the development of effective techniques to track changes in ecological communities becomes an urgent challenge. Together with other emerging methods ecology, acoustic indices are increasingly being used as novel tools for rapid assessment. These based on mathematical formulae that summarise features audio samples, aim extracting meaningful information from soundscapes. However, application this automated method has revealed conflicting results across literature, conceptual and empirical controversies regarding its primary assumption: a correlation between biological diversity. After more than decade research, we still lack statistically informed synthesis power elucidates whether they effectively function proxies Here, reviewed studies testing relationship diversity metrics (species abundance, species richness, diversity, abundance sounds, sounds) 11 most commonly indices. From 34 studies, extracted 364 effect sizes quantified magnitude direct link estimates conducted meta‐analysis. Overall, had moderate positive ( r = 0.33, CI [0.23, 0.43]), showed inconsistent performance, highly variable both within among studies. Over time, have been disregarding validation those examining progressively reporting smaller sizes. Some studied [acoustic entropy index (H), normalised difference soundscape (NDSI), complexity (ACI)] performed better retrieving information, sounds (number identified or unidentified species) best estimated facet local communities. We found no type monitored environment (terrestrial versus aquatic) procedure (acoustic non‐acoustic) performance indices, suggesting certain potential generalise their research contexts. also common statistical issues knowledge gaps remain be addressed future such high rate pseudoreplication multiple unexplored combinations metrics, taxa, regions. Our findings confirm limitations efficiently quantify alpha highlight caution is necessary when using them surrogates especially if employed single predictors. Although these able partially capture endorsing some extent rationale behind promising bases developments, far biodiversity. To guide efficient use review principal theoretical practical shortcomings, well prospects challenges Altogether, provide first comprehensive overview relation pave way standardised monitoring.

Language: Английский

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The origins of acoustic communication in vertebrates

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Jan. 17, 2020

Abstract Acoustic communication is crucial to humans and many other tetrapods, including birds, frogs, crocodilians, mammals. However, large-scale patterns in its evolution are largely unstudied. Here, we address several fundamental questions about the origins of acoustic terrestrial vertebrates (tetrapods), using phylogenetic methods. We show that significantly associated with nocturnal activity. find does not increase diversification rates, a surprising result given speciation-focused studies frog calls bird songs. also demonstrate presence strongly conserved over time. Finally, evolved independently most major tetrapod groups, often remarkably ancient (~100–200 million years ago). Overall, role ecology shaping signal applies surprisingly deep timescales, whereas may not.

Language: Английский

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Avian Diversity: Speciation, Macroevolution, and Ecological Function

Annual Review of Ecology Evolution and Systematics, Journal Year: 2020, Volume and Issue: 51(1), P. 533 - 560

Published: Aug. 28, 2020

The origin, distribution, and function of biological diversity are fundamental themes ecology evolutionary biology. Research on birds has played a major role in the history development these ideas, yet progress was for many decades limited by focus patterns current diversity, often restricted to particular clades or regions. Deeper insight is now emerging from recent wave integrative studies combining comprehensive phylogenetic, environmental, functional trait data at unprecedented scales. We review empirical advances describe how they reshaping our understanding global bird processes which it arises, with implications avian biogeography ecology. Further expansion integration sets may help resolve longstanding debates about origins biodiversity offer framework predicting response ecosystems environmental change.

Language: Английский

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A global analysis of song frequency in passerines provides no support for the acoustic adaptation hypothesis but suggests a role for sexual selection

Ecology Letters, Journal Year: 2020, Volume and Issue: 24(3), P. 477 - 486

Published: Dec. 12, 2020

Abstract Animals use acoustic signals for communication, implying that the properties of these can be under strong selection. The adaptation hypothesis predicts species in dense habitats emit lower‐frequency sounds than those open areas because low‐frequency propagate further vegetation high‐frequency sounds. Signal frequency may also sexual selection it correlates with body size and are perceived as more intimidating. Here, we evaluate hypotheses by analysing variation peak song across 5,085 passerine (Passeriformes). A phylogenetically informed analysis revealed decreases increasing mass male‐biased dimorphism. However, found no support predicted relationship between habitat. Our results suggest global is mostly driven natural causing evolutionary shifts rather habitat‐related on sound propagation.

Language: Английский

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Human-machine-learning integration and task allocation in citizen science

Humanities and Social Sciences Communications, Journal Year: 2022, Volume and Issue: 9(1)

Published: Feb. 9, 2022

Abstract The field of citizen science involves the participation citizens across different stages a scientific project; within this there is currently rapid expansion integration humans and AI computational technologies based on machine learning and/or neural networking-based paradigms. distribution tasks between (“the crowd”), experts, type has received relatively little attention. To illustrate current state task allocation in projects that integrate technologies, an integrative literature review 50 peer-reviewed papers was conducted. A framework used for characterizing two main dimensions: (a) nature outsourced to crowd, (b) skills required by crowd perform task. extended include performed experts as well. Most do reported are well-structured, involve interdependence, require prevalent among general population. work typically structured at higher-level interdependence than citizens, requiring expertize specific fields. Unsurprisingly, capable performing mostly well-structured high-level interdependence. It argued results from combination computation may disincentivize certain volunteer groups. Assigning meaningful way scientists alongside unavoidable design challenge.

Language: Английский

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Ecoacoustics in the rain: understanding acoustic indices under the most common geophonic source in tropical rainforests

Remote Sensing in Ecology and Conservation, Journal Year: 2020, Volume and Issue: 6(3), P. 248 - 261

Published: May 22, 2020

Abstract Rainfall is one of the most predominant geophonic sources in nature, and major climatic phenomenon influencing species biology tropical ecosystems. Although its effects on acoustic indices have been studied, rainfall recognized as a nuisance factor affecting their estimation. Consequently, files with sounds are typically removed from ecoacoustic analyses. In rainforests, where common unpredictable event, influence needs to be explicitly examined before implementing passive monitoring. Using mixed‐effects models we assessed effect different conditions direction magnitude values eight commonly used indices. We obtained 18336 1‐min recordings 28 sampling sites montane forest northern Andes Colombia between May‐July 2018. identified 2867 containing light heavy rainfall. found that both occurrence variation intensity were associated increases ACI, ADI, H, M index values, decreases AEI, BI, NDSI, NP values. The estimated exhibited differential sensitivity rainfall, M, showing higher differences increasing frequency Regardless change caused by depended index. For instance, ACI BI showed low can considered reliable metrics, even during contrast, might lead misleading inferences, if events not calculation. stress importance careful interpretation biological inferences based these sensitive encourage an explicit assessment particularly short‐term surveys highly pluvious regions conspicuous component soundscape.

Language: Английский

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Comparative bioacoustics: a roadmap for quantifying and comparing animal sounds across diverse taxa

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2021, Volume and Issue: 96(4), P. 1135 - 1159

Published: March 2, 2021

Animals produce a wide array of sounds with highly variable acoustic structures. It is possible to understand the causes and consequences this variation across taxa phylogenetic comparative analyses. Acoustic evolutionary analyses are rapidly increasing in sophistication such that choosing appropriate approaches increasingly difficult. However, correct choice analysis can have profound effects on output inferences. Here, we identify address some challenges for growing field by providing roadmap quantifying comparing sound context researchers broad range scientific backgrounds. Sound, as continuous, multidimensional trait be particularly challenging measure because it hard variables compared also no small feat process analyse resulting high-dimensional data using subsequent analysis. Additionally, terminological inconsistencies role learning development traits need considered. Phylogenetic their own sets caveats consider. We provide set recommendations delimiting signals into discrete, comparable units. present three-stage workflow extracting relevant data, including options multivariate dimensionality reduction compatible then summarize available how they been used bioacoustics, limitations behavioural data. Lastly, recommend apply these methods study systems. In way, an integrated framework aid quantitative cross-taxa animal addition, advocate standardization terminology disciplines taxa, adoption automated feature extraction, establishment strong archival practices recordings Combining our proposed will greatly advance reproducibility, biological interpretation, longevity bioacoustic studies.

Language: Английский

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The uses and implications of avian vocalizations for conservation planning

Conservation Biology, Journal Year: 2020, Volume and Issue: 35(1), P. 50 - 63

Published: Jan. 28, 2020

There is a growing recognition that animal behavior can affect wildlife conservation, but there have been few direct studies of in conservation programs. However, great deal existing behavioral research be applied the context conservation. Research on avian vocalizations provides an excellent example. The conspicuous nature vocal birds makes it useful tool for monitoring populations and measuring biodiversity, importance goes beyond monitoring. Geographic song variants with population-specific signatures, or dialects, territory formation mate choice. Dialects are influenced by cultural evolution natural selection changes accumulate even during timescale interventions, such as translocations, reintroductions, ex situ breeding. Information from into used to improve planning increase success interventions. Vocalizations confer number benefits practitioners through monitoring, providing baseline data individuals. influence variation formation, choice, gene flow should taken account because differences could create obstacles programs bring multiple together so reduce interventions.Implicaciones y Usos de las Vocalizaciones Aves para la Conservación Planeación Resumen Hay un creciente reconocimiento que el comportamiento puede afectar conservación fauna, pero ha habido pocos estudios directos del en los programas conservación. Sin embargo, una gran cantidad investigación existente sobre aplicarse contexto Las investigaciones vocalizaciones aves son excelente ejemplo. La naturaleza conspicua hace sea herramienta útil monitoreo poblaciones medidas biodiversidad, importancia va más allá monitoreo. variantes geográficas canto con firmas específicas cada población, también conocidas como dialectos, pueden formación territorio elección pareja. Los dialectos están influenciados por evolución selección cambios acumularse incluso durante escala tiempo intervenciones conservación, reubicaciones, reintroducciones reproducción situ. información disponible partir existentes usarse mejorar planeación e incrementar éxito intervenciones. otorgar número beneficios quienes practican través monitoreo, proporcionando línea base individuos. influencia variación territorio, pareja flujo génico deberían considerarse ya diferencias culturales podrían crear obstáculos agrupan diferentes ello reducen intervenciones.目前, 人们已越来越多地认识到动物行为可以影响野生动物保护, 但在保护项目中对动物行为的直接研究还很少。不过, 大量现有的行为研究都可以应用于到保护之中。鸟类声音的研究就是一个很好的例子。鸟类鸣叫行为十分引人注意, 可以作为监测种群和衡量生物多样性的有用工具, 但鸟鸣在保护中的重要意义不仅仅在于监测。鸟类的叫声具有特定种群特征的地理变异, 或称之为方言, 这可以影响领域形成和配偶选择。鸟类的方言受文化演化和自然选择的影响, 且在物种保护措施 (如异地放归、重引入、迁地繁殖) 的时间尺度内也会不断积累变化。来自现有鸟鸣研究的信息可用于改进保护计划、促进干预措施的成功。鸟鸣研究可以通过监测, 提供种群和个体的基础数据, 为保护实践者带来许多好处。然而, 保护实践者还应该考虑鸟类种群的文化差异对领域形成、配偶选择和基因流的影响, 因为文化差异可能会阻碍将来自多个种群的鸟类聚集在一起的保护计划的实施, 从而降低干预措施的成功率。【翻译: 胡怡思; 审校: 聂永刚】.

Language: Английский

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Subspecies‐level distribution maps for birds of the Amazon basin and adjacent areas

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 51(1), P. 14 - 28

Published: Sept. 23, 2023

Abstract Aim Distribution maps for Amazonian birds are often limited to species‐level taxonomy even though many subspecies represent biological species. We provide digital depicting subspecies‐level distributions of Neotropical in the Amazonas River basin and adjoining areas. Location Amazon region, which includes entire basin, east slope tropical Andes, French Guiana, Suriname, Guyana, south Venezuela (Bolivar departments), parts Brazilian Cerrado Araguaia‐Tocantins basin. Taxon Birds (Class Aves). Methods To build distribution maps, we compiled a point‐locality database 620,000 records, 90% specimens vouchered research collections. After manually cleaning optimising quality point localities, generated extent‐of‐occurrence polygons at level using concave hull function. corrected each polygon based on literature expert knowledge. used this data set define zoogeographical regions multidimensional scaling clustering analyses, then compared subspecies‐defined zoogeographic inferred from data. Results range 3990 subspecies, representing 2043 species 65 families. The average size was 955,739 km 2 , with half taxa having sizes smaller than 230,484 (median value) nearly one‐quarter all ranges 50,000 . identified 10 comparison four areas analysis same largely congruent previously endemism. Main Conclusions new bird allow biodiversity studies (e.g. macroecology, evolution, conservation) be conducted level, facilitate biogeographic, ecological, evolutionary conservation most biologically diverse region world.

Language: Английский

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

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 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.

Language: Английский

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