Temporal dynamics of acoustic diversity in managed forests

Frontiers in Ecology and Evolution, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 24, 2024

Introduction In production forests, management can have cascading effects on biodiversity and ecosystem services. Acoustic diversity reflects the of vocalizing animals has also considerable recreational value for human well-being, but relationship between acoustic forest remains largely unexplored Method We recorded plots along a gradient silvicultural intensity (SMI) in three regions Germany. explored diurnal seasonal temporal dynamics index (ADI) from March to July using generalized additive mixed models (GAMMs). further investigated interrelation intensity, structural diversity, as well tree bird species richness abundance equation modeling (SEM). Results Silvicultural had significant ADI May June dawn till dusk, variance explained by SMI was low. confirmed our hypothesis that reduced due its abundance. Discussion indices provide valuable insights into how affects activity soniferous communities. discuss this indicate both changes their vocal activity. address potential implications management.

Language: Английский

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Temporal Soundscape Patterns in a Panamanian Tree Diversity Experiment: Polycultures Show an Increase in High Frequency Cover

Frontiers in Ecology and Evolution, Journal Year: 2022, Volume and Issue: 10

Published: Feb. 8, 2022

In this ecoacoustic study we used the setting of a tropical tree diversity planted forest to analyze temporal patterns in composition soundscapes and test effects species richness on associated biodiversity measured as acoustic diversity. The analysis offers easy, rapid sustainable methods when assessing biodiversity. During last years quantification regional or global variability sounds different has been evolving into an important tool for conservation, especially since case studies confirmed relationship between land-use management, structure Here analyzed from two seasons (dry rainy season) aurally inspected subset audio recordings describe soundscape composition. Several indices were calculated performed correlation non-metric multidimensional scaling identify that: (i) complementary each other such represented aspects local (ii) related most strongly differences among richness, season day phase. Thus, chose “High Frequency Cover,” “Bioacoustic Index,” “Events Per Second” hypothesis that increases with increasing richness. Monocultures differed significantly polycultures during night recordings, respect High Cover. This index covers above 8 kHz thus represents part orthopteran community. We conclude young plantation had positive vocalizing communities. strongest found activity contrast birds, orthopterans have smaller home ranges, are therefore indicator small scale environmental conditions.

Language: Английский

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Acoustic indices as proxies for biodiversity in certified and non-certified cocoa plantations in Indonesia

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 197(1)

Published: Dec. 16, 2024

Language: Английский

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Predicting bird diversity through acoustic indices within the Atlantic Forest biodiversity hotspot

Frontiers in Remote Sensing, Journal Year: 2023, Volume and Issue: 4

Published: Dec. 7, 2023

The increasing conversion of natural areas for anthropic land use has been a major cause habitat loss, destabilizing ecosystems and leading to biodiversity crisis. Passive acoustic sensors open the possibility remotely sensing fauna on large spatial temporal scales, improving our understanding current state effects human influences. Acoustic indices have widely used tested in recent years, with an aim towards relationship between activity several taxa different types environments. However, studies shown divergent relationships vocal most soniferous taxa. A combination has, turn, reported as promising tool representing contexts. We uni- bivariate models test combinations 8 common relation bird assemblage metrics. recorded twenty-two study sites Brazil’s Atlantic Forest three environments each site (forest, pasture, swamp). Our results showed that 1) best explaining richness, abundance, diversity were Bioacoustic Complexity; 2) type environment swamp) influenced performance biodiversity, highest score model (biggest R 2 value) being Diversity indices. do support monitoring birds, but combining is encouraged since it provided results. given divergence we found across environments, recommend sets are determine which them describe pattern specific habitat. Based results, propose patterns can be predicted through patterns. level confidence will depend index focal interest (i.e., amphibians, insects, mammals).

Language: Английский

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Soundscape structure in forests surrounded by protected and productive areas in central Costa Rica

Frontiers in Remote Sensing, Journal Year: 2023, Volume and Issue: 4

Published: March 9, 2023

Ecosystems are under a multitude of pressures, including land-use change, overexploitation, pollution, and climate change. Most studies, resources, conservation efforts allocated to protected areas, while anthropogenic activities in their surroundings may affect them ways that poorly understood. We evaluated soundscape structure forests surrounded by or productive areas central Costa Rica. sampled soundscapes 91 recording sites Grecia Forest Reserve Poas Volcano National Park, surrounding with (predominantly agricultural urban). classified sampling into three clusters according landscape entropy, forest amount, fragmentation points: more fragmented, conserved, intermediate. The conserved cluster showed higher acoustic diversity but lower complexity, shorter duration sounds all frequency ranges, amount energy the biological bands than fragmented cluster. additionally found positive significant relationship between entropy indices, negative activity indices. Indices, such as spectral temporal variance, total seemed be better fit complexity bioacoustic indices indicators habitat this study. Acoustic revealed matrices have an impact on environments. encourage researchers decision-makers carefully interpret when evaluating habitats showing value because might not necessarily reflect either high level biodiversity conservation. Also, we highlight importance preserving undisturbed forested around they important for maintaining diversity.

Language: Английский

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Does the sound environment influence the behaviour of zoo-housed birds? A preliminary investigation of ten species across two zoos

Behavioural Processes, Journal Year: 2022, Volume and Issue: 203, P. 104763 - 104763

Published: Oct. 7, 2022

In the zoo, sound environment experienced by captive wild animals will contain numerous anthropogenic features that may elicit different responses to those stimulated naturally created, or more biologically relevant, sounds. Husbandry activities, visitor presence and neighbouring species (free-living captive) all influence sounds around zoo-housed species; an animal's behavioural therefore provide insight into how its welfare state is influenced this changing environment. This project aimed investigate animal behaviour was at two large UK zoos; one situated in a rural location other urban location. Species were selected based on their relevance of natural ecology (e.g., as form communication and/or for anti-predator responses) novelty research subjects scientific literature. Behavioural data collection conducted five days per enclosure zoo population individual level birds housed styles enclosure. Instantaneous sampling one-minute intervals used collect information behaviours, assessed using pre-determined species-specific ethogram. Event behaviours collected continuously each observation period. The recorded during recording session recorder mounted tripod. Results showed variety visitors potential associated changes with some being (and increases volume sound) compared others, e.g., vigilance vocalisations. Overall, few thought indicate poor impoverished states linked visitors, but we recommend zoos consider further measurement species-by-species basis capture variation number

Language: Английский

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Automated bird acoustic detection at Las Arrieras Nature Reserve in Sarapiquí, Costa Rica

Published: Nov. 15, 2022

Ecological characteristics favor high biodiversity on the Caribbean slope of Costa Rica, but this piedmont zone is poorly studied. In birds, use automated song and call recognition has progressed to support bird studies about ecology behavior. We used a Pattern Matching method label presence Cinnamon Woodpecker, Great-Green Macaw, Red-capped Manakin Chestnut-backed Antbird create random forest model detect species' vocalizations characterize their vocal activity in reserve. Audiomoth recorders. For all acoustic detection models, accuracy, precision values above 91% were obtained despite imbalance positive negative classes, value Unweighted Average Recall was for each model. Three sites showed highest number detections per site varied among species. A preference some within reserve identified A. ambiguus C. mentalis more generalist loricatus P. exsul. species, greater found morning hours with less afternoon species peak between February May. The patterns agreed literature when analyzing ecological behaviors inside outside breeding season birds Rica. This information will improve conservation decision making involved other that develop these ecosystems.

Language: Английский

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